Factorization-based calibration method for MEMS inertial measurement unit

13 years 10 months ago

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— We present an easy-to-use calibration method for MEMS inertial sensor units based on the Factorization method which was originally invented for shape-and-motion recovery in computer vision. Our method requires no explicit knowledge of individual motions applied during calibration procedure. Instead a set of motion constraints in the form of an innerproduct is used to factorize sensor measurements into a calibration matrix (that represents intrinsic sensor parameters) and a motion matrix (that represents acceleration or angular velocity). These motion constraints can be collected quickly from a lowcost calibration apparatus. Our method is not limited to just triad conﬁgurations but also applicable to any coordination of more than three sensor elements. A redundant conﬁguration has the beneﬁt that all the calibration parameters including biases are estimated at once. Simulation and experiments are provided to verify the proposed method.

Myung Hwangbo, Takeo Kanade

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