DIAGNOSTIC METHOD FOR USE WITH A VEHICLE DYNAMIC CONTROL SYSTEM (VDCS)
First Claim
1. A method for validating sensor readings in a vehicle dynamic control system (VDCS), comprising the steps of:
- (a) receiving a first sensor reading from a first vehicle sensor;
(b) validating the first sensor reading with an intra-parameter evaluation that utilizes the first sensor reading;
(c) receiving a second sensor reading from a second vehicle sensor;
(d) validating the second sensor reading with an inter-parameter evaluation that utilizes the first and second sensor readings, wherein the first sensor reading is already validated;
(e) receiving a third sensor reading from a third vehicle sensor; and
(f) validating the third sensor reading with an inter-parameter evaluation that utilizes the second and third sensor readings, wherein the second sensor reading is already validated.
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Accused Products
Abstract
A diagnostic method for improving the reliability, accuracy, efficiency and/or robustness of a vehicle dynamic control system (VDCS) by providing analytical redundancy for one or more sensor readings. Sensor readings such as wheel speed, yaw rate, lateral acceleration, longitudinal acceleration and steering angle are oftentimes related to one another. Thus, the diagnostic method may use these dynamic relationships to detect faults in the sensor readings without having to add additional redundant hardware or use complex circular logic structures, which can increase the cost and impose processing burdens on the VDCS. In an exemplary embodiment, the diagnostic method checks for faulty sensor readings through a process of analytical redundancy that includes intra- and inter-parameter evaluations having linear and forward dependencies.
18 Citations
21 Claims
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1. A method for validating sensor readings in a vehicle dynamic control system (VDCS), comprising the steps of:
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(a) receiving a first sensor reading from a first vehicle sensor; (b) validating the first sensor reading with an intra-parameter evaluation that utilizes the first sensor reading; (c) receiving a second sensor reading from a second vehicle sensor; (d) validating the second sensor reading with an inter-parameter evaluation that utilizes the first and second sensor readings, wherein the first sensor reading is already validated; (e) receiving a third sensor reading from a third vehicle sensor; and (f) validating the third sensor reading with an inter-parameter evaluation that utilizes the second and third sensor readings, wherein the second sensor reading is already validated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for validating sensor readings in a vehicle dynamic control system (VDCS), comprising the steps of:
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(a) receiving a plurality of wheel speed readings from a plurality of wheel speed sensors; (b) verifying the accuracy of each of the wheel speed readings by comparing the wheel speed readings to each other; (c) receiving a yaw rate reading from a yaw rate sensor; (d) determining a yaw rate estimate based on the already verified wheel speed readings, and verifying the accuracy of the yaw rate reading if the yaw rate reading corresponds with the yaw rate estimate; (e) receiving an addition reading from an additional vehicle sensor; and (f) determining an estimate for the additional reading based on the already verified yaw rate reading, and verifying the accuracy of the additional reading if the additional reading corresponds with the additional reading estimate. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification