The Future of Flight: Morphing Wings

morphing-wingsSince the Wright Brothers developed the world’s first airplane, scientists and aerospace engineers have understood how important airflaps and wing design are to ensuring that a plane is able to achieve lift and land safely. During and after World War II, additional lessons were learned, where the sweep of a wing was found to be central to a plane achieving higher service ceilings and air speed velocities.

Since that time, many notable improvements have been made, but some strictures have remained the same. For example, conventional wings suffer from the problem of being fixed in a single position, which makes some aspects of performance possible but other things extremely difficult. In addition, flaps have remained virtually unchanged over the years, relying on hinged joints that are limited and vulnerable.

flexfoilIn both cases, the answer may lie in flexible and seamless materials, leading to wings that can change shape as needed. Such technology could not only enable better performance, but remove the need for hinges and gears. Towards this end, Michigan-based FlexSys has developed a way to optimize wing aerodynamics with FlexFoil, a seamless variable geometry airfoil system.

In development since 2001, FlexFoil is made from what is described only as “aerospace materials,” and is seamlessly integrated into the trailing edge of the wing. Based on a technology known as “distributed compliance,” the morphing structure integrates actuators and sensors that, according to Flexsys, results in “large deformations in shape morphing with very small strains.”

flexfoil1According to a 2006 paper co-written by mechanical engineer Dr. Sridhar Kota (the FlexFoil’s inventor), the foils are:

optimized to resist deflection under significant external aerodynamic loading and are just as stiff and strong as a conventional flap.

What this translates to in real terms is a tolerance of over 4500 kg (10,000 lbs) in air loads and the ability to distribute pressure more evenly throughout the wing, resulting in less strain in any one area. It is also said to reduce wind noise by up to 40 percent on landing, and to lessen build-up of both ice and debris. But the biggest benefit comes in terms of fuel economy.

flexfoil2When retrofitted onto a wing, FlexFoil can reduce fuel consumption by a claimed 4 to 8 percent, with that number climbing to 12 percent for those wings that are built are the system. What’s more, the technology could be applied to anything that moves relative to a fluid medium, including things like helicopter rotor blades, wind turbine blades, boat rudders, or pump impellers.

FlexFoil was officially introduced to the public this week at the AIAA (American Institute of Aeronautics and Astronautics) SciTech exposition in Washington, DC. Plans call for flight tests to be performed this July at NASA’s Dryden Flight Research Center, where the flaps of a Gulfstream business jet will be replaced with the foils.

Check out this video of the airwing design and what it does here:

morphing-wings1To be fair, this is not the only case of flexible, morphing aircraft in development right now. In fact, NASA has been looking to create a morphing aircraft concept ever since 2001. So far, this has included collaborating with Boeing and the U.S. Air Force to create the Active Aeroelastic Wing (AAW) which was fitted to the F/A-18 Hornet, a multirole combat jet in use with the USAF.

But looking long-term, NASA hopes to create a design for a morphing airplane (pictured above). Known as the 21st Century Aerospace Vehicle, and sometimes nicknamed the Morphing Airplane, the concept includes a variety of smart technologies that could enable inflight configuration changes for optimum flight characteristics, and is an example of biomimetic technology.

morphing-wings2In this case, the biological design being mimicked is that of a bird. Through the use of smart materials that are flexible and can change their shape on command, the 21st Century Aerospace Vehicle is able to shape its wings by extending the tips out and slightly upward to give it optimal lift capability. In this configuration, the inspiration for the aircraft’s wings is most clear (pictured above).

But once airborne, the aircraft needs a wing that is capable of producing less wind resistance while still maintaining lift. This is why the wings, upon reaching and service ceilings in excess of 3000 meters (10,000 feet), the wings then contract inward and sweep back to minimize drag and increase airspeed velocity.
Though this program has yet to bear fruit, it is an exciting proposal, and provides a glimpse of the future.

Be sure to check out NASA’s video of the CAV too, and keep your eyes on the skies. Chances are, jets that utilize smart, morphing surfaces are going to be there soon!


Sources:
gizmag.com
, flexsys.com, nasa.gov

The Future is Here: 4-D Printing

4dprintingmaterial3-D printing has already triggered a revolution in manufacturing by allowing people to determine the length, width and depth of an object that they want to create. But thanks to research being conducted at the University of Colorado, Boulder, a fourth dimension can now be included – time. Might sounds like science fiction, until you realize that the new manufacturing process will make it possible to print objects that change their shape at a given time.

Led by Prof. H. Jerry Qi, the scientific team have developed a “4D printing” process in which shape-memory polymer fibers are deposited in key areas of a composite material item as it’s being printed. By carefully controlling factors such as the location and orientation of the fibers, those areas of the item will fold, stretch, curl or twist in a predictable fashion when exposed to a stimulus such as water, heat or mechanical pressure.

4dprintingmaterial1The concept was proposed earlier this year by MIT’s Skylar Tibbits, who used his own 4D printing process to create a variety of small self-assembling objects. Martin L. Dunn of the Singapore University of Technology and Design, who collaborated with Qi on the latest research, explained the process:

We advanced this concept by creating composite materials that can morph into several different, complicated shapes based on a different physical mechanism.

This means that one 4D-printed object could change shape in different ways, depending on the type of stimulus to which it was exposed. That functionality could make it possible to print a photovoltaic panel in a flat shape, expose it to water to cause it to fold up for shipping, and then expose it to heat to make it fold out to yet another shape that’s optimal for catching sunlight.

4dprintingmaterial2This principle may sound familiar, as it is the basis of such sci-fi concepts as polymorphic alloys or objects. It’s also the idea behind the Milli-Motein, the shape-shifting machine invented by MITs Media Labs late last year. But ultimately, it all comes back to organic biology, using structural biochemistry and the protein cell as a blueprint to create machinery made of “smart” materials.

The building block of all life, proteins can assume an untold number of shapes to fulfill an organism’s various functions, and are the universal workforce to all of life. By combining that concept with the world of robotics and manufactured products, we could be embarking upon an era of matter and products that can assume different shapes as needed and on command.

papertab-touchAnd if these materials can be scaled to the microscopic level, and equipped with tiny computers, the range of functions they will be able to do will truly stagger the mind. Imagine furniture made from materials that can automatically respond to changes in pressure and weight distribution. Or paper that is capable of absorbing your pencil scratches and then storing it in its memory, or calling up image displays like a laptop computer?

And let’s not forget how intrinsic this is to the field of nanotechnology. Smarter, more independent materials that can change shape and respond to changes in their environment, mainly so they can handle different tasks, is all part of the Fabrication Revolution that is expected to explode this century. Here’s hoping I’m alive to see it all. Sheldon Cooper isn’t the only one waiting on the Technological Singularity!

Source: gizmag.com

Towards a Cleaner Future: The Cactus-Inspired Oil Skin

???Oil spills are a very difficult problem. In addition to being catastrophic to the local environment, they are also incredibly difficult to clean up. After a spill occurs, some always stays on the surface while the rest forms heavy droplets and sink downwards, either becoming suspended in the water or falling to the bottom. Getting at these bits of the slick is difficult, and current methods are neither cost effective nor environmentally friendly themselves.

For example, the containment booms and chemical dispersants that BP used after the Deepwater Horizon spill were highly ineffective, as anyone who followed the news of the spill will recall. Because of that disaster, and others besides, numerous solutions have been proposed to deal with spills in the future – ranging from filters, to tiny submarines, and oil-eating bacteria.

artificial_cactusBut most recently, a group of researchers from the Chinese Academy of Sciences have suggested a nature-inspired solution. Their concept calls for droplet-collecting “skins” modeled after cactus plants. In the desert, these pants collect moisture when condensation covers the tips of their spines and then falls under its own weight to the base and gets absorbed by the plant.

Working from this, the Chinese researchers created their own “cactus skin” – artificial cone-shaped needles made of copper and coated in silicone that. When submerged in water, the half-millimeter spikes draw down oil droplets and collect them at the bottom. According to the researchers, the method is good for 99% of oil-water mixes and works with several types of oil.

chinese_academy_of_scienceThe research appeared in the latest issue of the journal Nature Communications. According to the paper:

Underwater, these structures mimic cacti and can capture micron-sized oil droplets and continuously transport them towards the base of the conical needles. Materials with this structure show obvious advantages in micron-sized oil collection with high continuity and high throughput.

The researchers think the device could also be used in the open air to remove fine droplets released with sprays. This way, they would be able to neutralize a good portion of oil released by malfunctioning rigs before it began polluting our oceans and waterways. On top of that, research at the Academy, specifically in the Institute of Chemistry, has revealed that this same concept might provide a solution to the problem of city pollution.

Between all of this, we could be seeing artificial cactuses in city environments very soon. Just not as potted plants and in the desert! And it does say much about our biomimetic future, where we are becoming increasingly dependent on solutions born of nature to solve our environmental problems.

Sources: fastcoexist.com, inhabitat.com, scmp.com

The Future of Cities and Urban Planning

future-city-1With the development of vertical farms, carbon capture technology, clean energy and arcologies, the future of city life and urban planning is likely to be much different than it does today. Using current trends, there are a number of people who are determined to gain some understanding of what that might look like. One such group is Arup, a design and engineering firm that produced a mockup that visualizes what urban environments will look like in 2050.

Based on the world as it is today, certain facts about the future seem relatively certain. For starters, three-quarters of the population will live in cities, or 6.75 billion of the projected 9 billion global total. In addition, everyone will have grown up with the Internet, and its successors, and city residents will have access to less natural resources than they do today, making regeneration and efficiency more of a priority.

Add to this several emerging technologies, and our urban environments are likely to look something like the building mockup below. As you can see, it has its own energy systems (“micro-wind,” “solar PV paint,” and “algae facade” for producing biofuels). There is an integrated layer for meat, poultry, fish, and vegetable farming, a “building membrane” that converts CO2 to oxygen, heat recovery surfaces, materials that phase change and repair themselves, integration with the rest of the city, and much more.

future_urban_planning

Most futuristic of all is the fact that the structure is completely modular and designed to be shifted about (by robots, of course). The building has three layer types, with different life-spans. At the bottom is a permanent layer – with a 10 to 20-year lifespan – which includes the “facade and primary fit-out walls, finishes, or on-floor mechanical plant” – and a third layer that can incorporate rapid changes, such as new IT equipment.

As Arup’s Josef Hargrave described the building when unveiling the design:

[A]ble to make informed and calculated decisions based on their surrounding environment… [a] living and breathing [structure] able to support the cities and people of tomorrow.

In short, the building is designed with personal needs in mind, based on information gleamed from a person’s behaviors, stated preferences, and even genetic information.

aircleaning_skyscraper3But what is even more interesting is how these buildings will be constructed. As countless developments are made in the field of robotics, biotechnology and nanotechnology, both the materials used and the processes involved are likely to be radically different. The rigid construction that we are used to is likely to give way to buildings which are far more flexible, adaptive, and – best of all – built by robots, drones, tiny machines and bacteria cultures.

Once again, this change is due mainly to the pressures that are being placed on urban environments, and not just technological advances. As our world becomes even more densely populated, greater proportions of people live in urban environments, and resources become more constrained, the way we build our cities must offer optimum efficiency with minimal impact.

nanomachineryTowards this end, innovations in additive manufacturing, synthetic biology, swarm robotics, and architecture suggest a future scenario when buildings may be designed using libraries of biological templates and constructed with biosynthetic materials able to sense and adapt to their conditions.

What this means is that cities could be grown, or assembled at the atomic level, forming buildings that are either living creatures themselves, or composed of self-replicated machines that can adapt and change as needed. Might sound like science fiction, but countless firms and labs are working towards this very thing every day.

It has already been demonstrated that single cells are capable of being programmed to carry out computational operations, and that DNA strains are capable of being arranged to carry out specialized functions. Given the rapid progress in the field of biotech and biomimetics (technology that imitates biology), a future where the built environment imitates organic life seems just around the corner.

biofabrication For example, at Harvard there is a biotech research outfit known as Robobees that is working on a concept known as “programming group dynamics”. Like corals, beehives, and termite colonies, there’s a scalar effect gained from coordinating large numbers of simple agents to perform complex goals. Towards this end, Robobees has been working towards the creation of robotic insects that exhibit the swarming behaviors of bees.

Mike Rubenstein leads another Harvard lab, known as Kilobot, which is dedicated to creating a “low cost scalable robot system for demonstrating collective behaviors.” His lab, along with the work of researcher’s like Nancy Lynch at MIT, are laying the frameworks for asynchronous distributed networks and multi-agent coordination, aka swarm robotics, that would also be capable of erecting large structures thanks to centralized, hive-mind programming.

nanorobot1

In addition to MIT, Caltech, and various academic research departments, there are also scores of private firms and DIY labs looking to make things happen. For example, the companies Autodesk Research and Organovo recently announced a partnership where they will be combining their resources – modelling the microscopic organic world and building bioprinters – to begin biofabricating everything from drugs to nanomachines.

And then there are outfits like the Columbia Living Architecture Lab, a group that explores ways to integrate biology into architecture. Their recent work investigates bacterial manufacturing, the genetic modification of bacteria to create durable materials. Envisioning a future where bacterial colonies are designed to print novel materials at scale, they see buildings wrapped in seamless, responsive, bio-electronic envelopes.

ESA_moonbaseAnd let’s not forget 3D printing, a possibility which is being explored by NASA and the European Space Agency as the means to create a settlement on the Moon. In the case of the ESA, they have partnered with roboticist Enrico Dini, who created a 3-D printer large enough to print houses from sand. Using his concept, the ESA hopes to do the same thing using regolith – aka. moon dust – to build structures on Earth’s only satellite.

All of these projects are brewing in university and corporate labs, but it’s likely that there are far more of them sprouting in DIY labs and skunkworks all across the globe. And in the end, each of them is dedicated to the efficiency of natural systems, and their realization through biomimetic technology. And given that the future is likely to be characterized by resources shortages, environmental degradation and the need for security, it is likely to assume that all of these areas of study are likely to produce some very interesting scenarios.

As I’ve said many times before, the future is likely to be a very interesting place, thanks to the convergence of both Climate Change and technological change. With so many advances promising a future of post-scarcity, post-mortality, a means of production and a level of control over our environment which is nothing short of mind-boggling – and a history of environmental degradation and resource depletion that promises shortages, scarcity, and some frightening prospects – our living spaces are likely to change drastically.

The 21st century is going to be a very interesting time, people. Let’s just hope we make it out alive!

Sources: fastcoexist.com, (2)