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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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Miniature servo accelerometer measures unusually small forces of torques. The pendulous mass of the accelerometer is suspended by fused quartz torsion fibers in an electromagnetically force- balanced environment. It is used in gravity surveys for exploring mineral deposits.
Servo amplifier feedback system, in which the phase sensitive detection, low pass filtering, and multiplication functions required for quadrature rejection, are preformed by light-controlled photoresistors, eliminates complex circuitry. System increases gain, improves signal-to-noise ratio, and eliminates the necessity for compensation.
Electronic speed control design maintains magnetic tape in close synchronism at the airborne and ground stationed devices. Use of the servo system during the record and reproduce modes results in the minimum amount of frequency distortion and flutter.
Hydraulic servo system increases accuracy in applying fatigue loading to a specimen under test. An error sensing electronic control loop, coupled to the hydraulic proportional closed loop cyclic force generator, provides an accurately controlled peak force to the specimen.
Simulated space environment life testing of step- servo assembly for radiation experiments on OSO D satellite
Multiplace metabolimeter closed circuit system with servo-driven volume meter for animal oxygen consumption in gaseous artificial environments
Valve was developed using air bearings which provide frictionless operation. The servo valve is of the flat plate type with rectangular meter openings. Fluid bearings support the metering plate. The overlap is adjustable by means of a variable hinge block support.
Analog computer simulation study of precise hybrid servo system to control experimental optical tracking mount
Ground station phase locked servo system for decoding pulse position modulation signals from sounding rockets
Systems analysis of antenna tracking servo systems and adaptive techniques for improving accuracy
Fabrication and test of flueric position servo for control drum of nuclear rocket engine
Design schematics and systems analysis of servo control unit used on endless loop magnetic tape recorder
Testing command service module S band high gain antenna servo
Fast response electrohydraulic valve-controlled piston servo systems
Microelectronic servoamplifier design, tests, and evaluation for stabilizing gas bearing gyro servo loops
Simulator servo drive system dynamic requirements for single-axis manual control task using pilot models and computer
Servo system for retroreflector of Michelson interferometer