Motion Control

Access our comprehensive library of technical briefs on motion control, from engineering experts at NASA and major government, university, and commercial laboratories.

Briefs : Robotics, Automation & Control
Six-Legged Robots Move Faster with Bipod Gate

Six-legged insects run fastest using a three-legged (tripod) gait where they have three legs on the ground at all times (two on one side of their body and one on the other). The tripod gait has long inspired engineers who design six-legged robots, but researchers at Ecole Polytechnique Fédérale de...

Briefs : Motion Control
Reducing Inaccuracies in Force/Haptic Feedback Systems

Researchers at NASA's Armstrong Flight Research Center have developed a new technology to reduce inaccuracies in force/haptic feedback devices and systems. Used at NASA in aircraft simulations for force feedback pilot controls, these systems involve a servo motor applying precise force to a...

Briefs : Mechanical & Fluid Systems
BiBlade Sampling Chain

The BiBlade sampler has been developed for potentially acquiring samples from the surface of a planetary body. The tool could conceivably be used in both in situ and notional sample return missions to planetary bodies including asteroids, comets, and moons. While the tool was designed for planetary sampling missions, it...

Briefs : Robotics, Automation & Control
Rescue Robot Has Remote Control Function

A group of researchers at Osaka University, Kobe University, Tohoku University, The University of Tokyo, and Tokyo Institute of Technology developed construction robots for disaster relief that solve the various challenges of conventional construction machines used in such situations. Using a prototype...

Briefs : Robotics, Automation & Control
Small Robot Has Outstanding Vertical Agility

Roboticists at the University of California, Berkeley, have designed a small robot that can leap into the air and then spring off a wall, or perform multiple vertical jumps in a row, resulting in what they claim is the highest robotic vertical jumping agility ever recorded. The agility of the robot...

Briefs : Robotics, Automation & Control
Interactive Robot Control System and Method of Use

Researchers at NASA’s Johnson Space Center (JSC), in collaboration with General Motors and Oceaneering, have designed a state-of-the-art, highly dexterous, humanoid robot: Robonaut 2 (R2). R2 is made up of multiple systems and subcomponents: vision systems, image-recognition systems, sensors,...

Briefs : Motion Control
Piezoelectric Actuator with Dual Horns that are Separately Controllable to Drive Miniature Vehicles Along a Single Axis

Actuators are a critical driver of all the mechanisms used in space, and improvements of their operation mechanism enhance mission capabilities. The disclosed invention is a new type of actuator that simultaneously drives dual...

Briefs : Robotics, Automation & Control
Robot Powertrain Moves Toward Energy Autonomy

Inspecting the condition of dykes and other sea defense structures is typically a task for a team of robots. They consume a lot of energy to move across the dykes, perform tests, and communicate the results for six hours a day. Because charging stations are not a realistic scenario, University of...

Briefs : Motion Control
Evaluation Standard for Robotic Research

The Yale-CMU-Berkeley (YCB) Object and Model Set provides universal benchmarks for labs specializing in robotic manipulation and prosthetics. About two years ago, Aaron Dollar, an associate professor of mechanical engineering and materials science at Yale University, came up with the benchmark idea to...

Briefs : Mechanical & Fluid Systems
Mechanisms for Achieving Non-Sinusoidal Waveforms on Stirling Engines

The current state-of-the-art Stirling engines use sinusoidal piston and displacer motion to drive the thermodynamic cycle and produce power. Research performed at NASA Glenn has shown that non-sinusoidal waveforms have the potential to increase Stirling engine power density,...

Briefs : Mechanical & Fluid Systems
Improving Stirling Engine Performance Through Optimized Piston and Displacer Motion

Stirling engines typically achieve high efficiency, but lack power density. Low power density prevents them from being used in many applications where internal combustion engines are viable competitors, and increases system costs in applications that require...

Briefs : Mechanical & Fluid Systems
A Method for Accurate Load/Position Control of Rigidly Coupled Electromechanical Actuators

NASA has developed a technique designed to prevent cross-coupling in systems where two or more linear electro-mechanical actuators (EMA) are rigidly connected and are in danger of becoming cross-coupled. In such systems where the linked EMAs are commanded...

Briefs : Robotics, Automation & Control
Reducing Power-On/Off Glitches in Precision DACs: Part 2

Part 1 of this article introduced a phenomenon called power-on/off glitch. The example discussed the impact of this phenomenon on a motor control system. We limited our analysis to a DAC where the output buffer is powered on in normal mode: zero-scale or mid-scale. In Part 2, we analyze...

Briefs : Robotics, Automation & Control
Reducing Power-On/Off Glitches in Precision DACs

Voltage glitches are common in a signal chain path, especially when the system is being powered up or down. Depending on the peak amplitude and glitch duration, the end result in the system output can be catastrophic. One example is an industrial motor control system where a digital-to-analog...

Briefs : Robotics, Automation & Control
Piezoelectric Actuated Inchworm Motor (PAIM)

Conventional piezoelectric materials, such as PZTs, have reasonably high electromechanical coupling over 70%, and excellent performance at room temperature. However, their coupling factor (converting electrical to mechanical energy and vice versa) drops substantially at cryogenic temperatures, as the...

Briefs : Software
Advanced Rolling Mechanics Analysis (AROMA) 1.0

AROMA uses a boundary-element formulation to calculate normal and shear pressure distributions and sub-surface stresses for elastic bodies in contact. In addition to handling static normal and sheer loading, it also solves the contact problem for rolling elements such as bearings, traction drives,...

Briefs : Materials
Developing Ceramic-Like Bulk Metallic Glass Gears

This invention describes systems and methods for implementing bulk metallic glass-based (BMG) macroscale gears with high wear resistance.

This invention creates bulk metallic glasses (BMGs) with selected mechanical properties that are very similar to ceramics, such as high strength and...

Briefs : Motion Control
Reactionless Drive Tube Sampling Device and Deployment Method

A sampling device and a deployment method were developed that allow collection of a predefined sample volume from up to a predefined depth, precise sampling site selection, and low impact on the deploying spacecraft. This device is accelerated toward the sampled body, penetrates the...

Briefs : Robotics, Automation & Control
Evaluation of Rail Gun Technology for Launch Assist of Air-Breathing Rockets

A prototype horizontal electromagnetic rail launcher has been demonstrated along with a corresponding theory. This system builds out of published work in augmented rail guns, but modifies this technology so that the motor can operate for seconds rather than...

Briefs : Robotics, Automation & Control
Using Harmonics to Control Flutter in Wings with Electrical Motors

As aeronautics engineers develop innovative distributed electric propulsion systems, they face new challenges in ensuring that these innovative aircraft are safe as well as fuel efficient. In particular, these systems involve a large number of electrically driven fan motors...

Briefs : Motion Control
Micropulse Detonation Rocket Engine for Nano-Satellite Propulsion

An efficient propulsion system would use a micropulse detonation rocket engine (–PDRE) for nano-satellite maneuverability in space. Technical objectives are to design, build, and conduct a small detonation tube experiment in order to explore the feasibility of using –PDRE for...

Briefs : Propulsion
Experimental Testbed for 1-MW Turboelectric Distributed Propulsion Aircraft

Researchers at NASA’s Armstrong Flight Research Center are developing a concept aircraft for testing turbo-electric distributed propulsion (TeDP) experiments. TeDP generally involves providing thrust to an aircraft via wing-mounted ducted electric fans, which consist...

Briefs : Robotics, Automation & Control
Propellant Loading Visualization Software

Complex pressure systems are utilized during testing in the propulsion branch as well as during the propellant loading stage of a mission. Keeping track of the state of such a system becomes more difficult as the complexity of such a system increases, and when extensive procedures are being followed. A...

Briefs : Robotics, Automation & Control
Robust Gimbal System for Small-Payload Manipulation

Spaceborne gimbal systems are typically bulky with large footprints. Such a gimbal system may consist of a forked elevation stage rotating on top of the azimuth motor, and occupy a large volume. Mounting flexibility of such a system may be limited.

Briefs : Robotics, Automation & Control
A Phase-Changing Pendulum to Control Spherical Robots and Buoy Sensors

A novel mechanical control system has been proposed for spherical robots to be used as multifunctioning sensor buoys in areas with ambient forces such as winds or currents. The phase-changing pendulum has been specifically designed for Moballs, a self-powered and controllable...

Briefs : Aerospace
Computation of Wing Deflection and Slope from Measured Strain

A lightweight, robust fiber-optic system is the technology behind a new method to compute wing deflection and slope from measured strain of an aircraft. This state-of-the-art sensor system is small, easy to install, and fast, and offers the first-ever means of obtaining real-time...

Briefs : Motion Control
Compact Active Vibration Control System

This innovation consists of an analog controller, diamond-shaped patch actuator, and point sensors (such as accelerometers). The actuator is designed to couple to the flexural response of the structure in the same manner as a group of point sensors. This results in a co-located transducer pair. The signals...

Briefs : Motion Control
Deep Throttling Turbopump

Advancement in space exploration necessitates deep throttling of liquid cryogenic rocket engines. Both lunar and Martian robotic and human exploration require engines that can be deep throttled,can start and restart, have a long life, and require minimal maintenance. An engine that is capable of deep throttling at low...

Briefs : Robotics, Automation & Control
Analyzing Rollover Stability of Capsules With Airbags Using LS-Dyna

As NASA moves towards developing technologies needed to implement its new Exploration program, studies conducted for Apollo in the 1960s to understand the rollover stability of capsules landing are being revisited. Although rigid body kinematics analyses of the rollover behavior...

Question of the Week
Will Cooling Coatings Catch On?

Webcasts

Upcoming Webinars: Manufacturing & Prototyping

3D Printed Metals Are Not All the Same

Upcoming Webinars: Manufacturing & Prototyping

Testing and Inspecting 3D-Printed Parts

Upcoming Webinars: Software

Using Simulation to Design Robust Adhesively Bonded Structures

Upcoming Webinars: Automotive

Electric-Vehicle Transmission Development and Simulation

Upcoming Webinars: Energy

Thermal Management Crisis: Knowing Your Passive Solution Options

Upcoming Webinars: Internet of Things

IoT’s Role in Today’s Transportation Systems

TRENDING STORIES

Articles: Sensors/Data Acquisition

5G in Manufacturing: What’s Here and What’s to Come

Articles: Manufacturing & Prototyping

A Guide to Collaborative Robot Safety

Products: Motion Control

Voice Coil Motor

Articles: Photonics/Optics

Mode-Field Diameter and “Spot Size” Measurements of Lensed and Tapered Specialty Fibers

Briefs: Manufacturing & Prototyping

Process Synthesizes Carbon Nanotubes Using Carbon Dioxide

Briefs: Manufacturing & Prototyping

Welding Ceramics with Lasers