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Method for the Determination of Long-Term Offset Drifts of Acceleration Sensors in Motor Vehicles

  • US 20090037129A1
  • Filed: 09/08/2006
  • Published: 02/05/2009
  • Est. Priority Date: 11/14/2005
  • Status: Active Grant
First Claim
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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:

  • 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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