Analog and digital simulations of multiplex system performance
Analog and digital simulations of multiplex system performance
Riter, S.↗
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Integrated spacecraft display development Final report
Specification and design of projection display system for fixed base spacecraft simulator with data basis for analog simulator evaluation program
PROJECTION↗
Study-fluid flight path control system final report
Control system for lateral and pitch flight path stabilization of light aircraft - analog simulation of Cessna 310 aircraft
AIRCRAFT CONTROL↗
A fixed-base simulator study of piloted entry into the earth's atmosphere at parabolic velocity
Spacecraft piloted entry into earth atmosphere at parabolic velocity investigated on fixed base analog simulator
PARABOLIC VELOCITY↗
Laboratory simulation of absorption spectra in cloudy atmospheres
Laboratory analog simulation of absorption line spectra in cloudy planetary atmospheres, comparing with computational model based on plane parallel atmosphere
Hunt, G. E.↗
Analog-digital, digital-analog converter for a digital control system simulator
Analog-to-digital and digital-to-analog converters for digital control system simulation
COMPUTER SIMULATION↗
A periodic nonuniform heat-transfer mechanism in film boiling.
Electric analog simulation of periodic nonuniform heat transfer mechanism in film boiling from coated plate
ANALOG SIMULATION↗
SIMULATION OF STATIC AND KINETIC FRICTION FOR AN ANALOG COMPUTER
Simulation of static and kinetic friction for an analog computer
FRICTION↗
Analog Studies of the Limit-cycle Fuel Consumption of a Spinning Symmetric Drag-free Satellite
Analog simulation of limit-cycle fuel consumption of spinning symmetric drag-free satellite
ANALOG SIMULATION↗
Control synthesis for spinning aerospace vehicles.
Linear and nonlinear attitude control law synthesis for spinning aerospace vehicles, including analog simulation for control designs based on frequency symmetry
SATELLITE ATTITUDE CONTROL↗
Mapping a tungsten-reactor rocket engine as a guide to operation and control
Nonlinear analog simulation of tungsten water moderated reactor to obtain steady state operating maps
MAP↗
Computer control study for a manned centrifuge Final technical report
Analog simulation of manned centrifuge capability for production of various gravity levels - centrifuge control system
ACCELERATION STRESS↗
Evaluation of a vertical-scale, fixed-index instrument display panel for the X-15 airplane
Analog simulation to compare pilot performance in using operational X-15 instrument panel, and vertical scale, fixed index instrument display panel
X-15 AIRCRAFT↗
Evaluation of on-line pulse control for vibration suppression in flexible spacecraft
The following topics are covered in view graph form: (1) pulse control strategy; (2) stability analysis and digital simulations; (3) digital/analog and analog/digital conversions, and analog simulation; and (4) experimental studies.
Dehghanyar, T. J.↗
A computer-aided telescope pointing system utilizing a video star tracker
The Video Inertial Pointing (VIP) System developed to satisfy the acquisition and pointing requirements of astronomical telescopes is described. A unique feature of the system is the use of a single sensor to provide information for the generation of three axis pointing error signals and for a cathode ray tube (CRT) display of the star field. The pointing error signals are used to update the telescope's gyro stabilization and the CRT display is used by an operator to facilitate target acquisition and to aid in manual positioning of the telescope optical axis. A model of the system using a low light level vidicon built and flown on a balloon-borne infrared telescope is briefly described from a state of the art charge coupled device (CCD) sensor. The advanced system hardware is described and an analysis of the multi-star tracking and three axis error signal generation, along with an analysis and design of the gyro update filter, are presented. Results of a hybrid simulation are described in which the advanced VIP system hardware is driven by a digital simulation of the star field/CCD sensor and an analog simulation of the telescope and gyro stabilization dynamics.
Murphy, J. P.↗
Computer program simulates physical systems by solving the simultaneous differential equations describing the systems
DIANA, a digital-analog simulation program for IBM 1620 2 computer, simulates physical systems by solving the simultaneous differential equations describing the systems. It expands and optimizes the input-output capabilities, permits additional flexibility in midstream program alternation, and minimizes the computational time.
Mankovitz, R. J.↗
Analog quantizing circuit.
Analog circuit simulating quantization for analog simulation of hybrid control system, showing quantized output and error signal for wave forcing function
Coon, T. R.↗
Magnetic suspension system for an Annular Momentum Control Device (AMCD)
A technique to control a rim suspended in a magnetic field was developed. A complete system was developed, incorporating a support structure, magnetic actuators, a rim drive mechanism, an emergency fail-safe system, servo control system, and control electronics. Open loop and closed loop response of the system at zero speed and at 500 revolutions per minute (r/min) of the rim was obtained and analyzed. The rim was then dynamically balanced and a rim speed of 725 r/min was achieved. An analog simulation of the hardware was developed and tested with the actual control electronics connected to the analog computer. The system under development is stable at rim speeds below 700 r/min. Test results indicate that the rim under test is not rigid. The rim has a warp and a number of binding modes which prevented achievement of higher speeds. Further development efforts are required to achieve higher rim speeds.
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