Keyword: Control systems

Briefs: Mechanical & Fluid Systems
Ultralight Self-Deployable Solar Sails

Deployment of large structures such as solar sails relies typically upon electromechanical mechanisms, mechanically expandable or inflatable booms, launch restraints, controls, and other mechanisms that drastically increase the total mass, stowage volume, and areal density. The primary performance parameter...

Briefs: Software
Self-Stabilizing, Byzantine-Fault-Tolerant Clock Synchronization System and Method

NASA’s Langley Research Center has developed a portfolio of technologies regarding clock synchronization in distributed systems. Distributed synchronous systems that need to provide globally coordinated operations require each component (node) in the system to...

Articles: Aerospace

NASA is developing the capabilities needed to send humans to an asteroid by 2025, and to Mars in the 2030s. While robotic explorers have studied Mars for more than 40 years, NASA’s path for the...

Briefs: Mechanical & Fluid Systems
Passive, Integrated, Sublimator-Driven Coldplate

Spacecraft thermal control systems typically perform three key functions — heat acquisition, heat transport, and heat rejection — in addition to those of insulation, heat generation, and heat storage. In a typical pumped fluid-loop spacecraft thermal control system, heat is acquired from...

Briefs: Test & Measurement

One existing method to quantify the gas loss from a closed system is the mass point leak rate method. This traditional empirical method is capable of quantifying the loss of a known type of gas from a...

Articles: Robotics, Automation & Control

An often asked question from industrial machine builders or integrators is how they can effectively design or implement the conversion of a machine with servo technology to...

Briefs: Software
Optimal Prioritized Actuator Allocation

For formation flying, rendezvous and docking, and proximity operations with small bodies of the solar system, spacecraft require simultaneous translational and rotational agility. The necessary agility is generally provided by combinations of multiple small thrusters and torque-only actuators. To use these...

Briefs: Software
Traceable Automation with Remote Display and Interruptible Scheduler Version 1.04.0

Traceable Automation with Remote Display and Interruptible Scheduler (TARDIS) is a software set designed for use in ground operations. TARDIS is a multi-mission automation framework that supports seamless integration of manual and automatic processing. It was...

Briefs: Propulsion
Burnable-Poison-Operated Reactor Using Gadolinium Loaded Alloy

The problem to be resolved in this work was the use of radial control drums as the sole active reactivity control system for nuclear thermal propulsion, which results in significant rocket performance changes during full-power operation. This can result in large inefficiencies in...

Application Briefs: Aerospace
Beckhoff Automation
Savage, MN
952-890-0000
www.beckhoffautomation.com

Large NASA production facilities, such as the Michoud Assembly...

Briefs: Sensors/Data Acquisition
Full-Field Inverse Finite Element Method for Deformed Shape- and Stress-Sensing of Plate and Shell Structures

Structural health management systems that, by way of real-time monitoring, help mitigate accidents due to structural failures, will become integral technologies of the next-generation aerospace vehicles. Advanced sensor arrays and signal...

Briefs: Aerospace
StormGen Weather Editor

Experiments that take into account the impact of convective weather on airspace operations, future concepts, and flight deck tools require a source of weather data that is readily available, of predictable quality, and tailorable to experimental objectives. Real-world weather data is sparse, highly random, and...

Briefs: Sensors/Data Acquisition
Cryogenic Propellant Feed System Analytical Tool

The Propellant Feed System Analytical Tool (PFSAT) predicts heat leak based on insulation type, installation technique, line supports, penetrations, and instrumentation. It also determines the optimum orifice diameter for an optional thermodynamic vent system (TVS) to counteract heat leak into the...

Articles: Aerospace

“The sky could become increasingly crowded as personal and commercial uses of unmanned aircraft systems (UAS) become more popular,” said Parimal Kopardekar, manager of NASA’s Safe Autonomous...

Briefs: Software

Numerical simulations of plume impingement heating to the International Space Station (ISS) and its visiting vehicles require a specific way to...

Briefs: Materials
Advanced Supported Liquid Membranes for CO‚2 Control in EVA Applications

NASA has a clear need to develop new technology in support of its future goals, including missions beyond low-Earth orbit, the possible development of lunar outposts, and the eventual exploration of Mars. As these missions develop, it is anticipated that crew members will...

Briefs: Mechanical & Fluid Systems
Piezoelectric-Actuated Cryogenic Thermodynamic Vent Valve

Cryogenic fluid control valves require actuation that controls the geometric position of the orifice in a thermally stable manner. Traditional actuator devices may have various materials used in their construction that have varying CTEs (coefficients of thermal expansion) and therefore...

Briefs: Mechanical & Fluid Systems
Aluminum Gas Tungsten Arc Orbital Tube Welding

JPL has been hand-welding aluminum tubing for decades in support of flight programs and ground support equipment, including thermal plates and shrouds. This hand-welding process is time-consuming, cumbersome, difficult, and unreliable in terms of repeatability and success, which leads to leaks,...

Briefs: Robotics, Automation & Control
Contact State Estimation for Multi-Finger Robot Hands Using Particle Filters

A method, using a particle filter, has been created for identifying the location, orientation, and shape of an object that a robot hand touches. An appropriate motion model has been defined that characterizes the motion of the robot hand as it moves relative to an...

Briefs: Aerospace
Station/Orbiter Multibody Berthing/Docking Analysis Tool (SOMBAT)

The main objective of this work was to develop a high-fidelity, nonlinear simulation of complex flexible structures with active control systems. A multibody system can consist of several flexible articulating components. The system can also have multiple control systems. The main...

Briefs: Electronics & Computers
General-Use Nodal Network Solver (GUNNS)

Crewed space vehicle training has always required highfidelity models of vehicle systems. Many of these systems, particularly of the “flow” variety, benefit from modeling the system as a whole, rather than relying only on the interactions between individual components. In general, system properties...

INSIDER: Sensors/Data Acquisition

Light, sound, and now, heat. Just as optical invisibility cloaks can bend and diffract light to shield an object from sight, and specially fabricated acoustic metamaterials can hide an...

Briefs: Test & Measurement
Measurement of O-phthalaldehyde (OPA)

O-phthalaldehyde (OPA) is a high-level disinfectant commonly used, for example, for sterilization of heat-sensitive medical instruments; it demonstrates effective microbicidal activity against a wide range of microorganisms (including mycobacteria, gramnegative bacteria, and spores). On the International...

Briefs: Manufacturing & Prototyping

Additive manufacturing (AM, also informally known as 3D printing) is a relatively new process for fabricating net- shaped parts from a...

Application Briefs: Robotics, Automation & Control

Unlike industrial robots for manufacturing, service robots come with their own specification requirements aimed specifically at the end user, and the most discriminating user at...

Briefs: Sensors/Data Acquisition
Micro-LIDAR for Flow Velocimetry

A miniature light detection and ranging (LIDAR) velocimetry sensor has been developed to analyze high-velocity and boundary layer flows in real-world conditions. Using Rayleigh scattering, as opposed to the more common particle scattering, the patent-pending sensors provide multiple flow parameters without the...

Briefs: Robotics, Automation & Control
James Webb Space Telescope Microshutters Subsystem Project Thermal Chamber Ground Support Equipment Automated Control

An automated control system for the microshutter assembly (MSA) portion of the JWST MSS (James Webb Space Telescope Micro shutters Subsystem) was developed. This is a cryogenic device that operates at 35 K. Cooling down and...

Briefs: Robotics, Automation & Control

Preliminary data was recently provided for a reaction sphere prototype on NASA’s zero-gravity parabolic flight vehicle. Gyroscope telemetry indicates that reaction spheres were...

Articles: Robotics, Automation & Control

Although there are a number of variations of drive technologies for motion applications, there are a few that are used for the majority of systems being built today. These most common drives do take a bit...

Top Stories

INSIDER: Electronics & Computers

Diamond Transistors

Blog: Connectivity

10 VR/AR Technologies from CES 2023

INSIDER: Photonics/Optics

NIF Laser Systems Chief Engineer to Discuss Historic Fusion Ignition...

Quiz: RF & Microwave Electronics

What Exactly is LiDAR?

Blog: Materials

Adding Vibrations to Electronics to Reduce Vibrations

Articles: Electronics & Computers

Thermal Modeling of Small Satellites