Keyword: Vehicle dynamics

Briefs: Propulsion
The thruster provides a low-cost, extremely efficient propulsion source for miniature satellites.
Briefs: Motion Control
The new hinge is the key to get loadbearing, large quadrotors to climb a few dozen feet in seconds.
Briefs: Propulsion
Bio-Inspired Propulsion
Frequencies and passive dynamics of vehicles moving in air or water help enhance propulsion performance.
Articles: Imaging

The last thing you probably do when a fly buzzes toward you is marvel at its graceful wing and body kinematics. But that’s exactly what researchers at Cornell University’s Itai Cohen Group...

Briefs: Software
Small-Body Dynamics Toolkit Version 5.0

The Small-Body Dynamics Toolkit (SBDT) v5.0 is a collection of primitive-body-specific trajectory design and analysis tools written in MATLAB®. The SBDT gives the user the capabilities to propagate, analyze, and visualize spacecraft trajectories and the dynamical environment near realistic asteroid,...

Briefs: Propulsion
Thruster-Based Attitude and Translation Control with Minimum Pulse-Count Disturbance Rejection

Thruster-based control typically requires a substantial engineering effort in order to mitigate an important issue: the control system tends to use many thruster pulses to accomplish what a single thruster pulse could do instead. This fundamental...

Briefs: Motion Control

In the area of maintaining conventional motorcycle stability, engineers have established a series of tests that measure the wobble, weave, and kickback of every new model before it is released...

Briefs: Motion Control
Formulation and Algorithm for Multi-Flexible-Body Dynamics

An improved formulation of the dynamics of multiple flexible bodies coupled via joints, and an algorithm that implements the formulation, have been developed at Johnson Space Center (JSC). A robot arm with multiple, somewhat flexible links is a prime example of a dynamic system to which...

Briefs: Mechanical & Fluid Systems
Model-Based Monitoring for Spacecraft Thruster Leakage

A report describes a method of detecting leakage in one of the 16 thrusters of the Cassini spacecraft. The detection method, implemented as part of the spacecraft flight software, is based on the fact that the three-axis rotational motion of a spacecraft is governed by the Euler's equation....

Briefs: Mechanical & Fluid Systems

This airplane is expected to be safe from destruction by flutter instabilities.

Briefs: Robotics, Automation & Control
Performance of an Arc-Jet Thruster

A report discusses the design and testing of a laboratory-model arc-jet thruster designed to operate at a nominal power level of 300 W. This thruster is an intermediate product of continuing efforts to develop smaller, lower-power, higher-specific-impulse thrusters for use in a forthcoming generation of small...

Briefs: Test & Measurement

Nearly every military and commercial aircraft in the United States today uses pitot-static probes for accurate, repeatable airdata measurements. Recently, local angle-of-attack- and...

Briefs: Software
Program for Simulating Dynamics of Multibody Systems

The Dynamics Algorithms for Real-Time Simulation (DARTS) computer program solves the equations of motion of tree-topology, flexible, and/or multibody mechanical systems as diverse as molecules, mechanisms, robots, spacecraft, and ground vehicles. It has proven to be particularly useful for...