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Servo loop control for a coriolis rate sensor dither drive

  • US 4,814,680 A
  • Filed: 08/21/1987
  • Issued: 03/21/1989
  • Est. Priority Date: 08/21/1987
  • Status: Expired due to Fees
First Claim
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1. A dither drive controller for a Coriolis rate sensor, comprising:

  • (a) position sensing means for sensing a dither position of the Coriolis rate sensor as it is driven to vibrate by the dither drive, and for producing a signal indicative of the dither position;

    (b) means for determining a dither velocity of the Coriolis rate sensor from the signal produced by the position sensing means and for producing a signal indicative of said dither velocity;

    (c) means for providing a dither drive signal at a predetermined frequency;

    (d) means for producing dither velocity aiding and acceleration aiding signals;

    (e) control means, connected to receive and add the dither position and velocity signals, the dither drive signal, and the dither velocity aiding and acceleration aiding signals, for producing an output signal for energizing the dither drive to vibrate the Coriolis rate sensor at said predetermined frequency, and at a constant, stable amplitude, as a function of the sum of all these signals.

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