×

Doppler heading attitude reference system

  • US 4,070,674 A
  • Filed: 10/15/1976
  • Issued: 01/24/1978
  • Est. Priority Date: 10/17/1973
  • Status: Expired due to Term
First Claim
Patent Images

1. A control system for use in an aircraft, or the like comprising:

  • an inertial heading reference unit mounted on the aircraft and including accelerometer means and associated circuit means for providing first acceleration signals in horizontal coordinates;

    a controlled unit mounted on the aircraft remote from the inertial heading reference unit and including accelerometer means for producing second acceleration signals and vertical gyroscope means for producing pitch and roll signals;

    transforming circuit means coupled to said controlled unit and responsive to said second acceleration signals and controlled by said pitch and roll signals for transforming said second acceleration signals into second accelerations signals in horizontal coordinates; and

    computer means coupled to said heading reference unit and to said transforming circuit means for comparing the first and second acceleration signals in the horizontal coordinates to produce pitch and roll error signals to compensate for pitch and roll errors in said vertical gyroscope.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×