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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Electromechanical rotary actuator, which operates over wide temperature range, contains a spring stop which has been calculated to limit internal deceleration loads to a magnitude equal to stall torque. Cryogenic capability is obtained by using dry lubricant on the gears and no lubrication on the bearings.
Converting electric power into powerful linear thrust without generation of magnetic fields is accomplished with an electrothermal linear actuator. When treated by an energized filament, a stack of bimetallic washers expands and drives the end of the shaft upward.
Actuator exerts linear force that is controllable and reproducible to microinch tolerance. It is constructed for extremely accurate control of a valve but can also be used as a variable venturi meter, micropositioner, microthruster, and in fluidics and reaction-control systems.
Design and performance of electromechanical actuator for missile control system
Mechanical and electrical functions of thermal lightweight oscillating actuator for satellite systems
Operational characteristics of actuator for spacecraft thermal control system
Design, manufacture, and testing of thermally actuated gimbal
High temperature hydraulic system actuator seals for advanced supersonic aircraft - graphs
Development and testing of actuator having microinch linear displacement capability and using piezoelectric clutching
NERVA control drum actuator tests in cryogenic temperature, nuclear radiation, and vacuum environments
Metallurgical and hydrogen embrittlement tests on Saturn S-1C engine actuator midstroke locking mechanism bolt MS 24678-60
Neuromuscular actuation system model, noting compatibility with human physiological and anatomical data in tracking tasks
Torqued two axis gimbaled boom actuator satellite attitude control
Actuator disk model for study of azimuthally nonuniform MPD arc plasma dynamics
Analysis of a typical nonlinear electrohydraulic servo-model establishes the dynamic-performance capabilities of servo-actuation systems.
Microminiature slide action valve requires power only during actuation and can be used as an on-off or single inlet to alternately selected outlets.
Release mechanism for actuation of automatic device operates on system of restrained energy force, which is automatically released by electrical charge that may be applied by manual switch or, in remote application, by RF impulse, received by conventional electronic circuitry.
Description of scan actuator geared servomechanism for Mariner Mars 1969 spacecraft