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Inertial measurement unit fault detection isolation reconfiguration using parity logic

  • US 7,805,245 B2
  • Filed: 04/18/2007
  • Issued: 09/28/2010
  • Est. Priority Date: 04/18/2007
  • Status: Active Grant
First Claim
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1. A method of implementing a fault-tolerant-avionic architecture in a vehicle comprising:

  • using parity logic to monitor the functionality of at least three non-fault-tolerant inertial measurement units during a parity check, each inertial measurement unit comprising at least one triad of sensors;

    calculating a threshold from expected inertial measurement unit performance during a parity check; and

    if a failure of an inertial measurement unit is detected based on the calculated threshold, identifying the failed inertial measurement units based on a direction of a parity vector in parity space.

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