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Domain: design-engineering.com
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Stories · 12
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NASA's JPL Develops Multi-Metal 3D Printing Process
yyzmcleod (1534129) writes The technology to 3D print a single part from multiple materials has been around for years, but only for polymer-based additive manufacturing processes. For metals, jobs are typically confined to a single powdered base metal or alloy per object. However, researchers at NASA's Jet Propulsion Laboratory say they have developed a 3D printing technique that allows for print jobs to transition from one metal to another in a single object. From the article: In JPL’s technique, the build material’s composition is gradually transitioned as the print progresses. For example, the powdered build material might contain 97 percent titanium alloy and 3 percent stainless steel at the beginning of the transition. Then, in 1 percent increments between layers, the gradient progresses to 97 percent stainless steel and 3 percent Ti alloy by some defined point in the overall 3D printing process. -
Festo's Drone Dragonfly Takes To the Air
yyzmcleod writes "Building on the work of last year's bionic creation, the Smart Bird, Festo announced that it will literally launch its latest creation, the BionicOpter, at Hannover Messe in April. With a wingspan of 63 cm and weighing in at 175 grams, the robotic dragonfly mimics all forms of flight as its natural counterpart, including hover, glide and maneuvering in all directions. This is made possible, the company says, by the BionicOpter's ability to move each of its four wings independently, as well as control their amplitude, frequency and angle of attack. Including its actuated head and body, the robot exhibits 13 degrees of freedom, which allows it to rapidly accelerate, decelerate, turn and fly backwards." -
Researchers Create Life-sized 3D Hologram For Videoconferencing
yyzmcleod writes with this excerpt: "A research team at Queen's University has created a human-scale 3D hologram pod that allows people in different locations to videoconference as if they are standing in front of each other. Called TeleHuman, the technology is the creation of professor Roel Vertegaal, director of the Human Media Lab, and his graduate team at the Queen's University in Kingston, Ontario. Similar to the Star Trek holodeck, participants can walk around the 3D hologram of the remote person they're talking to and view them from all sides. More importantly, the system captures 3D visual cues that 2D video miss, such as head orientation, gaze and overall body posture." -
Engineering the 30-Meter Telescope
yyzmcleod writes "When completed in 2018, the Thirty Meter Telescope (TMT) will be the world's largest and most powerful, with a resolving power 100 times that of Hubble. As TMT's preliminary design review nears, this article details how its enclosure, segmented mirror and adaptive optics will work to let astronomers peer back to the beginning of the Cosmos." -
Sink Your Balls Quickly With Pool-Cue Robots
AndreV writes "In another attempt to dehumanize our bar games, a Canadian engineer has turned the classic game of billiards on its head with his BilliardBots pet project, which consists of a series of remote-controlled mobile robots meant to replace the standard cue sticks normally used to pocket pool balls. While in his version the basic rules remain, unlike regular billiards, players in this version simultaneously rush to pocket their designated balls (they don't take turns), 'thus it's very competitive and fast,' the creator says. In order to keep tight reins on the mechatronic ball handlers' movements, he adapted a pair of Playstation controllers and says that playing 'requires dexterity, like a video game,' to control their 3.5-m/sec-maximum speeds. The 'bots are designed simply but effectively, using a 3-by-3-by-3-inch metal frame with an electronic board, two motors and rechargeable battery packs. Using a Bluetooth wireless communication protocol, its commands come from the wireless controller with single or double joystick selectable control (the other buttons are not used). Its other parameters are software programmable, such as maximum acceleration rate, maximum speed and maximum rotation speed." -
Robo-Arm Signatures Are Legal, Gov't Buys One
AndreV writes "It's endlessly comforting to know a recently designed and implemented long-distance robotic signing arm can produce signatures legal in both the US and Canada. The aptly named LongPen replicates the handwriting from a person writing in a remote location — with the unique speed, cadence and pressure of a human pen-stroke. It started as an idea from author Margaret Atwood to help free her from grueling, multi-city, multi-country book tours, but the hard stuff was done by a bunch of Canadian haptic gurus, whose design took into consideration many factors of the human arm and how we write. How it works: from the author-end, data protocols are set up, and the pen pressure is measured on a special tablet. The data streams to the robot, while algorithms smooth out all the missed points. Complex math operations were used to help the mechatronic limb repeat the hand's motions without unnecessary jerking, and programmers had to 'scale time' or 'stretch time' by breaking down the movements, essentially tricking the eyes into thinking the robot is writing fast. It was recently adopted by the Ontario Government to sign official documents. It helps criminals sign books, too." -
Flying Micro-Robot Takes Off
AndreV writes "A University of Waterloo in Ontario engineering research team has developed the world's first flying micro-robot capable of manipulating objects for micro-scale applications, which include micro-assembly of mechanical components, handling of biological samples and even microsurgery. It moves around and manipulates objects with micro-grippers, remotely controlled by a laser-focusing beam (heating the pincers with a laser opens them; when the laser is turned off, they cool and close). Its magnetic drive mechanism controls the field using continuous feedback from positioning sensors in order to position the 'bot. 'It can enter virtually any space and can be operated in a sealed enclosure by a person outside,' the project leaders says, 'which makes it useful for handling bio-hazardous materials or working in vacuum chambers and clean rooms.' The video of the contraption shows it floating in mid-air." -
NASA's Zero-Gravity Robotic-Arm Partnership With Canada
AndreV writes "We've entered into an extraterrestrial quid pro quo with our Northern neighbors: After celebrating 25 years of the Canadarm's first venture into space, NASA has reached out (so to speak) to the Canadian Space Agency and begun research and development on a new generation of robotic arms, which would ultimately be used for the US agency's Orion Crew Exploration Vehicle that will provide transportation for Moon missions and jaunts to the international space station. In exchange, Canada will trade the robotic-limb technology's use on Orion and other future US-manned spacecraft for flight time for Canadian astronauts. And seeing solid results shouldn't be far off — the engineering company designing the bionic branch, responsible for the previous Canadarms, has already begun investigating the effects of zero gravity on their components. (Another forward-looking project being bartered for astronaut time is a rover for the Moon and Mars.) Fair trade?" -
Gecko-Inspired Dry Adhesive Set For Space
AndreV writes "Biomimetic adhesives aren't new, but a PhD graduate in British Columbia has developed a new method of creating microscopic, mushroom-like plastic structures in order to produce a dry adhesive that mimics the stickiness of gecko feet—and is prepping his glue-free innovation for outer space. A research group at his university, in collaboration with the European Space Agency, is engineering a spider-like, sticky-footed climbing robot destined to explore Mars, and it is also developing reusable attaching systems for astronauts to use where magnetic and suction systems generally fail. In the future, he says, single-use versions could be used in any number of medical applications as well as for replacements for everyday sticky needs, such as Post-It notes and Scotch tape." -
Leg-Paralysis Sensing, Stimulation Device Steps Up
AndreV writes "After 30 years of development, a device developed at Simon Fraser University that assists people to walk who have paralysis in one leg will soon be on the market in Europe and, eventually, in the US and Canada. The pacemaker-like Neurostep uses nerve cuffs to sense and stimulate nerve activity in the paralyzed leg, allowing greater mobility for those suffering from neurological disabilities such as stroke, multiple sclerosis, spinal cord injury, or cerebral palsy. About the size of a cell phone, the 'brain' integrates three digital modules: the neurosensing module (receives nerve impulses), real-time adaptive control module (interrogates the signals and identifies physical events), and neurostimulation module (delivers stimulation to the target nerve). It was recently approved for use in Europe, and they are working to begin clinical trials and introduce the device in the US." -
Design Software Giants Target the Unemployed
avishere writes "People are losing their jobs, but for some execs the economic meltdown seems like the perfect time to get their software into the hands of those who can't afford their multi-thousand-dollar price tags. Software giants Autodesk and SolidWorks have each latched onto the worst-economic-disaster-since-the-Great-Depression meme and released free versions of their flagship computer-aided-design brands before their potential users are forced to sell their laptops on Craigslist. 'In these uncertain economic times,' Autodesk coos sympathetically, it will give away temporary licenses of AutoCAD and other software to those unemployed in the fields of architecture, engineering, and design. (They are also developing a Mac version, two decades after abandoning the platform.) SolidWorks was quick to respond with its subtly titled Engineering Stimulus Package. So if anyone out there has their weekdays free, jumpstart your hardware and design projects for cheap. Legally, too." -
Engineering Students Build Robotic Foosball Players
Andre writes "As their final-year project, an eight-man team of fourth-year electrical and computer-engineering students at the University of Waterloo in Ontario, Canada, constructed a robot-controlled, motor-and-actuator foosball table capable of playing against human opponents in a two-on-two fashion; one mechanical player controls two defensive rods (goalies and full-backs) and the other controls two offensive rods (half-backs and forwards). They considered the computers 'medium-skilled' players in that they were very competitive against beginners and fairly competitive against intermediates."