Keyword: Failure modes and effects analysis

Application Briefs: Test & Measurement
Learn how to outfit your equipment with sensors.
Technology Leaders: Aerospace
Aircraft may have a huge amount of data available, but this doesn’t mean it’s the right data to troubleshoot a problem.
Articles: Motion Control

For most electrical engineers, the simple term “motor” means one thing: an electromagnetic rotary-motion unit. Engineers who need linear rather than rotary motion consider adding a mechanical...

Application Briefs: Aerospace
Collier Research Corp.
Newport News, VA
HyperSizer.com

When the Stratolaunch aircraft rolled out of the Mojave, CA Air and Space Port hangar this spring in...

Briefs: Mechanical & Fluid Systems

This technology is designed to protect against leaks in solenoid, check, manual, and relief valves, as well as disconnects and regulators.

NASA’s Marshall Space Flight Center has developed a new,...

Articles: Mechanical & Fluid Systems

We use touch, the dominant user interface for years, to tap keyboards on laptops and tablets, to communicate with our car’s portable GPS, and to text friends and take photos from our...

Briefs: Software
Extended Testability Analysis (ETA) Tool V8.0

An assessment of a system’s safety requirements is required early in the design process when cost and time impacts are minimal. These requirements include fault detection, failure isolation, and failure recovery. Systems engineering groups at NASA have been exploring model-based products to better...

Briefs: Test & Measurement

A key goal of NASA’s aeronautics research is to help the aircraft industry transition to low-carbon propulsion. Many potential power architectures for electric...

Briefs: Mechanical & Fluid Systems
Ultra-Compact Heat Rejection System

Radiator panels are the baseline heat rejection approach for most space systems. This approach is sound, but requires a large amount of surface area to radiate the anticipated heat load. The large panels require support structures to hold them in place and prevent damage. These structures impact mass and cost....

Briefs: Mechanical & Fluid Systems
Variable-Aperture Reciprocating Reed Valve

NASA’s Marshall Space Flight Center engineers have developed a new reed valve for controlling fluid flow back and forth between two chambers. The VARR valve provides two-way flow that is proportional to flow demand. As the pressure gradient builds on one side, the reed valve responds by opening an...

Briefs: Mechanical & Fluid Systems
Design Support and Analysis Tool for Pyrotechnically Actuated Valves

This software predicts flow through the initiator of a Primer Chamber Assembly Valve. These valves exhibited a potential failure mode for specific operating conditions where dual simultaneous firings of the initiator occurred. The software tool was able to identify a fluid...

Briefs: Information Technology
Software Tools for Fault Management Technologies

Several key areas of improvement in effect design, development, verification, and validation of fault management processes have been identified in NASA’s Fault Management Handbook. The majority of these guidelines are focused on making the modeling tools more user friendly and reducing the...

Briefs: Aerospace
Timed Injection of Simulation Data via Redundant Network Ports in Time Triggered Ethernet (TTE) Systems

Vehicle-scale integration and test requires closed-loop simulation using full-scale avionics systems or even entire vehicles. Incorporation of simulation data into real systems is problematic because real system sensors report the real...

Briefs: Electronics & Computers

The distributed engine controls (DEC) task seeks to investigate the capabilities of a distributed network for aircraft engine controls. Traditional aircraft engine control systems use analog systems to...

Briefs: Software
Automated Generation of Failure Modes and Effects Document from a Simple SysML Model

This software queries a model of system in the MagicDraw program and uses that information to create an Excel spreadsheet that represents a basic FMEA (Failure Modes and Effects Analysis). It automates the generation of an FMEA; the user only has to open...

Briefs: Test & Measurement
Quantitative Analysis of Failure Mode in Adhesively Bonded Test Specimens

After adhesively bonded mechanical test specimens have been tested to failure, the failure mode must be interpreted and quantified. Areas of the adherent that are bare (no residual adhesive remains) have undergone adhesive failure. The remainder of the surface has...

Application Briefs: Software
HyperSizer® composite analysis and structural sizing software
Collier Research Corp.
Newport News, VA
757-825-0000
www.hypersizer.com...
Briefs: Mechanical & Fluid Systems
Fail-Safe Accumulator for Internal Active Thermal Control Loops

Spacecraft internal active thermal control systems (ATCSs) typically use water or a water mixture as their working fluid. A gas-charged bellows accumulator pressurizes the system and provides liquid inventory control. If only a single internal ATCS loop is used, the accumulator...

Articles: Motion Control

Future “more electric aircraft” (MEA) will require electric actuation systems for control surfaces and engine controls. Electric motors, drive electronics, and mechanisms are...

Briefs: Test & Measurement

The criterion for structural failure must be based on failure modes of the component being designed. If the component is to withstand millions of cycles of load application,...

Articles: Motion Control

The Multi-segmented Magnetic Ro bot (MSMR) project addresses a capability gap in the intelligence, surveillance, and reconnaissance needs of the U.S. Navy visit, board, search, and seizure...

Who's Who: Physical Sciences
Dr. Vadim Smelyanskiy, Principal Scientist, Ames Research Center, Moffett Field, CA

Dr. Vadim Smelyanskiy is a principal scientist for physics-based methods in the Exploration Technology Directorate at NASA Ames Research Center. During his tenure at NASA, he has been the principal investigator on several projects funded by NASA and other...

Briefs: Materials
Mechanistic-Based Multiaxial- Stochastic-Strength Model for Transversely- Isotropic Brittle Materials

A methodology has been developed and the software written to predict the probability of failure of transversely isotropic (a type of anisotropy) materials under generalized thermomechanical loading. This methodology is mechanistic in that it is...

Briefs: Mechanical & Fluid Systems
Unibody Composite Pressurized Structure

An integrated, generic unibody composite pressurized structure (UCPS) combined with a positive expulsion device (PED), consisting of an elastomeric bladder for monopropellant hydrazine, has been quasi-standardized for spacecraft use. The combination functions as an all-composite, nonmetallic, propellant...

Articles: Imaging

Today’s cameras are cheaper, smaller, and more capable than ever before. Without breaking the budget, a company manager who needs products inspected can buy a camera, quickly code in commands to...

Articles: Robotics, Automation & Control

Designers of medical pumps often have to deal with the challenge of implementing precise, yet low-cost motion control. For most medical pumps, there are three basic technology...

Briefs: Materials
Fibrillar Adhesive for Climbing Robots

A climbing robot needs to use its adhesive patches over and over again as it scales a slope. Replacing the adhesive at each step is generally impractical. If the adhesive or attachment mechanism cannot be used repeatedly, then the robot must carry an extra load of this adhesive to apply a fresh layer with...

Briefs: Electronics & Computers
Memory Circuit Fault Simulator

Spacecraft are known to experience significant memory part-related failures and problems, both pre- and post-launch. These memory parts include both static and dynamic memories (SRAM and DRAM). These failures manifest themselves in a variety of ways, such as pattern-sensitive failures, timing- sensitive failures,...

Briefs: Software
Extended Testability Analysis Tool

The Extended Testability Analysis (ETA) Tool is a software application that supports fault management (FM) by performing testability analyses on the fault propagation model of a given system. Fault management includes the prevention of faults through robust design margins and quality assurance methods, or the...