Definition and design of an experiment to test raster scanning with rotating unbalanced-mass devices on gimbaled payloads
W. D. Lightsey, D. C. Alhorn, Michael Edward Polites, United States. National Aeronautics and Space Administration. Scientific and Technical Information Program
National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1992 - Science - 14 pages
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constant rate control gains Control system block CROSS-ELEVATION ANGLE rad cross-elevation axis cross-elevation error signal cross-elevation gimbal cross-elevation servo DEFINITION AND DESIGN electronic-hardware block diagram elevation and cross-elevation elevation angle elevation axis elevation servo error signals scanning Figure 13 Filter PWM friction ft-lb gimbal angle error Gimbal error signals gimbal servos 11 Gimbal torques scanning GIMBALED PAYLOADS gravity vector I-beam Incremental Encoder Figure line and raster line scan low-pass filter mechanical configuration microcontroller one-g environment peak cross-elevation error peak elevation error peak power Power Amp A/D power required rad/s Raster scan profile rate is commanded Rotating unbalanced-mass RUM RUM angle RUM devices RUM experiment RUM rates scanning RUM servos RUM's and gimbal sample rate scan motion scan profile scanning scanning with gimbal SCANNING WITH ROTATING scanning with RUM's servo designs servos only 13 shown in figure simulation results slug-ft2 system block diagram tachometers TEST RASTER SCANNING torque motor torquers