Outer and inner bounds on driving-point impedance functions of LLFP networks.
Outer and inner bounds on driving-point impedance functions of LLFP networks with various resistance and reactance configurations
ELECTRIC IMPEDANCE↗
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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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Low speed, long term tracking electric drive system has zero backlash
Electric drive system provides low speed, long term tracking of targets that move at a sidereal rate. It utilizes eddy-current energized actuators that are free from radio frequency interference generation and a solid state feedback amplifier with provisions for antibacklash biasing.
Richter, H. L.↗
Wideband, high efficiency optical modulator requires less than 10 watts drive power
Wideband optical modulation system operates with less than 10-watts drive power. It consists of an optical modulator and transistorized driver that combines small cross-section potassium dideuterium phosphate crystals with laser beam-condensing optics. Optical modulation systems may serve importantly in future space wideband communication systems.
Becknell, W. E.↗
Eccentric drive mechanism is adjustable during operation
Eccentric drive mechanism can be adjusted throughout its off-center range while in the operating mode to change the width of a weld weaving pattern. No associated tooling need be removed.
Dension, O. J., Jr.↗
A functionally-integrated controller- commutator for use in brushless direct-drive solar array reorientation systems
Electronic commutator and rate-sensor for brushless direct-drive solar array reorientation systems
SENSOR↗
Effect of simulated bearing coolant injection on the performance of a two-stage, velocity-compounded turbopump drive turbine
Simulated bearing coolant injection effect on performance of two stage, velocity compounded turbojet drive turbine
TURBOPUMP↗
Driving-point impedance and current for long resonant antennas.
Driving-point impedance and current for long resonant cylindrical antennas
ANTENNA↗
Material considerations in the design of the Nimbus solar array drive.
Material considerations in establishing failure mechanism of Nimbus solar array drive
SOLAR CELL↗
A study of an electrostatic-motor drive for tornado vortices.
Electrostatic motor action in rotational momentum of tornado funnels, noting that driving power removal by electric discharge may cause dissipation
ATMOSPHERIC TURBULENCE↗
Mathematical models for loss measurements in thin permalloy films with ramp drives.
Mathematical models for loss measurements in thin Permalloy films with ramp drives
RAMP↗
Design of flashlamp driving circuits.
Single-mesh circuits design for driving xenon flashlamps, solving normalized nonlinear differential equation
XENON LIGHT↗
Low-drive, temperature stable ferrite for laminated memory arrays.
Temperature stable ferrite materials for laminated memory arrays compatible with integrated semiconductor drive circuit
LAMINATED MATERIAL↗
Low-cost, fast-response drive circuit for electromagnetic torque motors
Fast-response coil drive circuit, for electromagnetic torque motors, reduces the inductive coil time constant with a minimum of circuit sophistication. The low-cost modulator servoamplifier is used with a compatible preamplifier stage which provides the servo-loop function of summing, adjustable gain and compensation.
Zeller, J. R.↗
High-torque precision stepping drive
Stepping drive has been designed for precise incremental angular positioning of scale models of spacecraft about a horizontal axis in order to accurately measure antenna receiving and transmitting characteristics. Positioning is insured by spring-loaded, self-locking plungers.
Kaspareck, W. E.↗
Resonances in the driving-point impedance of an electric dipole in the ionosphere
Resonances in driving point impedance of electric dipole antenna in ionosphere
Blair, W. E.↗
Scale model study of flow patterns in the inlet manifold of the fuel pump drive turbine for the M-1 hydrogen-oxygen rocket engine
Flow conditions in inlet manifold of M-1 fuel pump drive turbine investigated using circumferential static pressure measurements in conjunction with smoke trace photographs
Kline, J. F.↗
Current and driving point impedance computations for long resonant antennas
Current and driving point impedance computations for long resonant cylindrical antennas
Comella, P. A.↗
Cold-air performance evaluation of scale model oxidizer pump-drive turbine for the M-1 hydrogen-oxygen rocket engine. 3 - Performance of first stage with inlet-feedpipe-manifold assembly
Cold air performance test of scale model oxidizer pump drive turbine for M-1 engine - performance of first stage with inlet feedpipe manifold assembly
Kline, J. F.↗