Motion Control

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 : Motion 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...

Briefs : Motion Control
Test Fixture for Isolation of Vibration Shaker from G-Loading

The first step in implementing the capability to test sensitive launch vehicle instruments in a combined environment has been completed. The test environment consists of specific vibration spectra induced under sustained Gs, using NASTAR’s ATFS-400 centrifuge. Fixtures allow...

Briefs : Motion Control
Rotary Series Elastic Actuator

In order to perform human-like movement, an actuator is placed at each degree of freedom (DOF) in a humanoid robot. Additionally, these actuators must be packaged in an arrangement that approximates human structure and appearance. In this innovation, a rotary actuator assembly incorporates a brushless DC motor, a...

Briefs : Motion Control
Probe Positioning System for Antenna Range

In situ measurements of antenna patterns on rovers in a simulated terrain are difficult to make with conventional antenna range techniques. The desired pattern data covers a hemisphere above the antenna of interest, which is close to the ground. This is incompatible with traditional measurements that...

Briefs : Motion Control
Fluidic Actuators with No Moving Parts

Two new fluidic actuator designs were developed to control fluid flow in ways that will ultimately result in improved system performance and fuel efficiency in to improve the aerodynamic performance of a variety of vehicles. These flow control actuators, often referred to as fluidic oscillators or sweeping...

Briefs : Motion Control
Autonomous Robotic Manipulation (ARM)

Autonomous robotic manipulators have the potential to increase manufacturing efficiency, provide in-home care, and reduce the risk to humans in hazardous situations. The current challenge in autonomous robotic manipulation is to approach the capabilities of dedicated, one-off manipulators in known...

Briefs : Motion Control
Sliding Gait for ATHLETE Mobility

ATHLETE (All-Terrain Hex-Limbed Extra-Terrestrial Explorer) is a multipurpose mobility platform for planetary surfaces. It is a cross between a wheeled rover and a walking robot, and travels using powered wheels mounted on the end of each of six robotic limbs. Each limb is a fully articulated robotic manipulator...

Briefs : Motion Control
Compact, Low-Force, Low-Noise Linear Actuator

Actuators are critical to all the robotic and manipulation mechanisms that are used in current and future NASA missions, and are also needed for many other industrial, aeronautical, and space activities. There are many types of actuators that were designed to operate as linear or rotary motors, but...

Briefs : Mechanical & Fluid Systems
Ultra-Compact Motor Controller

This invention is an electronically commutated brushless motor controller that incorporates Hall-array sensing in a small, 42-gram package that provides 4096 absolute counts per motor revolution position sensing. The unit is the size of a miniature hockey puck, and is a 44-pin male connector that provides many I/O...

Briefs : Manufacturing & Prototyping
High-Accuracy Closed Loop Force Feedback

Hand-driven press assemblies, which require a specific amount of force applied for a given amount of time, present challenges when attempting to accurately measure or replicate results in production or quality control processes. In contrast, servo-driven digital presses are able to provide accurate,...

Briefs : Sensors/Data Acquisition
Rotary Sensing Technologies for Medical and Robotic Shaft Angle Sensing Applications

Today’s sensor technologies for robotic and medical applications include many devices that have evolved from industrial applications. Because of this general migration, they are not ideally suited to the requirements in new robotic and medical products....

Briefs : Medical
Wireless Foot Switch Design Considerations

Wireless foot switches for the control of medical devices are gaining acceptance and growing in popularity — prompting OEMs to design medical equipment for use with a wireless foot switch or to accept a wireless foot switch as a pre-sale or post-sale option.

Briefs : Motion Control
Controlling Devices Using the Ear as an Output Source

Current methods of device control include joysticks, which involve using one or both hands, external microphones that are cumbersome and pick up ambient noise, and external arrays that are also cumbersome and can restrict a user’s movement. Additionally, the external microphone and array...

Briefs : Photonics/Optics
Computer-Assisted Laser Treatment Using Real-Time Retinal Tracking

Diabetic retinopathy resulting from long-term diabetes mellitus is one of the common diseases that leads to choroidal neovascularization (CNV), a leading cause of blindness. Among the currently available treatment methods, a laser can be used to photocoagulate the diseased areas....

Technology Leaders

Tech Briefs TV