FAULT DETECTION, ISOLATION, AND RECONFIGURATION OF INERTIAL MEASUREMENT UNIT USING PARITY LOGIC

摘要

PROBLEM TO BE SOLVED: To inertial measurement of fault-tolerance inexpensively. SOLUTION: A method of implementing a fault-tolerant avionics architecture in a vehicle includes using parity logic to monitor the functionality of at least three non-fault-tolerant inertial measurement units during a parity check and calculating a threshold from expected inertial measurement unit performance during a parity check. If a failure of the inertial measurement unit is detected based on the calculated threshold, then the method further includes identifying the failed inertial measurement unit based on a direction of a parity vector in parity space. Each inertial measurement unit comprises at least one triad of sensors. COPYRIGHT: (C)2009,JPO&INPIT