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Method and apparatus for correcting drift errors in an angular rate sensor

  • US 5,297,028 A
  • Filed: 08/27/1991
  • Issued: 03/22/1994
  • Est. Priority Date: 08/27/1991
  • Status: Expired due to Term
First Claim
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1. An angular rate sensor for a vehicle comprising:

  • means for measuring an angular rate;

    means for measuring a temperature related to an environmental temperature to which said angular rate sensor is exposed;

    means, effective when said vehicle is stopped, for measuring a null voltage of said means for measuring an angular rate;

    said null voltage being an output voltage, of said means for measuring an angular rate, when said vehicle is stopped;

    table means for storing a plurality of said null voltages together with corresponding measurements of a plurality of said environmental temperatures made at the time said null voltages are stored; and

    means, effective during motion of said vehicle, for compensating an output of said means for measuring an angular rate with a null voltage from said table means corresponding to an environmental temperature measured at a time of said compensating.

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