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Products of Tomorrow: April 2015

The technologies NASA develops don’t just blast off into space. They also improve our lives here on Earth. Life-saving search-and-rescue tools, implantable medical devices, advances in commercial aircraft safety, increased accuracy in weather forecasting, and the miniature cameras in our cellphones are just some of the examples of NASA-developed technology used in products today. This column presents technologies that have applications in commercial areas, possibly creating the products of tomorrow. If you are interested in licensing the technologies described here, use the contact information provided. To learn about more available technologies, visit the NASA Technology Transfer Portal at http://technology.nasa.gov.

Posted in: Articles, Products, Consumer Product Manufacturing, Joining & Assembly, Optical Components, Optics

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Reducing Interconnection Weight in Autosports

In Formula 1 and other autosports, weight reduction is critical to competitive advantage. A few grams saved here and a few more saved there can add up to significant savings. There is also a move toward high-density packaging of electronics parts. As the electronics content of cars increases, the natural drive is to miniaturize the package to gain maximum efficiency in the use of space.

Posted in: Articles, Electronic Components, Electronics, Composites, Fiber Optics

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SAE 2015 World Congress Preview

Leading Mobility Innovation The SAE World Congress, presented by SAE International, assembles the best talent in the automotive industry. Experts, management teams, engineers, and executives gather to collaborate and address current challenges, and seek new opportunities for discovery and exploration. The theme of the 2015 World Congress — held in Detroit from April 21-23 — is Leading Mobility Innovation, and challenges engineers to create mobility for the future through innovative technologies.

Posted in: Articles, Automotive

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Precision Measurement and Inspection Ensure Quality of SLS Rocket Panels

Reverse engineering and inspection software Verisurf Software Anaheim, CA 714-970-1683 www.verisurf.com In spaceflight, the first eight minutes are critical. This is when the greatest opposing forces of thrust and gravity are impacting the launch vehicle. The new NASA Space Launch System (SLS) will weigh 5.5 million pounds at liftoff, or roughly the weight of eight fully loaded 747 jets. Everything comes down to weight and the integrity of design and fabrication to insure success. Today, it costs $10,000 to send one pound of payload into orbit; since the entire launch vehicle makes the trip to low-Earth orbit, its net weight is a big consideration. The lighter the launch vehicle, the greater the payload can be.

Posted in: Application Briefs, Articles, Lasers & Laser Systems, Computer-Aided Manufacturing (CAM), Mathematical/Scientific Software

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Magnetic Fluids Deliver Better Speaker Sound Quality

NASA’s liquid magnetization technology helps Sony increase sound amplitude while reducing distortion. In the early 1960s, NASA scientists were trying to move fuel into an engine without the benefit of gravity. A scientist at Lewis Research Center (now Glenn Research Center) came up with the idea to magnetize the liquid with extremely fine particles of iron oxide. That way, fuel could be drawn into the engine using magnetic force.

Posted in: Articles, Electronics, Joining & Assembly

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An Operationally Based Vision Assessment Simulator for Domes

Applications include remote visualization, flight simulation, virtual environments, and planetariums. Ames Research Center, Moffett Field, California The work described here is part of the U.S. Air Force-sponsored Operational Based Vision Assessment (OBVA) program that has been tasked with developing a high-fidelity flight simulation laboratory to determine the relationship between human vision and performance in simulated operationally relevant tasks. The OBVA simulator was designed and built to provide the Air Force School of Aerospace Medicine (USAFSAM) with a scientific testing laboratory to study human vision and testing standards.

Posted in: Briefs, Computers, Simulation Software

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Ad Hoc Adaptive Pitch Axis Pilot Model

Neil A. Armstrong Flight Research Center, Edwards, California Flight research has shown that adaptive flight control systems can be susceptible to adverse pilot-controller interactions, including pilot-in-the-loop oscillations (PIO). Conventional PIO analysis is performed using a static pilot model and a linear, time-invariant model of the aircraft and its control system. For aircraft with time-varying dynamics such as damage or failure, pilot technique may change rapidly to maintain control. An adaptive pilot model can be used to evaluate potential interactions between the pilot and an adaptive flight controller. An ad hoc algorithm was designed for the real-time adaptation of a pilot model describing a pitch angle gross acquisition task. The pilot model consists of an adaptive gain and a fixed time delay. The adaptive gain is adjusted based on the magnitude of the tracking error and the aggressiveness of the response. The algorithm was shown to match human pilot adaptation (simulation) to changes in dynamics including nominal, increased, and decreased loop gain; increased and decreased damping; and increased and decreased natural frequency. The algorithm also exhibits the classic pilot crossover theory response of –20dB/dec@0dB. Unique features of the pilot model are: Continuous adaptations in which gain adjustments are updated continuously and naturally converge to a solution when the aircraft dynamics are time-invariant. Bidirectional adaptation in which the pilot gain increases or decreases as required. Explicit modeling of the pilot’s ability to phase-correlate command/response. Adaptation is normalized to be proportional to the piloting task. This work was done by Curt Hanson of Armstrong Flight Research Center. For more information, contact the Armstrong Technology Transfer Office at 661-276-3967. DRC-012-007

Posted in: Briefs, Aviation

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