Journal of System Simulation ›› 2021, Vol. 33 ›› Issue (4): 867-874.doi: 10.16182/j.issn1004731x.joss.19-0646

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Compensation Sliding Cross Coupling Control Research of Cartesian Coordinate Robot

Wang Wei1, Chen Zhimei2,*, Wang Zhenyan3   

  1. School of Electronic Information Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China
  • Received:2019-12-11 Revised:2020-05-20 Online:2021-04-18 Published:2021-04-14

Abstract: For a typical Cartesian coordinate robot controls precision is low, based on a single-axis mathematical model, a contour error model for a typical robot whose axes are orthogonal to each other is established. An improved double-power approach law is used to design a terminal sliding mode controller to improve the robot. The integral compensation terms are added to stably compensate the position accuracy of each axis to improve the overall trajectory tracking accuracy, and the cross-coupling control between the axes is used to eliminate the contour error between the axes. It not only weakens the chattering of traditional sliding mode control, but also improves the response speed of the system and enhances the robustness of the system. The feasibility of the compensated sliding mode cross-coupling controller is verified by simulation experiments. The controller has practical application value in engineering.

Key words: robot, sliding mode control, cross coupling, integral compensation

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