Practical methods of calculation involved in the experimental study of an autopilot and the autopilot-aircraft combination

Louis H. Smaus, Elwood C. Stewart
Jun 1951

Practical methods are presented for making the various calculations required for the analysis of an autopilot and an autopilot-aircraft combination from frequency-response data. Equations are derived for determining the servo-system error voltage for both displacement input signal and displacement plus rate of displacement input signals, the autopilot frequency response for addition of rate of displacement input signal, the servo-system frequency response for a change of gain, and the relation between open-loop and closed-loop frequency responses for the servo-system and for the autopilot-aircraft combination.

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