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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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Image orthicon camera for televised images of gaseous regions in interplanetary space /TIGRIS/
Instrumentation, systems engineering, and life support systems for Apollo primate orbital experiment
Communications, electronics, telemetry, command and control, and systems engineering for advanced space systems
Ruggidized Mariner C television camera with resistance to high impact shock and sterilization
Apollo telescopic experiment contamination by space vehicle exhaust products
Communications systems research on information systems and on digital telemetry and command in Deep Space Network
Results of bipropellant valve program with applications to earth storable propellants
Low cost, lightweight ignition system for hydrogen oxygen engine system incorporating multicombustor thrust chambers
The training requirements of all mission phases for crews and ground support personnel are presented. The specifications are given for the design and development of the simulator, data processing systems, engine control, software, and systems integration.
Computer language was developed to furnish programmers with standardized system for handling digital computer simulation of trajectories. System contains collection of models which represent problem to be solved and description of one or more events peculiar to the problem.
A verbatim transcript of the discussion by panel members is presented.
This paper describes a new frequency multiplex scheme called quadrature-multiplex (QM) modulation which generates the interplexed signal with a simpler system structure and even smaller intermodulation loss than the interplex modulation system under a situation where the data rate of one signal is much greater than those of other signals to be multiplexed. A QM modulator and receiver systems are proposed. The performances of the QM systems are evaluated and compared to the interplex systems. Some design curves are obtained to help the communication systems engineer design the QM system. Finally, a signal is designed using the QM for the Orbiter's Ku-Band return link.
The stability of the fan and the compressor components was examined individually using linearized and time dependent, one dimensional stability analysis techniques. The stability of the fan core integrated compression system was investigated using a two dimensional compression system model. The analytical equations on which this model was based satisfied the mass, axial momentum, radial momentum, and energy conservation equations for flow through a finite control volume. The results gave an accurate simulation of the flow through the compression system. The speed lines of the components were reproduced; the points of instability were accurately predicted; the locations where the instability was initiated in the fan and the core were indicated; and the variation of the bypass ratio during flow throttling was calculated. The validity of the analytical techniques was then established by comparing these results with test data and with results obtained from the steady state cycle deck.
The changes in the engine pressure ratio signals which result from thrust changes are used to generate a pitch stabilization signal. The signal is combined with other pitch control signals to automatically counteract pitching moments resulting from the changes in engine thrust.
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(Previously cited in issue 19, p. 3268, Accession no. A81-40912)
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Five basic problems or question areas are examined. They are as follows: (1) Evaluate adequacy of current problem/performance data base; (2) Evaluate methods of performing trend analysis; (3) Methods and sources of data for probabilistic risk assessment; and (4) How is risk assessment documentation upgraded and/or updated. The fifth problem was to provide recommendations for each of the above four areas.