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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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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.
Automatic system rapidly and accurately determines moments and products of inertia of asymmetrical objects. The system combines a torsional pendulum arrangement and a precision rate table with simplified analog computers to determine the desired quantities directly, without the need for additional calculations.
Onboard control systems and elements for aerospace vehicles - signal noise in fluid amplifier, hydraulic and pneumatic stepping motors, fluid transmission line dynamics, analog computer circuits, electric servomotor, and closed cycles
Analog computer program for parametric study of factors influencing deep stall pitch-up characteristics of T-tail transport aircraft
Analog computer simulation of two-spool solar Brayton system to study control requirements for operation in 300-nautical mile ecliptic earth orbit
Analog/hybrid computer design, noting inclusion of solid state and integrated circuits for reliability cost reduction and speed
Simulation error compensation techniques for error reduction in analog computers
Analog computer simulation study of precise hybrid servo system to control experimental optical tracking mount
Analog computer simulation to assess random sampling interval effects on sampled data model of human operator
Chebyshev minimax solutions for Saturn launch vehicle control problems, and hybrid-analog computer realization of algorithm
Flexible body analog computer program and rigid body digital computer program for calculating dynamic characteristics of double-V antennas on Radio Astronomy Explorer satellite
Analog computed time histories and altitude-ground track plots of swept wing transport aircraft longitudinal response to wind shear and sustained gusts during landing approaches
Analog computer for determining pilot response in manual control systems
Mathematical model of random wind velocity for synthesis of analog computer network to simulate wind turbulence
Solar flare measuring system using vidicon TV camera combined with analog computer and digital encoder to produce quantitative time history data
Method of real time equalization involving use of an analog computer achieves effective qualification testing by realistically simulating the effects of the vibrational forces which will actually be experienced in powered flight.
Steepest descent optimization by parameter- perturbation correlation using fast analog computer
Feasibility study of hydromechanical actuator using analog computer simulation