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US 2014/0260517 A1Published application
System and method for inertial sensor offset compensation
AssigneeAutoliv ASP, Inc.
InventorJon D. Demerly
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Abstract
The present invention provides an improved method and system for compensation of inertial sensors. In one implementation a modified moving average is applied to provide dynamic offset compensation for an inertial sensor output that is calculated when a vehicle is in motion.
Claims22
A sensor compensation system for a motor vehicle comprising:
- an inertial sensor configured to measure a rate of a vehicle;
- a processing unit in communication with the inertial sensor;
- a memory unit operably coupled to the processing unit;
- and
- the processing unit including at least one module configured to:
- sample a series of data from the inertial sensor;
- calculate a modified moving average from the series of data and a current data sample from the series of data to calculate a compensation offset;
- and
- filter the compensation offset from the series of data to generate a compensated rate signal, wherein the memory unit stores a current average from the modified moving average to calculate a subsequent modified moving average for the series of data.
6 more elements
A method of compensation for an inertial sensor comprising:
- measuring a rate signal of a motor vehicle;
- calculating an inertial sensor compensation offset including:
- sampling a series of data from the rate signal;
- calculating a dynamic modified moving average from the series of data measured in response to the vehicle in motion, and a static modified moving average in response the vehicle being stopped to calculate a compensation offset;
- filtering the compensation offset from the rate signal;
- and
- generating a compensated rate signal.
4 more elements
A method of compensation for an inertial sensor comprising:
- measuring a rate signal of a motor vehicle;
- processing a sensor compensation routine including:
- sampling a series of data from the rate signal;
- calculating a moving average from the series of data and a current data sample of the data to calculate a compensation offset;
- filtering the compensation offset from the rate signal;
- and
- generating a compensated rate signal, wherein the rate signal of the motor vehicle is sampled while the vehicle is in motion.
4 more elements
Dependencies are inferred from the claim text.