Patent ID: 6041273
Filing Date: 2000-03-21
Classification: B64D,G05D

Abstract:
An emergency control servo system for using thrust modulation for longitudinal control of a multiengine aircraft having a throttle servo for control of all engines in unison, comprisingmeans for independently entering a flightpath angle command to be maintained and producing a flightpath angle command signal .gamma.c,means for continually sensing said aircraft flightpath angle and producing a flightpath angle signal .gamma.,means for producing a flightpath error signal .gamma.e as a fiction of the difference between said flightpath angle command .gamma.c and said sensed aircraft flightpath angle .gamma.,means for forming a limited integral as a function of said error signal andmeans for adding said integral to said error signal for producing an output control signal for said throttle servo, thereby to adjust thrust of said engines to reduce said error signal .gamma.e toward zero.