Journal of Institute of Control, Robotics and Systems (제어로봇시스템학회논문지)

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Development of 3-Dimensional Pose Estimation Algorithm using Inertial Sensors for Humanoid Robot

관성 센서를 이용한 휴머노이드 로봇용 3축 자세 추정 알고리듬 개발

  • 이아람 (서울산업대학교 기계설계자동화공학부 정밀기계기술연구소) ;
  • 김정한 (서울산업대학교 기계설계자동화공학부 정밀기계기술연구소)
  • Published : 2008.02.01
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Abstract

In this paper, a small and effective attitude estimation system for a humanoid robot was developed. Four small inertial sensors were packed and used for inertial measurements(3D accelerometer and three 1D gyroscopes.) An effective 3D pose estimation algorithm for low cost DSP using an extended Kalman filter was developed and evaluated. The 3D pose estimation algorithm has a very simple structure composed by 3 modules of a linear acceleration estimator, an external acceleration detector and an pseudo-accelerometer output estimator. The algorithm also has an effective switching structure based on probability and simple feedback loop for the extended Kalman filter. A special test equipment using linear motor for the testing of the 3D pose sensor was developed and the experimental results showed its very fast convergence to real values and effective responses. Popular DSP of TMS320F2812 was used to calculate robot's 3D attitude and translated acceleration, and the whole system were packed in a small size for humanoids robots. The output of the 3D sensors(pitch, roll, 3D linear acceleration, and 3D angular rate) can be transmitted to a humanoid robot at 200Hz frequency.

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References

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  2. Tilt Angle Estimation of Plane with a Pair of Accelerometers and a Gyroscope vol.23, pp.11, 2013, https://doi.org/10.5050/KSNVE.2013.23.11.966
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