Special Coverage

Self-Healing Wire Insulation
Thermomechanical Methodology for Stabilizing Shape Memory Alloy (SMA) Response
Space Optical Communications Using Laser Beams
High Field Superconducting Magnets
Active Response Gravity Offload and Method
Strat-X
Sonar Inspection Robot System
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Coming Soon - Technical Webinar Series from the Editors of SAE: Advanced Emissions Strategies

In Conjunction with SAE No one ever claimed, or dared believe, that Tier 4 Final was final. Stage V emissions regulations in Europe already have been announced, and some industry insiders expect the U.S. EPA to implement a Tier 5 in the next few years. This 60-minute Webinar will take us from where we were in terms of the major advances in emissions solutions over the past couple of years, to where panelist experts think we need to be, and what will get us there. Topics can range from the latest in advanced combustion and emissions control, to alternative power solutions, to advances in materials, simulation tools, and sealing technologies.

Posted in: Upcoming Webinars

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Coming Soon - Pumped Two Phase Cooling: The Advanced Thermal Management Solution for Emerging High Power Electronics Applications

As the demand for higher power in lighter, smaller packages continues to increase, so does the need for a more advanced thermal management solution. Designs that once utilized the cooling capabilities of a pumped liquid system have now surpassed their failure threshold.

Posted in: Upcoming Webinars

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Coming Soon - Technical Webinar Series from the Editors of SAE – Lightweighting: Defining the Next Phase

In Conjunction with SAE Much of automotive lightweighting’s low-hanging fruit has been exploited. This SAE Webinar examines what new materials, as well as design and manufacturing innovations, will advance lightweighting to the next phase, where gains are expected to be tougher and potentially more expensive. Aluminum has been the assumed overall “winner” for lightweighting’s future, but fast-moving innovation from the steel and composites sectors is making the materials-choice matrix more complex and opportunity-laden.

Posted in: Upcoming Webinars

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Residual Mode Filters

NASA has developed a unique control algorithm and synthesis method that uses a system’s output to modify control inputs to cause the system to track a reference model or a fixed value in the presence of unmodeled system dynamics, varying operating environments, and unpredictable disturbances. The unique feature of this algorithm is the ability to instantaneously adapt the system according to its output, rejecting persistent disturbances, and ultimately improving the system’s performance. This makes the controller ideally suited for applications where there are unknown modeling parameters or uncertain operating environments. Many aerospace systems must function in unknown or highly variable environments. This technology allows the system to achieve its objectives in these types of unpredictable environments. In comparison to current adaptive controller technologies, the addition of residual mode filters allows operation when flexible modes are present that could inhibit the controller. This is especially useful for systems where initial modeling is costly, or the fidelity of existing system models is low.

Posted in: Briefs, Machinery & Automation

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Development of a Metallic Bilayer Liftoff Mask

A large variety of cryogenic detectors need to be fabricated on thin dielectric membranes in order to have high signal-to-noise attributes. Unfortunately, many of the etching processes used to define the detectors can roughen or even completely dissolve the membranes. These types of membrane damage degrade the detector performance and limit fabrication yield.

Posted in: Briefs, Electronics & Computers

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Self-Healing Wire Insulation

Microcapsules release healant that repairs minor cuts, nicks, and abrasions. NASA’s Kennedy Space Center is seeking commercial partners for licensing or further development of a novel high-performance, flexible, low-melt polyimide film with self-healing properties. The self-healing properties of the film are provided by embedded microcapsules containing a solvent-soluble polyimide. When cut or otherwise damaged, these capsules release their contents, which dissolve and heal the damaged area.

Posted in: Briefs, Electronics & Computers

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Compact Vibration Damper

Do you have a need to reduce vibration in high performance structures? Then, you’ll want to attend this NASA Tech Briefs Webinar!NASA Langley Research Center has developed a compact tuned damper that reduces vibration occurring at a fixed frequency. Structural vibrations frequently need to be damped to prevent damage to a structure. Tuned dampers reduce vibration of the base structure by the dissipation of energy. The magnitude of the dissipated energy is proportional to the square of the displacement or velocity of the tuned mass, which in turn is proportional to the range of motion.

Posted in: On-Demand Webinars

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