Spacecraft control systems.
Electronic and electromechanical systems used in spacecraft control systems
RANGER PROJECT↗
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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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Circuit operates as sine function generator
Electronic circuit drives sine function generator using square wave and sawtooth sweep generators. The circuit replaces electromechanical driver and increases accuracy.
Bogart, T., Jr.↗
Variable-capacitance tachometer eliminates troublesome magnetic fields
Dual variable-capacitance tachometer measures angular speed and sense of rotation without magnetic components. Thus it eliminates magnetic flux interference with associated instrumentation in an electromechanical system.
Source record↗
Electropneumatic transducer automatically limits motor current
Pneumatic controller regulates the load on a centrifugal freon compressor in a water cooling system, thus limiting the current input to an electric motor driving it. An electromechanical transducer monitoring the motor input current sends out air signals which indicate changes in the current to the pneumatic controller.
Lovitt, T. F.↗
Human transfer functions used to predict system performance parameters
Automatic, parameter-tracking, model-matching technique compares the responses of a human operator with those of an analog computer model of a human operator to predict and analyze the performance of mechanical or electromechanical systems prior to construction. Transfer functions represent the input-output relation of an operator controlling a closed-loop system.
Source record↗
One-count memory circuit prevents machine mode interaction
One-count memory logic circuit used with electromechanical counter-printer machines operates in either count or print mode. The circuit advances the counter when the machine is in the count mode and provides storage for the count pulse when the machine is in the print mode.
De~forest, B.↗
Development and testing of a low-temperature hydraulic system. Volume I - Actuation applications trade study Final report
Parametric evaluation of hydraulic, pneumatic, and electromechanical actuators for manned spacecraft tasks
TASK↗
Failure information notebook
Failure information notebook for major components of electronic, electromechanical, and mechanical systems of Saturn I launch vehicle
SATURN I LAUNCH VEHICLE↗
The lunar facsimile camera.
Lunar facsimile camera, noting large angular field coverage and electromechanical scanning system with optically narrow instantaneous field
LUNAR CINEMATOGRAPHY↗
Instrument continuously measures density of flowing fluids
Electromechanical densitometer continuously measures the densities of either single-phase or two-phase flowing cryogenic fluids. Measurement is made on actual flow. The instrument operates on the principle that the mass of any vibrating system is a primary factor in determining the dynamic characteristics of the system.
Jacobs, R. B.↗
Power torque wrench concept for precision torque application
Precision electromechanical power wrench applies a given amount of torque to a series of fasteners. It uses a commercially available dc permanent magnet torque motor with a current-controllable torque output and torque value indicator designed to the principles of human engineering.
Peters, G. A.↗
Rolamite - A new mechanical design concept
Rolamite, a mechanical suspension system, provides substantial reductions in friction in the realm of extremely low bearing pressures. In addition, rolamite devices are easily microminiaturized, are extremely tolerant of production variations and are inherently capable of virtually all functions to construct most electromechanical devices.
Wilkes, D. F.↗
Fast scan infrared microscope for improving microelectronic device reliability
Fast scan infrared microscope for measuring thermal and electromechanical parameters affecting reliability of microelectronic devices
TEST METHOD↗
Finding failure-prone components.
Electronic or electromechanical failure-prone component pinpointing using various nondestructive testing methods
FLAW DETECTION↗
Bilateral, Zero-Impedance Static Semiconductor Switch
Static semiconductor switching circuit eliminates the undesirable features of electromechanical relays and conventional semiconductor switching circuits. There is a net zero voltage drop at the terminals and thus a zero impedance for bilateral currents there.
Doughman, C. L.↗
System remotely inspects, measures, and records internal irregularities in piping
Video electromechanical probe visually inspects and measures internal offset and peaking of welds in relatively large piping. Irregularity dimensions are recorded on peripheral equipment consisting of video tape and X-Y plotter. The probe is used for inspection of vacuum-jacketed liquid lines that cannot be inspected externally.
Burry, F. H.↗
Conceptual apparatus for detecting leaks of nonconductive liquids
Apparatus detects leaks at joints in lines carrying electrically nonconductive liquids. The proposed apparatus could include a panel that would give a visual or audible indication of a leak /to permit manual shutdown/ and/or an electromechanical actuator that would automatically cut off the flow when a leak occurs.
Walsh, G. D.↗
Two devices for analysis of nystagmus
Electromechanical devices for measuring vestibular nystagmus
Guedry, F. E., Jr.↗