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Bagging for Gaussian mixture regression in robot learning from demonstration

Author

Listed:
  • Congcong Ye

    (Huazhong University of Science and Technology)

  • Jixiang Yang

    (Huazhong University of Science and Technology)

  • Han Ding

    (Huazhong University of Science and Technology)

Abstract

Robot learning from demonstration (LfD) emerges as a promising solution to transfer human motion to the robot. However, because of the open-loop between the learner and task constraints, the precision of the reproduction at the desired task constraints cannot always be guaranteed and the model is not robust to changes of the training data. This paper proposes a closed-loop framework of LfD based on the bagging method of Gaussian Mixture Model and Gaussian Mixture Regression (GMM/GMR) to obtain a robust learner of LfD with high precision reproduction. The original demonstration data are divided into several sub-training data, from which multiple Gaussian mixture models are developed and combined through weighted average to provide predictions. A closed-loop is built between the reproduction of the combined learner and task constraints, and the weights that satisfy task constraints are estimated in the closed-loop. The prediction uncertainty of the models is automatically eliminated by the closed-loop, therefore, the low robustness of the LfD model to the training date is overcome. In experiments, tasks of the position and velocity are both constrained in dual closed-loop. It is shown that the proposed method can significantly meet the task constraints without increasing the complexity of the algorithm.

Suggested Citation

  • Congcong Ye & Jixiang Yang & Han Ding, 2022. "Bagging for Gaussian mixture regression in robot learning from demonstration," Journal of Intelligent Manufacturing, Springer, vol. 33(3), pages 867-879, March.
  • Handle: RePEc:spr:joinma:v:33:y:2022:i:3:d:10.1007_s10845-020-01686-8
    DOI: 10.1007/s10845-020-01686-8
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    References listed on IDEAS

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    1. Izabela Nielsen & Quang-Vinh Dang & Grzegorz Bocewicz & Zbigniew Banaszak, 2017. "A methodology for implementation of mobile robot in adaptive manufacturing environments," Journal of Intelligent Manufacturing, Springer, vol. 28(5), pages 1171-1188, June.
    2. Jun Ni & Wen Cheng Tang & Yan Xing, 2018. "Assembly process optimization for reducing the dimensional error of antenna assembly with abundant rivets," Journal of Intelligent Manufacturing, Springer, vol. 29(1), pages 245-258, January.
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