NASA NTRS · 19760000020
Sensor for analog speed controls
Abstract
System has speed control accuracy within approximately 0.001 percent. Accuracy is limited only by crystal reference oscillator; however, effect is negligible on original system stability and transient response. Design can be adapted to other systems and provides compromise between either fully digital or fully analog systems.
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Birchenough, A. G.. 1976-03-01. Sensor for analog speed controls. https://ntrs.nasa.gov/citations/19760000020
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