Method for the Determination of Long-Term Offset Drifts of Acceleration Sensors in Motor Vehicles
First Claim
1. A method for determining long-term offset drifts of an acceleration sensor in a motor vehicle, with the method comprising the steps:
- determining a longitudinal vehicle speed in a center of gravity of the vehicle;
calculating a first share of driving dynamics for a longitudinal reference acceleration as well as a second share of driving dynamics for a transverse reference acceleration from the longitudinal vehicle speed and a yaw rate;
calculating a third share of driving dynamics in a reference acceleration in a plane by transforming the first and second share for the position and orientation of the acceleration sensor;
determining a long-term offset drift of the acceleration sensor from measured values of the acceleration sensor and the third share of driving dynamics in the reference acceleration by means of a situation-dependent averaging process.
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Abstract
A method for determining long-term offset drifts of acceleration sensors in a motor vehicle has the steps:—the longitudinal vehicle speed Vx is determined in the vehicle'"'"'s center of gravity;—the share of the driving dynamics in the longitudinal reference acceleration formula (I) and in the transversal reference acceleration formula (II) is calculated from the longitudinal vehicle speed Vx and the yaw rate ωZ;—the share of the driving dynamics in the reference acceleration on the vehicle level formula (III) is calculated by converting the driving dynamic reference accelerations formula (IV) calculated for the center of gravity to the position formula (V) and the orientation Θ of the sensor formula (VI);—the long-term offset drift of the sensor is determined from the measured values of the sensor and the share of the measured value in the driving dynamics by means of a situation-dependent averaging process.
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Citations
20 Claims
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1. A method for determining long-term offset drifts of an acceleration sensor in a motor vehicle, with the method comprising the steps:
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determining a longitudinal vehicle speed in a center of gravity of the vehicle; calculating a first share of driving dynamics for a longitudinal reference acceleration as well as a second share of driving dynamics for a transverse reference acceleration from the longitudinal vehicle speed and a yaw rate; calculating a third share of driving dynamics in a reference acceleration in a plane by transforming the first and second share for the position and orientation of the acceleration sensor; determining a long-term offset drift of the acceleration sensor from measured values of the acceleration sensor and the third share of driving dynamics in the reference acceleration by means of a situation-dependent averaging process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device for determining long-term offset drifts of an acceleration sensor in a motor vehicle, comprising:
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means for determining a longitudinal vehicle speed in a center of gravity of the vehicle; means for calculating a first share of driving dynamics for a longitudinal reference acceleration as well as a second share of driving dynamics for a transverse reference acceleration from the longitudinal vehicle speed and a yaw rate; means for calculating a third share of driving dynamics in a reference acceleration in a plane by transforming the first and second share for the position and orientation of the acceleration sensor; means for determining a long-term offset drift of the acceleration sensor from measured values of the acceleration sensor and the third share of driving dynamics in the reference acceleration by means of a situation-dependent averaging process. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification