Tag Archives: lightweight
Exosuits don’t generally scream “fashionable” or “svelte.” Take the mind-controlled robotic exoskeleton that allowed a paraplegic man to kick off the World Cup back in 2014. Is it cool? Hell yeah. Is it practical? Not so much.
Yapping about wearability might seem childish when the technology already helps people with impaired mobility move around dexterously. But the lesson of the ill-fated Google Glassholes, which includes an awkward dorky head tilt and an assuming voice command, clearly shows that wearable computer assistants can’t just work technologically—they have to look natural and allow the user to behave like as usual. They have to, in a sense, disappear.
To Dr. Jose Pons at the Legs + Walking Ability Lab in Chicago, exosuits need three main selling points to make it in the real world. One, they have to physically interact with their wearer and seamlessly deliver assistance when needed. Two, they should cognitively interact with the host to guide and control the robot at all times. Finally, they need to feel like a second skin—move with the user without adding too much extra mass or reducing mobility.
This week, a US-Korean collaboration delivered the whole shebang in a Lululemon-style skin-hugging package combined with a retro waist pack. The portable exosuit, weighing only 11 pounds, looks like a pair of spandex shorts but can support the wearer’s hip movement when needed. Unlike their predecessors, the shorts are embedded with sensors that let them know when the wearer is walking versus running by analyzing gait.
Switching between the two movement modes may not seem like much, but what naturally comes to our brains doesn’t translate directly to smart exosuits. “Walking and running have fundamentally different biomechanics, which makes developing devices that assist both gaits challenging,” the team said. Their algorithm, computed in the cloud, allows the wearer to easily switch between both, with the shorts providing appropriate hip support that makes the movement experience seamless.
To Pons, who was not involved in the research but wrote a perspective piece, the study is an exciting step towards future exosuits that will eventually disappear under the skin—that is, implanted neural interfaces to control robotic assistance or activate the user’s own muscles.
“It is realistic to think that we will witness, in the next several years…robust human-robot interfaces to command wearable robotics based on…the neural code of movement in humans,” he said.
A “Smart” Exosuit Hack
There are a few ways you can hack a human body to move with an exosuit. One is using implanted electrodes inside the brain or muscles to decipher movement intent. With heavy practice, a neural implant can help paralyzed people walk again or dexterously move external robotic arms. But because the technique requires surgery, it’s not an immediate sell for people who experience low mobility because of aging or low muscle tone.
The other approach is to look to biophysics. Rather than decoding neural signals that control movement, here the idea is to measure gait and other physical positions in space to decipher intent. As you can probably guess, accurately deciphering user intent isn’t easy, especially when the wearable tries to accommodate multiple gaits. But the gains are many: there’s no surgery involved, and the wearable is low in energy consumption.
The authors decided to tackle an everyday situation. You’re walking to catch the train to work, realize you’re late, and immediately start sprinting.
That seemingly easy conversion hides a complex switch in biomechanics. When you walk, your legs act like an inverted pendulum that swing towards a dedicated center in a predictable way. When you run, however, the legs move more like a spring-loaded system, and the joints involved in the motion differ from a casual stroll. Engineering an assistive wearable for each is relatively simple; making one for both is exceedingly hard.
Led by Dr. Conor Walsh at Harvard University, the team started with an intuitive idea: assisted walking and running requires specialized “actuation” profiles tailored to both. When the user is moving in a way that doesn’t require assistance, the wearable needs to be out of the way so that it doesn’t restrict mobility. A quick analysis found that assisting hip extension has the largest impact, because it’s important to both gaits and doesn’t add mass to the lower legs.
Building on that insight, the team made a waist belt connected to two thigh wraps, similar to a climbing harness. Two electrical motors embedded inside the device connect the waist belt to other components through a pulley system to help the hip joints move. The whole contraption weighed about 11 lbs and didn’t obstruct natural movement.
Next, the team programmed two separate supporting profiles for walking and running. The goal was to reduce the “metabolic cost” for both movements, so that the wearer expends as little energy as needed. To switch between the two programs, they used a cloud-based classification algorithm to measure changes in energy fluctuation to figure out what mode—running or walking—the user is in.
Initial trials on treadmills were highly positive. Six male volunteers with similar age and build donned the exosuit and either ran or walked on the treadmill at varying inclines. The algorithm performed perfectly at distinguishing between the two gaits in all conditions, even at steep angles.
An outdoor test with eight volunteers also proved the algorithm nearly perfect. Even on uneven terrain, only two steps out of all test trials were misclassified. In an additional trial on mud or snow, the algorithm performed just as well.
“The system allows the wearer to use their preferred gait for each speed,” the team said.
Software excellence translated to performance. A test found that the exosuit reduced the energy for walking by over nine percent and running by four percent. It may not sound like much, but the range of improvement is meaningful in athletic performance. Putting things into perspective, the team said, the metabolic rate reduction during walking is similar to taking 16 pounds off at the waist.
The Wearable Exosuit Revolution
The study’s lightweight exoshorts are hardly the only players in town. Back in 2017, SRI International’s spin-off, Superflex, engineered an Aura suit to support mobility in the elderly. The Aura used a different mechanism: rather than a pulley system, it incorporated a type of smart material that contracts in a manner similar to human muscles when zapped with electricity.
Embedded with a myriad of sensors for motion, accelerometers and gyroscopes, Aura’s smartness came from mini-computers that measure how fast the wearer is moving and track the user’s posture. The data were integrated and processed locally inside hexagon-shaped computing pods near the thighs and upper back. The pods also acted as the control center for sending electrical zaps to give the wearer a boost when needed.
Around the same time, a collaboration between Harvard’s Wyss Institute and ReWalk Robotics introduced a fabric-based wearable robot to assist a wearer’s legs for balance and movement. Meanwhile, a Swiss team coated normal fabric with electroactive material to weave soft, pliable artificial “muscles” that move with the skin.
Although health support is the current goal, the military is obviously interested in similar technologies to enhance soldiers’ physicality. Superflex’s Aura, for example, was originally inspired by technology born from DARPA’s Warrior Web Program, which aimed to reduce a soldier’s mechanical load.
That said, military gear has had a long history of trickling down to consumer use. Similar to the way camouflage, cargo pants, and GORE-TEX trickled down into the consumer ecosphere, it’s not hard to imagine your local Target eventually stocking intelligent exowear.
Image and Video Credit: Wyss Institute at Harvard University. Continue reading →
The energy and transportation industries are being aggressively disrupted by converging exponential technologies.
In just five days, the sun provides Earth with an energy supply exceeding all proven reserves of oil, coal, and natural gas. Capturing just 1 part in 8,000 of this available solar energy would allow us to meet 100 percent of our energy needs.
As we leverage renewable energy supplied by the sun, wind, geothermal sources, and eventually fusion, we are rapidly heading towards a future where 100 percent of our energy needs will be met by clean tech in just 30 years.
During the past 40 years, solar prices have dropped 250-fold. And as these costs plummet, solar panel capacity continues to grow exponentially.
On the heels of energy abundance, we are additionally witnessing a new transportation revolution, which sets the stage for a future of seamlessly efficient travel at lower economic and environmental costs.
Top 5 Transportation Breakthroughs (2019-2024)
Entrepreneur and inventor Ramez Naam is my go-to expert on all things energy and environment. Currently serving as the Energy Co-Chair at Singularity University, Naam is the award-winning author of five books, including the Nexus series of science fiction novels. Having spent 13 years at Microsoft, his software has touched the lives of over a billion people. Naam holds over 20 patents, including several shared with co-inventor Bill Gates.
In the next five years, he forecasts five respective transportation and energy trends, each poised to disrupt major players and birth entirely new business models.
Let’s dive in.
Autonomous cars drive 1 billion miles on US roads. Then 10 billion
Alphabet’s Waymo alone has already reached 10 million miles driven in the US. The 600 Waymo vehicles on public roads drive a total of 25,000 miles each day, and computer simulations provide an additional 25,000 virtual cars driving constantly. Since its launch in December, the Waymo One service has transported over 1,000 pre-vetted riders in the Phoenix area.
With more training miles, the accuracy of these cars continues to improve. Since last year, GM Cruise has improved its disengagement rate by 321 percent since last year, trailing close behind with only one human intervention per 5,025 miles self-driven.
Autonomous taxis as a service in top 20 US metro areas
Along with its first quarterly earnings released last week, Lyft recently announced that it would expand its Waymo partnership with the upcoming deployment of 10 autonomous vehicles in the Phoenix area. While individuals previously had to partake in Waymo’s “early rider program” prior to trying Waymo One, the Lyft partnership will allow anyone to ride in a self-driving vehicle without a prior NDA.
Strategic partnerships will grow increasingly essential between automakers, self-driving tech companies, and rideshare services. Ford is currently working with Volkswagen, and Nvidia now collaborates with Daimler (Mercedes) and Toyota. Just last week, GM Cruise raised another $1.15 billion at a $19 billion valuation as the company aims to launch a ride-hailing service this year.
“They’re going to come to the Bay Area, Los Angeles, Houston, other cities with relatively good weather,” notes Naam. “In every major city within five years in the US and in some other parts of the world, you’re going to see the ability to hail an autonomous vehicle as a ride.”
Cambrian explosion of vehicle formats
Naam explains, “If you look today at the average ridership of a taxi, a Lyft, or an Uber, it’s about 1.1 passengers plus the driver. So, why do you need a large four-seater vehicle for that?”
Small electric, autonomous pods that seat as few as two people will begin to emerge, satisfying the majority of ride-hailing demands we see today. At the same time, larger communal vehicles will appear, such as Uber Express, that will undercut even the cheapest of transportation methods—buses, trams, and the like. Finally, last-mile scooter transit (or simply short-distance walks) might connect you to communal pick-up locations.
By 2024, an unimaginably diverse range of vehicles will arise to meet every possible need, regardless of distance or destination.
Drone delivery for lightweight packages in at least one US city
Wing, the Alphabet drone delivery startup, recently became the first company to gain approval from the Federal Aviation Administration (FAA) to make deliveries in the US. Having secured approval to deliver to 100 homes in Canberra, Australia, Wing additionally plans to begin delivering goods from local businesses in the suburbs of Virginia.
The current state of drone delivery is best suited for lightweight, urgent-demand payloads like pharmaceuticals, thumb drives, or connectors. And as Amazon continues to decrease its Prime delivery times—now as speedy as a one-day turnaround in many cities—the use of drones will become essential.
Robotic factories drive onshoring of US factories… but without new jobs
The supply chain will continue to shorten and become more agile with the re-onshoring of manufacturing jobs in the US and other countries. Naam reasons that new management and software jobs will drive this shift, as these roles develop the necessary robotics to manufacture goods. Equally as important, these robotic factories will provide a more humane setting than many of the current manufacturing practices overseas.
Top 5 Energy Breakthroughs (2019-2024)
First “1 cent per kWh” deals for solar and wind signed
Ten years ago, the lowest price of solar and wind power fell between 10 to 12 cents per kilowatt hour (kWh), over twice the price of wholesale power from coal or natural gas.
Today, the gap between solar/wind power and fossil fuel-generated electricity is nearly negligible in many parts of the world. In G20 countries, fossil fuel electricity costs between 5 to 17 cents per kWh, while the average cost per kWh of solar power in the US stands at under 10 cents.
Spanish firm Solarpack Corp Technological recently won a bid in Chile for a 120 MW solar power plant supplying energy at 2.91 cents per kWh. This deal will result in an estimated 25 percent drop in energy costs for Chilean businesses by 2021.
Naam indicates, “We will see the first unsubsidized 1.0 cent solar deals in places like Chile, Mexico, the Southwest US, the Middle East, and North Africa, and we’ll see similar prices for wind in places like Mexico, Brazil, and the US Great Plains.”
Solar and wind will reach >15 percent of US electricity, and begin to drive all growth
Just over eight percent of energy in the US comes from solar and wind sources. In total, 17 percent of American energy is derived from renewable sources, while a whopping 63 percent is sourced from fossil fuels, and 17 percent from nuclear.
Last year in the U.K., twice as much energy was generated from wind than from coal. For over a week in May, the U.K. went completely coal-free, using wind and solar to supply 35 percent and 21 percent of power, respectively. While fossil fuels remain the primary electricity source, this week-long experiment highlights the disruptive potential of solar and wind power that major countries like the U.K. are beginning to emphasize.
“Solar and wind are still a relatively small part of the worldwide power mix, only about six percent. Within five years, it’s going to be 15 percent in the US and more than close to that worldwide,” Naam predicts. “We are nearing the point where we are not building any new fossil fuel power plants.”
It will be cheaper to build new solar/wind/batteries than to run on existing coal
Last October, Northern Indiana utility company NIPSCO announced its transition from a 65 percent coal-powered state to projected coal-free status by 2028. Importantly, this decision was made purely on the basis of financials, with an estimated $4 billion in cost savings for customers. The company has already begun several initiatives in solar, wind, and batteries.
NextEra, the largest power generator in the US, has taken on a similar goal, making a deal last year to purchase roughly seven million solar panels from JinkoSolar over four years. Leading power generators across the globe have vocalized a similar economic case for renewable energy.
ICE car sales have now peaked. All car sales growth will be electric
While electric vehicles (EV) have historically been more expensive for consumers than internal combustion engine-powered (ICE) cars, EVs are cheaper to operate and maintain. The yearly cost of operating an EV in the US is about $485, less than half the $1,117 cost of operating a gas-powered vehicle.
And as battery prices continue to shrink, the upfront costs of EVs will decline until a long-term payoff calculation is no longer required to determine which type of car is the better investment. EVs will become the obvious choice.
Many experts including Naam believe that ICE-powered vehicles peaked worldwide in 2018 and will begin to decline over the next five years, as has already been demonstrated in the past five months. At the same time, EVs are expected to quadruple their market share to 1.6 percent this year.
New storage technologies will displace Li-ion batteries for tomorrow’s most demanding applications
Lithium ion batteries have dominated the battery market for decades, but Naam anticipates new storage technologies will take hold for different contexts. Flow batteries, which can collect and store solar and wind power at large scales, will supply city grids. Already, California’s Independent System Operator, the nonprofit that maintains the majority of the state’s power grid, recently installed a flow battery system in San Diego.
Solid-state batteries, which consist of entirely solid electrolytes, will supply mobile devices in cars. A growing body of competitors, including Toyota, BMW, Honda, Hyundai, and Nissan, are already working on developing solid-state battery technology. These types of batteries offer up to six times faster charging periods, three times the energy density, and eight years of added lifespan, compared to lithium ion batteries.
Major advancements in transportation and energy technologies will continue to converge over the next five years. A case in point, Tesla’s recent announcement of its “robotaxi” fleet exemplifies the growing trend towards joint priority of sustainability and autonomy.
On the connectivity front, 5G and next-generation mobile networks will continue to enable the growth of autonomous fleets, many of which will soon run on renewable energy sources. This growth demands important partnerships between energy storage manufacturers, automakers, self-driving tech companies, and ridesharing services.
In the eco-realm, increasingly obvious economic calculi will catalyze consumer adoption of autonomous electric vehicles. In just five years, Naam predicts that self-driving rideshare services will be cheaper than owning a private vehicle for urban residents. And by the same token, plummeting renewable energy costs will make these fuels far more attractive than fossil fuel-derived electricity.
As universally optimized AI systems cut down on traffic, aggregate time spent in vehicles will decimate, while hours in your (or not your) car will be applied to any number of activities as autonomous systems steer the way. All the while, sharing an electric vehicle will cut down not only on your carbon footprint but on the exorbitant costs swallowed by your previous SUV. How will you spend this extra time and money? What new natural resources will fuel your everyday life?
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Convergence is accelerating disruption… everywhere! Exponential technologies are colliding into each other, reinventing products, services, and industries.
In this third installment of my Convergence Catalyzer series, I’ll be synthesizing key insights from my annual entrepreneurs’ mastermind event, Abundance 360. This five-blog series looks at 3D printing, artificial intelligence, VR/AR, energy and transportation, and blockchain.
Today, let’s dive into virtual and augmented reality.
Today’s most prominent tech giants are leaping onto the VR/AR scene, each driving forward new and upcoming product lines. Think: Microsoft’s HoloLens, Facebook’s Oculus, Amazon’s Sumerian, and Google’s Cardboard (Apple plans to release a headset by 2021).
And as plummeting prices meet exponential advancements in VR/AR hardware, this burgeoning disruptor is on its way out of the early adopters’ market and into the majority of consumers’ homes.
My good friend Philip Rosedale is my go-to expert on AR/VR and one of the foremost creators of today’s most cutting-edge virtual worlds. After creating the virtual civilization Second Life in 2013, now populated by almost 1 million active users, Philip went on to co-found High Fidelity, which explores the future of next-generation shared VR.
In just the next five years, he predicts five emerging trends will take hold, together disrupting major players and birthing new ones.
Let’s dive in…
Top 5 Predictions for VR/AR Breakthroughs (2019-2024)
“If you think you kind of understand what’s going on with that tech today, you probably don’t,” says Philip. “We’re still in the middle of landing the airplane of all these new devices.”
(1) Transition from PC-based to standalone mobile VR devices
Historically, VR devices have relied on PC connections, usually involving wires and clunky hardware that restrict a user’s field of motion. However, as VR enters the dematerialization stage, we are about to witness the rapid rise of a standalone and highly mobile VR experience economy.
Oculus Go, the leading standalone mobile VR device on the market, requires only a mobile app for setup and can be transported anywhere with WiFi.
With a consumer audience in mind, the 32GB headset is priced at $200 and shares an app ecosystem with Samsung’s Gear VR. While Google Daydream are also standalone VR devices, they require a docked mobile phone instead of the built-in screen of Oculus Go.
In the AR space, Lenovo’s standalone Microsoft’s HoloLens 2 leads the way in providing tetherless experiences.
Freeing headsets from the constraints of heavy hardware will make VR/AR increasingly interactive and transportable, a seamless add-on whenever, wherever. Within a matter of years, it may be as simple as carrying lightweight VR goggles wherever you go and throwing them on at a moment’s notice.
(2) Wide field-of-view AR displays
Microsoft’s HoloLens 2 leads the AR industry in headset comfort and display quality. The most significant issue with their prior version was the limited rectangular field of view (FOV).
By implementing laser technology to create a microelectromechanical systems (MEMS) display, however, HoloLens 2 can position waveguides in front of users’ eyes, directed by mirrors. Subsequently enlarging images can be accomplished by shifting the angles of these mirrors. Coupled with a 47 pixel per degree resolution, HoloLens 2 has now doubled its predecessor’s FOV. Microsoft anticipates the release of its headset by the end of this year at a $3,500 price point, first targeting businesses and eventually rolling it out to consumers.
Magic Leap provides a similar FOV but with lower resolution than the HoloLens 2. The Meta 2 boasts an even wider 90-degree FOV, but requires a cable attachment. The race to achieve the natural human 120-degree horizontal FOV continues.
“The technology to expand the field of view is going to make those devices much more usable by giving you bigger than a small box to look through,” Rosedale explains.
(3) Mapping of real world to enable persistent AR ‘mirror worlds’
‘Mirror worlds’ are alternative dimensions of reality that can blanket a physical space. While seated in your office, the floor beneath you could dissolve into a calm lake and each desk into a sailboat. In the classroom, mirror worlds would convert pencils into magic wands and tabletops into touch screens.
Pokémon Go provides an introductory glimpse into the mirror world concept and its massive potential to unite people in real action.
To create these mirror worlds, AR headsets must precisely understand the architecture of the surrounding world. Rosedale predicts the scanning accuracy of devices will improve rapidly over the next five years to make these alternate dimensions possible.
(4) 5G mobile devices reduce latency to imperceptible levels
Verizon has already launched 5G networks in Minneapolis and Chicago, compatible with the Moto Z3. Sprint plans to follow with its own 5G launch in May. Samsung, LG, Huawei, and ZTE have all announced upcoming 5G devices.
“5G is rolling out this year and it’s going to materially affect particularly my work, which is making you feel like you’re talking to somebody else directly face to face,” explains Rosedale. “5G is critical because currently the cell devices impose too much delay, so it doesn’t feel real to talk to somebody face to face on these devices.”
To operate seamlessly from anywhere on the planet, standalone VR/AR devices will require a strong 5G network. Enhancing real-time connectivity in VR/AR will transform the communication methods of tomorrow.
(5) Eye-tracking and facial expressions built in for full natural communication
Companies like Pupil Labs and Tobii provide eye tracking hardware add-ons and software to VR/AR headsets. This technology allows for foveated rendering, which renders a given scene in high resolution only in the fovea region, while the peripheral regions appear in lower resolution, conserving processing power.
As seen in the HoloLens 2, eye tracking can also be used to identify users and customize lens widths to provide a comfortable, personalized experience for each individual.
According to Rosedale, “The fundamental opportunity for both VR and AR is to improve human communication.” He points out that current VR/AR headsets miss many of the subtle yet important aspects of communication. Eye movements and microexpressions provide valuable insight into a user’s emotions and desires.
Coupled with emotion-detecting AI software, such as Affectiva, VR/AR devices might soon convey much more richly textured and expressive interactions between any two people, transcending physical boundaries and even language gaps.
As these promising trends begin to transform the market, VR/AR will undoubtedly revolutionize our lives… possibly to the point at which our virtual worlds become just as consequential and enriching as our physical world.
A boon for next-gen education, VR/AR will empower youth and adults alike with holistic learning that incorporates social, emotional, and creative components through visceral experiences, storytelling, and simulation. Traveling to another time, manipulating the insides of a cell, or even designing a new city will become daily phenomena of tomorrow’s classrooms.
In real estate, buyers will increasingly make decisions through virtual tours. Corporate offices might evolve into spaces that only exist in ‘mirror worlds’ or grow virtual duplicates for remote workers.
In healthcare, accuracy of diagnosis will skyrocket, while surgeons gain access to digital aids as they conduct life-saving procedures. Or take manufacturing, wherein training and assembly will become exponentially more efficient as visual cues guide complex tasks.
In the mere matter of a decade, VR and AR will unlock limitless applications for new and converging industries. And as virtual worlds converge with AI, 3D printing, computing advancements and beyond, today’s experience economies will explode in scale and scope. Prepare yourself for the exciting disruption ahead!
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The typical cultural image of a robot—as a steel, chrome, humanoid bucket of bolts—is often far from the reality of cutting-edge robotics research. There are difficulties, both social and technological, in realizing the image of a robot from science fiction—let alone one that can actually help around the house. Often, it’s simply the case that great expense in producing a humanoid robot that can perform dozens of tasks quite badly is less appropriate than producing some other design that’s optimized to a specific situation.
A team of scientists from Brigham Young University has received funding from NASA to investigate an inflatable robot called, improbably, King Louie. The robot was developed by Pneubotics, who have a long track record in the world of soft robotics.
In space, weight is at a premium. The world watched in awe and amusement when Commander Chris Hadfield sang “Space Oddity” from the International Space Station—but launching that guitar into space likely cost around $100,000. A good price for launching payload into outer space is on the order of $10,000 per pound ($22,000/kg).
For that price, it would cost a cool $1.7 million to launch Boston Dynamics’ famous ATLAS robot to the International Space Station, and its bulk would be inconvenient in the cramped living quarters available. By contrast, an inflatable robot like King Louie is substantially lighter and can simply be deflated and folded away when not in use. The robot can be manufactured from cheap, lightweight, and flexible materials, and minor damage is easy to repair.
Inflatable Robots Under Pressure
The concept of inflatable robots is not new: indeed, earlier prototypes of King Louie were exhibited back in 2013 at Google I/O’s After Hours, flailing away at each other in a boxing ring. Sparks might fly in fights between traditional robots, but the aim here was to demonstrate that the robots are passively safe: the soft, inflatable figures won’t accidentally smash delicate items when moving around.
Health and safety regulations form part of the reason why robots don’t work alongside humans more often, but soft robots would be far safer to use in healthcare or around children (whose first instinct, according to BYU’s promotional video, is either to hug or punch King Louie.) It’s also much harder to have nightmarish fantasies about robotic domination with these friendlier softbots: Terminator would’ve been a much shorter franchise if Skynet’s droids were inflatable.
Robotic exoskeletons are increasingly used for physical rehabilitation therapies, as well as for industrial purposes. As countries like Japan seek to care for their aging populations with robots and alleviate the burden on nurses, who suffer from some of the highest rates of back injuries of any profession, soft robots will become increasingly attractive for use in healthcare.
Precision and Proprioception
The main issue is one of control. Rigid, metallic robots may be more expensive and more dangerous, but the simple fact of their rigidity makes it easier to map out and control the precise motions of each of the robot’s limbs, digits, and actuators. Individual motors attached to these rigid robots can allow for a great many degrees of freedom—individual directions in which parts of the robot can move—and precision control.
For example, ATLAS has 28 degrees of freedom, while Shadow’s dexterous robot hand alone has 20. This is much harder to do with an inflatable robot, for precisely the same reasons that make it safer. Without hard and rigid bones, other methods of control must be used.
In the case of King Louie, the robot is made up of many expandable air chambers. An air-compressor changes the pressure levels in these air chambers, allowing them to expand and contract. This harks back to some of the earliest pneumatic automata. Pairs of chambers act antagonistically, like muscles, such that when one chamber “tenses,” another relaxes—allowing King Louie to have, for example, four degrees of freedom in each of its arms.
The robot is also surprisingly strong. Professor Killpack, who works at BYU on the project, estimates that its payload is comparable to other humanoid robots on the market, like Rethink Robotics’ Baxter (RIP).
Proprioception, that sixth sense that allows us to map out and control our own bodies and muscles in fine detail, is being enhanced for a wider range of soft, flexible robots with the use of machine learning algorithms connected to input from a whole host of sensors on the robot’s body.
Part of the reason this is so complicated with soft, flexible robots is that the shape and “map” of the robot’s body can change; that’s the whole point. But this means that every time King Louie is inflated, its body is a slightly different shape; when it becomes deformed, for example due to picking up objects, the shape changes again, and the complex ways in which the fabric can twist and bend are far more difficult to model and sense than the behavior of the rigid metal of King Louie’s hard counterparts. When you’re looking for precision, seemingly-small changes can be the difference between successfully holding an object or dropping it.
Learning to Move
Researchers at BYU are therefore spending a great deal of time on how to control the soft-bot enough to make it comparably useful. One method involves the commercial tracking technology used in the Vive VR system: by moving the game controller, which provides a constant feedback to the robot’s arm, you can control its position. Since the tracking software provides an estimate of the robot’s joint angles and continues to provide feedback until the arm is correctly aligned, this type of feedback method is likely to work regardless of small changes to the robot’s shape.
The other technologies the researchers are looking into for their softbot include arrays of flexible, tactile sensors to place on the softbot’s skin, and minimizing the complex cross-talk between these arrays to get coherent information about the robot’s environment. As with some of the new proprioception research, the project is looking into neural networks as a means of modeling the complicated dynamics—the motion and response to forces—of the softbot. This method relies on large amounts of observational data, mapping how the robot is inflated and how it moves, rather than explicitly understanding and solving the equations that govern its motion—which hopefully means the methods can work even as the robot changes.
There’s still a long way to go before soft and inflatable robots can be controlled sufficiently well to perform all the tasks they might be used for. Ultimately, no one robotic design is likely to be perfect for any situation.
Nevertheless, research like this gives us hope that one day, inflatable robots could be useful tools, or even companions, at which point the advertising slogans write themselves: Don’t let them down, and they won’t let you down!
Image Credit: Brigham Young University. Continue reading →
The robot revolution may not be here quite yet, but our mechanical cousins have made some serious strides. And now some of the leading experts in the field have provided a rundown of what they see as the 10 most exciting recent developments.
Compiled by the editors of the journal Science Robotics, the list includes some of the most impressive original research and innovative commercial products to make a splash in 2018, as well as a couple from 2017 that really changed the game.
1. Boston Dynamics’ Atlas doing parkour
It seems like barely a few months go by without Boston Dynamics rewriting the book on what a robot can and can’t do. Last year they really outdid themselves when they got their Atlas humanoid robot to do parkour, leaping over logs and jumping between wooden crates.
Atlas’s creators have admitted that the videos we see are cherry-picked from multiple attempts, many of which don’t go so well. But they say they’re meant to be inspirational and aspirational rather than an accurate picture of where robotics is today. And combined with the company’s dog-like Spot robot, they are certainly pushing boundaries.
2. Intuitive Surgical’s da Vinci SP platform
Robotic surgery isn’t new, but the technology is improving rapidly. Market leader Intuitive’s da Vinci surgical robot was first cleared by the FDA in 2000, but since then it’s come a long way, with the company now producing three separate systems.
The latest addition is the da Vinci SP (single port) system, which is able to insert three instruments into the body through a single 2.5cm cannula (tube) bringing a whole new meaning to minimally invasive surgery. The system was granted FDA clearance for urological procedures last year, and the company has now started shipping the new system to customers.
3. Soft robot that navigates through growth
Roboticists have long borrowed principles from the animal kingdom, but a new robot design that mimics the way plant tendrils and fungi mycelium move by growing at the tip has really broken the mold on robot navigation.
The editors point out that this is the perfect example of bio-inspired design; the researchers didn’t simply copy nature, they took a general principle and expanded on it. The tube-like robot unfolds from the front as pneumatic pressure is applied, but unlike a plant, it can grow at the speed of an animal walking and can navigate using visual feedback from a camera.
4. 3D printed liquid crystal elastomers for soft robotics
Soft robotics is one of the fastest-growing sub-disciplines in the field, but powering these devices without rigid motors or pumps is an ongoing challenge. A variety of shape-shifting materials have been proposed as potential artificial muscles, including liquid crystal elastomeric actuators.
Harvard engineers have now demonstrated that these materials can be 3D printed using a special ink that allows the designer to easily program in all kinds of unusual shape-shifting abilities. What’s more, their technique produces actuators capable of lifting significantly more weight than previous approaches.
5. Muscle-mimetic, self-healing, and hydraulically amplified actuators
In another effort to find a way to power soft robots, last year researchers at the University of Colorado Boulder designed a series of super low-cost artificial muscles that can lift 200 times their own weight and even heal themselves.
The devices rely on pouches filled with a liquid that makes them contract with the force and speed of mammalian skeletal muscles when a voltage is applied. The most promising for robotics applications is the so-called Peano-HASEL, which features multiple rectangular pouches connected in series that contract linearly, just like real muscle.
6. Self-assembled nanoscale robot from DNA
While you may think of robots as hulking metallic machines, a substantial number of scientists are working on making nanoscale robots out of DNA. And last year German researchers built the first remote-controlled DNA robotic arm.
They created a length of tightly-bound DNA molecules to act as the arm and attached it to a DNA base plate via a flexible joint. Because DNA carries a charge, they were able to get the arm to swivel around like the hand of a clock by applying a voltage and switch direction by reversing that voltage. The hope is that this arm could eventually be used to build materials piece by piece at the nanoscale.
7. DelFly nimble bioinspired robotic flapper
Robotics doesn’t only borrow from biology—sometimes it gives back to it, too. And a new flapping-winged robot designed by Dutch engineers that mimics the humble fruit fly has done just that, by revealing how the animals that inspired it carry out predator-dodging maneuvers.
The lab has been building flapping robots for years, but this time they ditched the airplane-like tail used to control previous incarnations. Instead, they used insect-inspired adjustments to the motions of its twin pairs of flapping wings to hover, pitch, and roll with the agility of a fruit fly. That has provided a useful platform for investigating insect flight dynamics, as well as more practical applications.
8. Soft exosuit wearable robot
Exoskeletons could prevent workplace injuries, help people walk again, and even boost soldiers’ endurance. Strapping on bulky equipment isn’t ideal, though, so researchers at Harvard are working on a soft exoskeleton that combines specially-designed textiles, sensors, and lightweight actuators.
And last year the team made an important breakthrough by combining their novel exoskeleton with a machine-learning algorithm that automatically tunes the device to the user’s particular walking style. Using physiological data, it is able to adjust when and where the device needs to deliver a boost to the user’s natural movements to improve walking efficiency.
9. Universal Robots (UR) e-Series Cobots
Robots in factories are nothing new. The enormous mechanical arms you see in car factories normally have to be kept in cages to prevent them from accidentally crushing people. In recent years there’s been growing interest in “co-bots,” collaborative robots designed to work side-by-side with their human colleagues and even learn from them.
Earlier this year saw the demise of ReThink robotics, the pioneer of the approach. But the simple single arm devices made by Danish firm Universal Robotics are becoming ubiquitous in workshops and warehouses around the world, accounting for about half of global co-bot sales. Last year they released their latest e-Series, with enhanced safety features and force/torque sensing.
10. Sony’s aibo
After a nearly 20-year hiatus, Sony’s robotic dog aibo is back, and it’s had some serious upgrades. As well as a revamp to its appearance, the new robotic pet takes advantage of advances in AI, with improved environmental and command awareness and the ability to develop a unique character based on interactions with its owner.
The editors note that this new context awareness mark the device out as a significant evolution in social robots, which many hope could aid in childhood learning or provide companionship for the elderly.
Image Credit: DelFly Nimble / CC BY – SA 4.0 Continue reading →