Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Robust Impedance Control of High-DOF Robot Based on ISMC and DOB

ISMC와 외란관측기 기반 고자유도 로봇의 강인한 임피던스제어

  • Asignacion, Abner Jr. (Department of Electrical Engineering, Changwon National University) ;
  • Park, Seung-kyu (Department of Electrical Engineering, Changwon National University) ;
  • Kim, Min-chan (Department of Electrical Engineering, Changwon National University)
  • Received : 2016.10.13
  • Accepted : 2016.11.01
  • Published : 2017.01.31
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Abstract

This paper proposes a robust impedance controller for high-DOF robots. The model-based control of a higher DOF robot uses a numerical dynamic model because the analytical dynamic model is difficult to be derived and this means that modeling error is inevitable. The impedance control in the task space is affected by joint motions and has more difficulties in the higher DOF robots. In addition, the disturbances must be decoupled in the control of high DOF robot. This paper proposes a robust impedance controller based on integral sliding mode control (ISMC) and disturbance observer(DOB) for high-DOF robot manipulator. The ISMC is used to improve the robustness of the impedance control and to preserve its nominal performance. DOB is also employed to cancel the effects of input disturbances and to reduce the maximum gain of the ISMC which eventually determines the input chattering size.

본 논문은 고자유도의 로봇에 대한 강인한 임피던스제어를 제안한다. 자유도가 높은 로봇에 대해서 동특성기반으로 제어하기 위해서는 해석적인 로봇의 동특성확보가 거의 불가능하기 때문에 수치해석적인 모델을 사용하게 된다. 이에 근본적으로 모델링오차가 존재하고 작업공간에서 임피던스제어기를 설계하는 경우에 많은 개수의 관절의 움직임의 영향을 받기 때문에 강인제어의 필요성이 더욱 절실하다. 이에 모델링 불확실성과 외란의 존재와 상관없이 원하는 임피던스를 유지하기 위해서는 공칭계통의 동특성에 슬라이딩모드의 강인성을 추가할 수 있는 적분슬라이딩모드제어를 도입하였고 입력외란의 영향을 제거할 수 있는 외란 관측기를 동시에 적용한 강인한 임피던스제어기를 제안하였다. 외란과 모델 불확실성이 존재함에도 불구하고 공칭계통을 기반으로 한 임피던스제어기의 특성을 그대로 유지할 수 있는 제어기가 설계되었다.

Keywords

References

  1. N. Hogan, "Impedance Control: An Approach to Manipulation," American Control Conference, pp. 304-313, 1984.
  2. S. P. Chan, B. Yao, W. B. Gao, and M. Cheng, "Robust Impedance Control of Robot Manipulators," International Journal of Robotics and Automation, vol. 6, no. 4, pp. 220-227, Dec. 1991.
  3. X. Dong, Z. Shaoguang, L. Xuerong, L. Min, and W. Hongxing, "Impedance Control of Robot Manipulator with Model Reference Torque Observer," in Proceedings of the 2013 IEEE 8th International Conference on Industrial Electronics and Applications, pp. 994-998, 2013.
  4. R. Platt, M. Abdallah, and C. Wamplet, "Multiple-priority impedance control," in Proceedings of the 2011 IEEE International Conference on Robotics and Automation, pp. 6033-6038, 2011.
  5. Y. C. Tsai, "Robust Impedance Control of Pressure-Sensor Free Pneumatic Servo Systems," in Proceedings of the 2011 IEEE International Conference on Electric Information and Control Engineering, pp. 2549-2553, 2011.
  6. C. Schindlbeck and S. Haddadin, "Unified Passivity-Based Cartesian Force/Impedance Control for Rigid and Flexible Joint Robots via Task-Energy Tanks," in Proceedings of the 2015 IEEE International Conference on Robotics and Automation, pp. 440-447, 2015.
  7. F. Caccavale, P. Chiacchio, and A. Marino, "Six-DOF Impedance Control of Dual-Arm Cooperative Manipulators," IEEE/ASME Transactions On Mechatronics, vol. 13, no. 5, pp. 576-586, Oct. 2008. https://doi.org/10.1109/TMECH.2008.2002816
  8. R. Naoual, E. M. Mellouli, and I. Boumhidi, "Adaptive fuzzy sliding mode control for the two-link robot," in Proceedings of IEEE 9th International Conference on Intelligent Systems: Theories and Applications, pp. 1-6, 2014.
  9. J. Baek, M. Jin, and S. Han, "A new Adaptive Sliding-Mode Control Scheme for Application to Robot Manipulator," IEEE Transactions on Industrial Electronics, vol. 63, no. 6, pp. 3628-3637, Jun. 2016. https://doi.org/10.1109/TIE.2016.2522386
  10. Y. W. Liang, S. D. Xu, and T. C. Chu, "Robust Control of the Robot Manipulator via an Improved Sliding Mode Scheme," in Proceedings of the 2007 IEEE International Conference on Mechatronics and Automation, pp. 1593-1598, 2007.
  11. R. A Silva Viego and R. S Ashok, "Comparative Study of PD Controller (Vs.) Integral Sliding Mode Control on 5-Link 2 DOF Planar," in Proceedings of IEEE Southeastcon, pp. 1-6, 2013.
  12. D. S. You, "Integral Sliding Mode Control for Robot Manipulators," Journal of Institute of Control, Robotics and Systems, vol. 14, no. 12, pp.1266-1269, Dec. 2008. https://doi.org/10.5302/J.ICROS.2008.14.12.1266
  13. V. Utkin, J. Shi, "Integral Sliding Mode in Systems Operating under Uncertainty Conditions," in Proceedings of the 35th IEEE Conference on Decision and Control, vol. 4, pp. 4591-4596, 1996.
  14. S. G. Khan and J. Jalani, "Realisation of model reference compliance of a humanoid robot arm via integral sliding mode control," International Journal of Mechanical Sciences, vol. 7, no. 1, pp. 1-8, Jan. 2016. https://doi.org/10.5194/ms-7-1-2016
  15. J. N. Yun and J. B. Su, "Design of a Disturbance Observer for a Two-Link Manipulator with Flexible Joints," IEEE Transactions on Control Systems Technology, vol. 22, no. 2, pp. 809-815, Mar. 2014. https://doi.org/10.1109/TCST.2013.2248733
  16. M. J. Kim, and W. K. Chung, "Disturbance-Observer-Based PD Control of Flexible Joint Robots for Asymptotic Convergence," IEEE Transactions on Robotics, vol. 31, no. 6, pp. 1508-1516, Dec. 2015. https://doi.org/10.1109/TRO.2015.2477957
  17. S. Oh, H. Woo, and K. Kong, "Frequency-Shaped Impedance Control for Safe Human-Robot Interaction in Reference Tracking Application," IEEE/ASME Transactions on Mechatronics, vol. 19, no. 6, pp. 1907-1916, Dec. 2014. https://doi.org/10.1109/TMECH.2014.2309118
  18. O. Khatib, "A Unified Approach to Motion and Force Control of Robot Manipulators: The Operational Space Formulation," IEEE Journal on Robotics Research, vol. 3, no. 1, pp. 43-53, Feb. 1987.
  19. Y. J. Choi, K. J. Yang, W. K. Kyun, H. R. Kim, and I. L. Suh, "On the Robustness and Performance of Disturbance Observers for Second-Order Systems," IEEE Transactions on Automatic Control, vol. 48, no. 2, pp. 315-320, Feb. 2003. https://doi.org/10.1109/TAC.2002.808491
  20. O. Khatib, L, Sentis, J. Park, and J. Warren, "Whole-Body Dynamic Behavior And Control Of Human-Like Robots," International Journal of Humanoid Robotics, vol. 1, no. 1, pp. 29-43, Mar. 2004. https://doi.org/10.1142/S0219843604000058
  21. A. Abner, S. K. Park, and G. P. Kwak , "ISMC and DOB Based Robust Impedance Control of High-DOF Robot in Task Space," in Proceeding of KIEE Summer Annual Conference, pp. 1402-1403, 2016.

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