Motion Control

Motion Control

Browse innovative developments in motion control technologies. Find essential news, technical briefs, and applications used in PID controllers, servo motors, direct drive solutions, autonomous positioning, and motion-related components.

Briefs: Robotics, Automation & Control
Computer Simulation Ensures Motorcycle Stability

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: Robotics, Automation & Control
Direct Steering Component for Recumbent Tricycles

When developing the steering component of the Catrike Speed recumbent tricycle, the manufacturer switched from metal bearings to igubal® plastic rod ends for lighter weight (80%...

A multitude of tests are necessary during the manufacture of sophisticated tables used to position patients in nuclear-medicine-based medical imaging machines. Some of the...

Briefs: Motion Control
Compact Motors Provide Motion Control for Explosive Ordnance Disposal Robot

A remote-controlled, compact Explosive Ordnance Disposal Robot (EOD) has been deployed in Iraq, Afghanistan, and other worldwide locations to secure and transport hazardous, dangerous, or suspicious materials to a safe location where it can be disarmed or destroyed. The...

Briefs: Robotics, Automation & Control
Improving Control of Two Motor Controllers

A computer program controls motors that drive translation stages in a metrology system that consists of a pair of two-axis cathetometers. This program is specific to Compumotor Gemini (or equivalent) motors and the Compumotor 6K-series (or equivalent) motor controller. Relative to the software supplied...

Briefs: Motion Control
Two-Armed, Mobile, Sensate Research Robot

The Anthropomorphic Robotic Testbed (ART) is an experimental prototype of a partly anthropomorphic, humanoid- size, mobile robot. The basic ART design concept provides for a combination of two-armed coordination, tactility, stereoscopic vision, mobility with navigation and avoidance of obstacles, and...

Briefs: Robotics, Automation & Control
Compact, Automated Centrifugal Slide-Staining System

The Directional Acceleration Vector-Driven Displacement of Fluids (DAVDDOF) system, under development at the time of reporting the information for this article, would be a relatively...

Briefs: Robotics, Automation & Control
Arc-Second Pointer for Balloon-Borne Astronomical Instrument

A control system has been designed to keep a balloon-borne scientific instrument pointed toward a celestial object within an angular error of the order of an arc second. The design...

Briefs: Robotics, Automation & Control
Exhaust Nozzle for a Multitube Detonative Combustion Engine

An improved type of exhaust nozzle has been invented to help optimize the performances of multitube detonative combustion engines. The invention is applicable to both air-breathing...

Briefs: Robotics, Automation & Control
Position Sensor Integral With a Linear Actuator

A noncontact position sensor has been designed for use with a specific two-dimensional linear electromagnetic actuator. To minimize the bulk and weight added by the sensor, the sensor has been...

Briefs: Robotics, Automation & Control
Improved Electromagnetic Brake

A proposed design for an electromagnetic brake would increase the reliability while reducing the number of parts and the weight, relative to a prior commercially available electromagnetic brake. The reductions...

Briefs: Robotics, Automation & Control
Active Suppression of Instabilities in Engine Combustors

A method of feedback control has been proposed as a means of suppressing thermo-acoustic instabilities in a liquid- fueled combustor of a type used in an aircraft engine. The basic...

Briefs: Robotics, Automation & Control
Magnetocaloric Pumping of Liquid Oxygen

As noted in the previous article, the field-induced force density on a magnetic fluid is proportional to the magnetic susceptibility times the gradient of the magnetic field squared. The direction of...

Briefs: Robotics, Automation & Control
Pumping Liquid Oxygen by Use of Pulsed Magnetic Fields

An effort is underway to develop a method of pumping small amounts of liquid oxygen by use of pulsed magnetic fields. This development is motivated by a desire to reduce corrosion and hazards of explosion and combustion by eliminating all moving pump parts in contact with the pumped...

Briefs: Robotics, Automation & Control
A Software Architecture for Semiautonomous Robot Control

A software architecture has been developed to increase the safety and effectiveness with which tasks are performed by robots that are capable of functioning autonomously but sometimes are operated under control by humans. The control system of such a robot designed according to a prior...

Briefs: Robotics, Automation & Control
Compact Plasma Accelerator

A plasma accelerator has been conceived for both material-processing and spacecraft-propulsion applications. This accelerator generates and accelerates ions within a very small volume. Because of its compactness,...

Briefs: Robotics, Automation & Control
Improved Electrohydraulic Linear Actuators

A product line of improved electrohydraulic linear actuators has been developed. These actuators are designed especially for use in actuating valves in rocket-engine test facilities. They are also...

Modifications have been proposed to effect further improvement of the device described in “Improved Piezo- electrically Actuated Microvalve” (NPO-30158), NASA Tech Briefs, Vol....

Briefs: Mechanical & Fluid Systems
Larger-Stroke Piezoelectrically Actuated Microvalve

A proposed normally-closed microvalve would contain a piezoelectric bending actuator instead of a piezoelectric linear actuator like that of the microvalve described in the preceding...

Designers of deep submersibles are reluctant to use conventional shafts and seals to penetrate the hulls of deep submersible, pressure vessels fearing seal...

Briefs: Mechanical & Fluid Systems
Safer Roadside Crash Walls Would Limit Deceleration

The figure depicts the aspects of a proposed deceleration-limiting design for crash walls at the sides of racetracks and highways. The proposal is intended to overcome the dis- advantages...

Briefs: Mechanical & Fluid Systems
Continuous Tuning and Calibration of Vibratory Gyroscopes

A method of control and operation of an inertial reference unit (IRU) based on vibratory gyroscopes provides for continuously repeated cycles of tuning and calibration. The method is intended especially for application to an IRU containing vibratory gyroscopes that are integral parts of...

Briefs: Mechanical & Fluid Systems
Improved Bearingless Switched-Reluctance Motor

The Morrison rotor, named after its inventor, is a hybrid rotor for use in a bearingless switched-reluctance electric motor. The motor is characterized as bearingless in the sense that it does...

The designers and manufacturers of fuel cells are continually striving to improve the efficiency of their products. A design challenge facing the engineer relates to...

The first step of pattern matching always includes a learning process. A “gold” master is used to create a template. This template is used for identification purposes on all...

Articles: Motion Control
Force/Torque Sensor Systems

Force/Torque (F/T) sensors are critical components of robotic applications in electrical and mechanical assembly, product testing, material handling, and many other applications. A sensor system helps robots...

Energy savings is one of the key ingredients in reducing costs for any manufacturing operation. A simple, but very effective, way to save energy is by making fans run more...

Standard induction motors, normally designed to run at base speeds between 850 to 3500 rpm, are not particularly well suited for low-speed operation, as their...

An improved method has been devised for the computational prediction of a collision between (1) a robotic manipulator and (2) another part of the robot or an external object in the...

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