Electricity: motive power systems – Positional servo systems – With stabilizing features
Patent
1993-07-26
1996-03-26
Ip, Paul
Electricity: motive power systems
Positional servo systems
With stabilizing features
318626, 318632, 318564, 244182, G05B 903, G05D 108
Patent
active
055023649
ABSTRACT:
An aircraft automatic throttle system is responsive to a throttle command signal to drive the aircraft throttle through a clutch and detent mechanism which allows for pilot override. Full throttle is achieved only if the throttle is driven against the stop position at the engine with a controlled, limited force. The instant invention is an improved servoamplifier system and method including a position sensor for sensing the position of the throttle, a summing circuit for summing the throttle command signal with the position sensor signal to produce an error signal and an amplifier for amplifying the error signal and producing an output signal to drive the servo driver. Unique signal processing is provided which monitors the amplifier output signal and detects a predetermined condition thereof representative of the throttle being driven against the forward stop at the engine. In response to detection of this condition, a control signal is applied to the summing circuit which results in the servo system driving the throttle against the stop position with a force which is controlled below a limit to assure stable, in-detent operation.
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IBM Technical Disclosure Bulletin, vol. 19, No. 12, Jul. 1976, pp. 659-600.
Blechen Frederick C.
Kelley Michael W.
Lyndon David K.
Hamley James P.
Ip Paul
The Boeing Company
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