Keyword: Mechanics

Mechanical & Fluid Systems

Briefs: Mechanical & Fluid Systems
Locking Orifice Retaining Nut

Fluid flow systems often require orifices to control pressure drop or flow rate. These orifices are often retained in bolted housings that require seals and introduce potential leak points into the system.

Briefs: Mechanical & Fluid Systems
Hybrid Mechanical Electrostatic Actuator for Deformable Mirrors

A hybrid mechanical/electrostatic force actuator has been developed for use in deformable mirror applications. Some deformable mirrors, designed to correct errors in optical systems, use electrostatic forces between the flexible mirror surface and a backplane to control the shape of...

Briefs: Mechanical & Fluid Systems

This technique allows for rapid joining of reconfigurable structures. Currently, permanent structural joints are made in factory settings or in situ. However, reconfigurable structures require appropriate...

Briefs: Mechanical & Fluid Systems
Acoustic Mechanical Feedthroughs for Producing Work Across a Structure

Electromagnetic motors can have problems when operating in extreme environments. In addition, if one needs to do mechanical work outside a structure, electrical feedthroughs are required to transport the electric power to drive the motor. Piezoelectric motors can be designed...

Briefs: Mechanical & Fluid Systems
Porous Media Jacket for Use in Regeneratively Cooled Rocket Engines

A paper describes a method for regeneratively cooling worst-case gas-phase thrusters using porous media integrated into a regenerative cooling jacket. The enhanced surface area in the jacket compensates for the much lower effective heat transfer coefficients of gases as compared...

Briefs: Robotics, Automation & Control
Metabolic Heat Regenerated Temperature Swing Adsorption

Two fundamental problems facing the development of a portable system to sustain life on extraterrestrial surfaces are (1) heat rejection and (2) rejection of metabolically produced CO2 to an environment with a ppCO2 of 0.4 to 0.9 kPa as is present on Mars. Portable...

Briefs: Mechanical & Fluid Systems

To achieve power of 250 kW or greater, a large compression ratio of stowed-to-deployed area is needed. Origami folding patterns were used to inspire the folding of a solar array to achieve...

Briefs: Mechanical & Fluid Systems

The LVDT linear position sensor can operate successfully over a wide range of temperatures, depending upon its design and the application in which it is operating. While...

Briefs: Mechanical & Fluid Systems

This invention is a new approach to designing foil bearings to increase their load capacity and improve their reliability through passive thermal management....

Briefs: Mechanical & Fluid Systems
Propellant-Flow-Actuated Rocket Engine Igniter

A rocket engine igniter has been created that uses a pneumatically driven hammer that, by specialized geometry, is induced into an oscillatory state that can be used to either repeatedly impact a piezoelectric crystal with sufficient force to generate a spark capable of initiating combustion, or can...

Briefs: Mechanical & Fluid Systems

This work is a method to drill into a rock surface regardless of the gravitational field or orientation. The required weight-on-bit (WOB) is supplied by a self-contained anchoring mechanism. The system...

Briefs: Mechanical & Fluid Systems

A complete, tested, and tunable shock and vibration suppression device is composed of statically compressed chains of spherical particles. The device superimposes a combination of...

Briefs: Mechanical & Fluid Systems

The FETS is a light and compact thermal surface (sun shade, IR thermal shield, cover, and/or deployable radiator) that is mounted on a set of offset tape-spring hinges. The thermal surface is...

Briefs: Mechanical & Fluid Systems

Future missions to Mars that would need a sophisticated lander, hopper, or rover could benefit from the REARM Arch i tecture. The mission concept REARM...

Briefs: Mechanical & Fluid Systems

Future robotic exploration of near- Earth asteroids and the vertical and inverted rock walls of lava caves and cliff faces on Mars and other planetary bodies would require a method of gripping...

Briefs: Mechanical & Fluid Systems

Next-generation heat-pipe radiator technologies are being developed at the NASA Glenn Research Center to provide advancements in heat-rejection systems for space power and...

Briefs: Mechanical & Fluid Systems

A new gripper mechanism can be used as an end effector for a long arm that reaches out from a nearby spacecraft for a touch-and-go type of mission. The gripper would stabilize...

Briefs: Mechanical & Fluid Systems

It would be desirable to acquire rock and/or ice samples that extend below the surface of the parent rock or ice in extraterrestrial environments such as the Moon, Mars, comets, and asteroids. Such samples...

Briefs: Mechanical & Fluid Systems
Ultra-Compact Transputer-Based Controller for High-Level, Multi-Axis Coordination

The design of machines that rely on arrays of servomotors such as robotic arms, orbital platforms, and combinations of both, imposes a heavy computational burden to coordinate their actions to perform coherent tasks. For example, the robotic equivalent of a person...

Briefs: Mechanical & Fluid Systems

Robots have been a valuable tool for providing a remote presence in areas that are either inaccessible or too dangerous for humans. Having a robot with a high degree of adaptability...

Briefs: Mechanical & Fluid Systems

There is no convenient way to demonstrate mechanically, as an outreach (or inreach) topic, the angular momentum trade-offs and the conservation of angular momentum associated with...

Briefs: Mechanical & Fluid Systems

The moball is envisioned to be a round, self-powered, and wind-driven multifunctioning sensor used in the Gone with the Wind ON-Mars (GOWON) [http://www.lpi.usra.edu/meetings/...

Briefs: Mechanical & Fluid Systems

A high-strength, low-weight pressure vessel dome was designed specifically to house a high-pressure [2,000 psi (≈13.8 MPa)] electrolyzer. In operation, the dome is filled with an inert gas...

Briefs: Motion Control

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...

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: Mechanical & Fluid Systems

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...

Briefs: Mechanical & Fluid Systems

Future lunar landers and rovers will require variable thermal links that allow for heat rejection during the lunar daytime and passively prevent heat rejection during the...

Briefs: Mechanical & Fluid Systems

This drill (see Figure 1) is the primary sample acquisition element of the Mars Science Laboratory (MSL) that collects powdered samples from various types of rock (from clays to massive basalts) at depths up to...

Briefs: Mechanical & Fluid Systems

There are two conventional types of hinges for in-space deployment applications. The first type is mechanically deploying hinges. A typical mechanically deploying hinge is usually composed of several tens...