Method and system for correcting sensor offsets
First Claim
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1. A sensor offset correction method for a vehicle comprising:
- generating a first offset correction signal for a vehicle dynamic sensor at a sensor power-up;
generating a second offset correction signal for said vehicle dynamic sensor when the vehicle is moving; and
correcting said vehicle dynamic sensor in response to at least one of said first offset correction signal and said second offset correction signal.
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Abstract
A control system (18) for an automotive vehicle (19) having a vehicle body includes a cluster (16) of vehicle dynamic sensors (27, 28, 30, 31), the output signals from the sensors (Yaw Rate Sensor, Roll Rate Sensor, Longitudinal Acceleration Sensor, Lateral Acceleration Sensor) are corrected for errors by removing the zero output DC bias. Such bias constitutes an error that may occur as a result of temperature changes, manufacturing defects, or other factors. The system (18) also compensates for the drift in the sensor output signals that occur during vehicle operation.
142 Citations
23 Claims
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1. A sensor offset correction method for a vehicle comprising:
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generating a first offset correction signal for a vehicle dynamic sensor at a sensor power-up;
generating a second offset correction signal for said vehicle dynamic sensor when the vehicle is moving; and
correcting said vehicle dynamic sensor in response to at least one of said first offset correction signal and said second offset correction signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A sensor offset correction method for a vehicle comprising:
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generating a first offset correction signal for a vehicle dynamic sensor at a sensor power-up in response to a DC bias;
generating a temperature drift signal for said sensor;
generating a second offset correction signal for said vehicle dynamic sensor when the vehicle is moving in response to said temperature drift signal;
generating a third offset correction signal for said vehicle dynamic sensor when the vehicle is at rest and said vehicle dynamic sensor is below an accuracy threshold; and
correcting said vehicle dynamic sensor in response to said first offset correction signal, said second offset correction signal and said third offset correction signal. - View Dependent Claims (20, 21, 22)
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23. A control system for an automotive vehicle having a vehicle body comprising:
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a cluster of vehicle dynamic sensors positioned within the vehicle body adapted to generate a plurality of vehicle dynamic signals; and
a controller adapted to receive said plurality of vehicle dynamic signals, said controller further adapted to generate a first offset correction signal for one of said cluster of said vehicle dynamic sensors in response to a DC bias and at a sensor power-up, said controller further adapted to generate a second offset correction signal for said one of said cluster of said vehicle dynamic sensors in response to a signal equivalent to a temperature drift signal and when the vehicle is moving, said controller further adapted to generate a third offset correction signal for said one of said cluster of said vehicle dynamic sensors when the vehicle is at rest and said one of said cluster of said vehicle dynamic sensors is below an accuracy threshold, said controller further adapted to correct said one of said cluster of said vehicle dynamic sensors in response to said first offset correction signal, said second offset correction signal and said third offset correction signal.
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Specification