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Foot Motion Estimation Smoother using Inertial Sensors

관성센서를 사용한 발의 움직임 추정용 평활기

  • Received : 2011.12.13
  • Accepted : 2012.04.03
  • Published : 2012.05.01

Abstract

A foot motion is estimated using an inertial sensor unit, which is installed on a shoe. The inertial sensor unit consists of 3 axis accelerometer and 3 axis gyroscopes. Attitude and position of a foot are estimated using an inertial navigation algorithm. To increase estimation performance, a smoother is used, where the smoother employs a forward and backward filter structure. An indirect Kalman filter is used as a forward filter and backward filter. A new combining algorithm for the smoother is proposed to combine a forward indirect Kalman filter and a backward indirect Kalman filter. Through experiments, the estimation performance of the proposed smoother is verified.

Acknowledgement

Supported by : 울산대학교

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