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Decelerator System Simulation (DSS)

Lyndon B. Johnson Space Center, Houston, Texas The Crew Exploration Vehicle Parachute Assembly System (CPAS) project conducts computer simulations to verify that requirements on flight performance, parachute loads, and terminal rate of descent are met. The objective of this work was to obtain a high-fidelity simulation of Orion crew capsule flight test vehicles during parachute flight.

Posted in: Briefs, TSP

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EXOS Software

Lyndon B. Johnson Space Center, Houston, Texas An improved version of EXOS software allows for the modeling of fabrics, mixtures, and porous materials, and also provides the ability to accept hex mesh geometries. The code employs a novel numerical method, a hybrid particle finite element approach, as well as particles and elements in tandem, each modeling distinct aspects of the physics. Ellipsoidal particles are used to model contact-impact and volumetric thermomechanical response (Euler parameters provide a singularity-free description of particle rotations). Elements are used to model “strength” effects; namely, tensile inter-particle forces and elastic-plastic deviatoric deformation.

Posted in: Briefs, TSP, Electronics & Computers, Coatings & Adhesives

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Wireless Multi-Walled Carbon Nanotube Microwave Heater System Using RFID-Based Temperature Feedback

This heater can be used in condensation control in inflatable structures, or in aircraft de-icing. Lyndon B. Johnson Space Center, Houston, Texas This innovation has two main parts — a wireless, flexible film heater containing multi-walled carbon nanotubes (MWCNTs) to convert radiated microwave energy into heat, and a radio frequency identification (RFID) temperature sensor to provide wireless temperature feedback.

Posted in: Briefs, TSP, Sensors

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Sub-Audible Speech Recognition Based on Electromyographic (EMG) Signals

This technology can be used by medical and emergency service workers, persons with disabilities, and in homeland security, underwater operations, and robotic control. Ames Research Center, Moffett Field, California Sub-audible speech is a new form of human communication that uses tiny neural impulses (EMG signals) in the human vocal tract instead of audible sounds. These EMG signals arise from commands sent by the brain’s speech center to tongue and larynx muscles that enable production of audible sounds. Sub-audible speech arises from EMG signals intercepted before an audible sound is produced and, in many instances, allows inference of the corresponding word or sound. Where sub-audible speech is received and appropriately processed, production of recognizable sounds is no longer important. Further, the presence of noise and of intelligibility barriers, such as accents associated with the audible speech, no longer hinder communication.

Posted in: Briefs, Sensors

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Precision Detector Conductance Definition via Ballistic Thermal Transport

This innovation could be applied in the development of bolometric detector array sensors. Goddard Space Flight Center, Greenbelt, Maryland The characteristics of a thermal detector, such as sensitivity, response time, and saturation power (or energy resolution), are functions of the thermal conductance of the detector to its cryogenic environment. The thermal conductance is specified to achieve a tradeoff among the highest sensitivity, allowed response time, and the desired saturation energy or power budget for the particular application. It is essential to achieve the design thermal conductance (within an acceptable variance) after a thermal detector has been fabricated. Otherwise, the detector will fail to achieve its desired functionality. In addition, the formation of a multi-pixel imaging array becomes difficult and costly when the design thermal conductance is not achieved with high post-fabrication yield.

Posted in: Briefs, TSP, Sensors

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Basics of Electric Heaters

Hotwatt has manufactured specialized electric heating elements for over 64 years, all made in the USA. Products include cartridge, air process, immersion, strip and finned strip, tubular and finned tubular, band, compressor crankcase, foil, flexible rope and ceramic heaters. We are a quality supplier to OEM's in the in industrial, medical, commercial appliance, packaging, instrumentation, aviation, transportation and military fields.

Posted in: White Papers, White Papers, Electronics

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Getting Started with Medical Device Security: Top Ten Steps to Take Today

In this Webinar, we will discuss some of the goals and challenges of medical device security today. After reviewing some foundational concepts, we will explore the Top Ten Steps that a medical device manufacturing company can take today to start enhancing the security of their medical devices.

Posted in: Webinars, On-Demand Webinars

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