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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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A dc analog input can be used to produce an integrator with high dynamic range or a position servo with inherent stability. This is done by a switching system using digital-to-analog converters and an electronic switch to obtain the desired outputs.
Four-stage transistorized ac amplifier provides high input impedance and operates at low intrinsic noise levels. It is suited to carrier or narrow band sine wave applications.
Computer system monitors inputs from checkout devices. The comparing, addressing, and controlling functions are performed in the I/O unit. This leaves the computer main frame free to handle memory, access priority, and interrupt instructions.
Low-input voltage converter/regulator constructed in a coaxial configuration minimizes external magnetic field disturbance, suppresses radio noise interference, and provides excellent heat transfer from power transistors. It converts the output of fuel and solar cells, thermionic diodes, thermoelectric generators, and electrochemical batteries to a 28 V dc output.
Computation methods and results for orbital data, spacecraft angle, and heat input for OGO AND specifically for EGO
Computer processing which reconstructs sampled input of linear system from its sampled output and its unit step response
Switching and circuit studies for development of low input voltage converter and regulator
Minimization of total heat input for manned vehicles entering atmosphere at hyperbolic speeds
Optimal control of nonlinear saturating systems with stochastic inputs
Performance criterion for linear statistical filters with random inputs
Current distribution and input impedance of infinite cylindrical antenna in anisotropic plasma, treating it as boundary value problem
Input impedance of small loop of uniform electric current immersed in anisotropic cold magnetoplasma calculated by induced emf method
Input-output stability conditions of time-varying nonlinear feedback systems obtained, using concepts of loop gain, conicity and positivity
Technology of T-1 and T-1A steels is emphasized in investigation of their weld-fabrication. Welding heat input rate, production weldment circumstances, and standards of welding control are considered.
Reflectometer, built into a microwave input system, measures the match of devices in the waveguide system of tracking receivers. Match measurements can be made on a routine calibration basis. It was installed in the S-band receiving system in the feed cone of the 210-ft antenna.
Exact expression for input impedance of small loop of electric current when loop is immersed in infinite, homogeneous, cold anisotropic plasma
Effects of various heat input rates on steel welds
Synchronization of redundant low input voltage conversion and regulation systems for use with satellite energy conversion sources