A real-time space station dynamics and control system simulation
Carolyn Grantham, United States. National Aeronautics and Space Administration, Langley Research Center
National Aeronautics and Space Administration, 1971 - Computers - 48 pages
A real-time computer-hardware simulation for the investigation of space station dynamics and control problems is described. The simulation utilizes full-scale control moment gyro (CMG) hardware mounted on a moving base simulator, a manual console, and a Control Data (CDC) 6600 digital computer to represent a space station and its control system. The digital computer software is programed in modular form by using separate subroutines or modules to represent the simulated spacecraft, onboard control computer, isolated experiment packages, and other disturbance or dynamics functions associated with space station operation. A complete functional and operational description of the major elements of the space station simulation is included.
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actual CMG APPENDIX ARCSEC body rates calculations called by SPACE CARD INPUT cell signals CFTB and CMG CMG control CMG gimbal angles CMG gimbal rate CMG hardware CMG momentum CMG system control CMG torques command moments commanded CMG computer software computer-hardware control loop control system control torques curve fit Description Discrete signals discretes equations Euler angles EXPACK Experiment package torques flexible ft-lb/rad functions gimbal rate commands gyro Initial integration isogonal correction KPSI Langley Research Center load cell main program maneuver logic manual control console manual inputs mode controls modular form monitor N-m/rad on-line typewriter operational sequence pilot program control station rates and angles real-time Required input Rigid body routine scale factors servo SFCON 50 ft-lb SFRA 200 deg SFRM 500 ft-lb SFRO signals slug-ft2 space station dynamics space station simulation spacecraft motions spacecraft rates Taylor series total CMG total spacecraft tracking camera U.S. Customary Units