Integrated rate isolation sensor
First Claim
1. A system for providing fault-tolerant inertial measurement data, the system comprising:
- a sensor, having less accuracy than an inertial measurement unit, for measuring an inertial parameter; and
a processor for (i) detecting whether a difference exists between a first data stream received from a first inertial measurement unit and a second data stream received from a second inertial measurement unit, and (ii) upon detecting a difference, determining whether at least one of the first or second inertial measurement units has failed by comparing each of the first and second data streams to the inertial parameter.
3 Assignments
0 Petitions
Accused Products
Abstract
In one embodiment, a system for providing fault-tolerant inertial measurement data includes a sensor for measuring an inertial parameter and a processor. The sensor has less accuracy than a typical inertial measurement unit (IMU). The processor detects whether a difference exists between a first data stream received from a first inertial measurement unit and a second data stream received from a second inertial measurement unit. Upon detecting a difference, the processor determines whether at least one of the first or second inertial measurement units has failed by comparing each of the first and second data streams to the inertial parameter.
34 Citations
26 Claims
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1. A system for providing fault-tolerant inertial measurement data, the system comprising:
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a sensor, having less accuracy than an inertial measurement unit, for measuring an inertial parameter; and a processor for (i) detecting whether a difference exists between a first data stream received from a first inertial measurement unit and a second data stream received from a second inertial measurement unit, and (ii) upon detecting a difference, determining whether at least one of the first or second inertial measurement units has failed by comparing each of the first and second data streams to the inertial parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A processor for providing fault-tolerant inertial measurement data, the processor comprising:
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at least one input for receiving first and second data streams from first and second inertial measurement unit, respectively; circuitry for (i) detecting whether a difference exists between the first and second data streams, and (ii) upon detecting a difference, determining whether at least one of the first or second inertial measurement units has failed by comparing each of the first and second data streams to the output of a sensor having less accuracy than the first and second inertial measurement units; and an output for providing inertial measurement data based on the determination. - View Dependent Claims (12, 13, 14, 15)
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16. A fault-tolerant system for determining a position of a vehicle, the system comprising:
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a first inertial measurement unit for providing a first rate stream; a second inertial measurement unit for providing a second rate stream; a sensor, having less accuracy than the first and second inertial measurement units, for measuring an inertial parameter; and a processor for (i) detecting whether a difference exists between the first and second rate streams, and (ii) upon detecting a difference, determining whether at least one of the first or second inertial measurement units has failed by comparing each of the first and second rate streams to the inertial parameter. - View Dependent Claims (17, 18, 19)
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20. A method for providing fault-tolerant inertial measurement data, the method comprising:
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receiving, at a processor, a first data stream from a first inertial measurement unit and a second data stream from a second inertial measurement unit; detecting whether a difference between the first and second data streams exists; upon detecting a difference, determining whether at least one of the first or second inertial measurement units has failed by comparing each of the first and second data streams to an output of a sensor having less accuracy than the first and second inertial measurement units; and implementing a corrective action upon determining that an inertial measurement unit has failed. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification