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Yaw damping system and method for aircraft

  • US 8,620,492 B2
  • Filed: 02/27/2012
  • Issued: 12/31/2013
  • Est. Priority Date: 02/27/2012
  • Status: Active Grant
First Claim
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1. A method for damping the dutch roll mode in an aircraft having a roll control surface, comprising the steps of:

  • measuring at least one parameter of the motion of the aircraft;

    applying a washout filter to the at least one parameter of motion;

    calculating a damping signal that is proportional to the at least one parameter of the motion of the aircraft; and

    actuating the roll control surface in proportion to the damping signal;

    wherein the step of calculating a damping signal further comprises multiplying the at least one parameter of motion by a proportional gain;

    wherein the step of calculating a damping signal further comprises the steps of calculating a derivative function of the at least one parameter of motion;

    multiplying the derivative function by a proportional gain; and

    adding the result to the damping signal;

    wherein the step of calculating a damping signal further comprises the steps of calculating an integral function of the at least one parameter of motion;

    multiplying the integral function by a proportional gain; and

    adding the result to the damping signal;

    wherein the at least one parameter of motion is selected from the group consisting of lateral acceleration, sideslip angle, true airspeed, bank angle and yaw rate; and

    wherein the step of calculating a damping signal further comprises the steps of measuring the roll rate of the aircraft;

    multiplying the roll rate by a proportional gain; and

    adding the result to the damping signal.

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