NASA NTRS · 19710000494
Pulse width-pulse rate modulator
Abstract
Attitude control system designed for rockets regulates duty cycle of pneumatic valves so less fuel is required. Operation time of each valve is directly proportional to error signal and the dead band about a null is controlled by independently adjustable threshold circuits.
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Cooke, W. A.. 1971-12-01. Pulse width-pulse rate modulator. https://ntrs.nasa.gov/citations/19710000494
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