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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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Refined computerized plotting system produces low-cost graphic-numeric charts that illustrate fiscal data on monthly incremental or cumulative basis, or both. Output is in the form of hard copy or microfilm, or visual-aid transparencies prepared from hard copy for rapid management status presentations.
Determining optimal time-invariant output feedback controllers for linear dynamic systems
Input-output properties of feedback systems based on linear time invariate systems
Algorithm for identification of system parameters from input-output data with application to air vehicles
Enhancement output power of CO-2 laser excited by electric discharge and irradiated by neutrons obtained from nuclear reactor
Auxiliary computer routines for generating, checking, and displaying NASTRAN input and output data for analysis of aerospace vehicle structures
Output format coding for telemetry data compressor channel and frame identification
Variable microwave thermal noise temperature standard generator with output ranging from below 40 to above 370 K
Tunnel diode output voltage converter circuit diagram and waveforms
Nuclear reaction products effect on population inversion in gas lasers, considering neutron irradiation enhancement of carbon dioxide laser output
Liapunov functions generation for input-output stability of dynamical systems, using causal operator and state space realization
Output pulse amplitude from lithium-drifted detector-amplifier combination under conditions of carrier diffusion and bulk and surface recombination
Chronic centrifugation effects on water intake and urine output in mice, considering food intake and growth rate
Error correcting binary block code decoding on Q-ary output channels /weighted erasure decoding/, considering applications
Three-stage amplifier is used for ECG measurements which require conversion of differential input to single-ended output. Circuit may be useful in biological telemetry for amplification of signals from specimen-implanted sensors.
Circuit which integrates spacecraft gyro output voltages to provide analog position signals has been developed. Accurate integration is provided by all solid state system which uses no choppers and takes advantage of commercially available flight qualified components.
Technique is described to reduce extraneous gyro output signals by using relatively inexpensive shrouds which do not increase power comsumption. Shrouds reduce noise by minimizing mass of gas spinning with rotor, reducing Reynolds number near rotor, and inducing laminar flow.
The equations of motion used in the computation are discussed along with the space charge fields and the integration process. The following assumptions were used as a basis for the computation: (1) The beam is divided into N axisymmetric discs of equal charge and each disc into R rings of equal charge. (2) The velocity of each disc, its phase with respect to the gap voltage, and its radius at a specified position in the drift tunnel prior to the interaction gap is known from available large signal one dimensional programs. (3) The fringing rf fields are computed from exact analytical expressions derived from the wave equation assuming a known field shape between the tunnel tips at a radius a. (4) The beam is focused by an axisymmetric magnetic field. Both components of B, that is B sub z and B sub r, are taken into account. (5) Since this integration does not start at the cathode but rather further down the stream prior to entering the output cavity it is assumed that each electron moved along a laminar path from the cathode to the start of integration.