NASA NTRS · 19830026731
Servo Controlled Variable Pressure Modification to Space Shuttle Hydraulic Pump
Abstract
Engineering drawings show modifications made to the constant pressure control of the model AP27V-7 hydraulic pump to an electrically controlled variable pressure setting compensator. A hanger position indicator was included for continuously monitoring hanger angle. A simplex servo driver was furnished for controlling the pressure setting servovalve. Calibration of the rotary variable displacement transducer is described as well as pump performance and response characteristics.
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Kouns, H. H.. 1983-07-25. Servo Controlled Variable Pressure Modification to Space Shuttle Hydraulic Pump. https://ntrs.nasa.gov/citations/19830026731
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