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Maneuver feel system for a rotary wing aircraft

  • US 5,213,282 A
  • Filed: 08/28/1991
  • Issued: 05/25/1993
  • Est. Priority Date: 08/28/1991
  • Status: Expired due to Term
First Claim
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1. A rotary wing aircraft flight control system which receives signals indicative of aircraft pitch rate, pitch attitude, bank angle and airspeed, and responds to a pitch command from a sidearm controller to control the pitch of an aircraft, comprising:

  • (a) means responsive to the airspeed signal and the pitch signal, for scheduling and providing a set point signal indicative of the desired aircraft pitch rate of change, which provides a constant sidearm controller force as a function of load factor on the main rotor;

    (b) means for computing the difference between said set point signal and the pitch rate signal, and for providing a pitch rate error signal indicative thereof;

    (c) inverse model means responsive to said set point signal for scheduling a feedforward command signal to drive the aircraft to respond in a manner which is essentially equal to said set point signal;

    (d) means responsive to said set point signal and the pitch attitude signal, comprising(1) means for providing maneuvering feel on the sidearm controller when the bank angle of the aircraft exceeds a predetermined value by conditioning said set point signal;

    (2) means for integrating over time said conditioned set point signal to provide a desired pitch attitude set point, for comparing said desired pitch attitude set point and the pitch attitude signal and providing a pitch attitude error signal indicative of the difference; and

    (e) means responsive to said pitch rate error signal, said feedforward command signal, and said pitch attitude error signal, for providing a pitch command signal to the main rotor of the aircraft.

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