Abstract
Robotic force control is crucial for precise polishing and has a significant influence on the final effects. The blade has a free-form surface in space, and the curvature changes drastically, making traditional impedance control feedback untimely. To solve this problem, this paper proposes an adaptive impedance control method for blade polishing based on Kalman filter. The force data is denoised by Kalman filtering to obtain the real force data, then the data is gravity compensated to obtain the real polishing force. The method analyzes the influences of stiffness change and displacement change on the polishing force, and establishes a stiffness and displacement coupling compensation model. The method achieves timely feedback when the robot copes with unknown environmental stiffness changes. In addition, the Lyapunov function is applied to verify the stability of the method during implementation. Four processing conditions are simulated by using Matlab Simulink. The results indicate that the proposed method can provide faster response and higher force tracking accuracy by adjusting the reference position when the environment changes. In the experiment of polishing blade, the roughness is reduced to below Ra0.32 μm and fluctuation range of polishing force is within ±1 N. The force control method performance is significantly improved and the blade surface quality is effectively improved.
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This work was supported by the National Natural Science Foundation of China (Grant No. 52105474 and Grant No. 52375460) and The Shanxi Scholarship Council of China.
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The proposal and realization of this technology were mainly completed by Xuhui Zhao. Jia Liu provided machine tools and experimental conditions and participated in technical discussions. Shengqiang Yang provided guidance on research directions. Jingjing Zhang, Xufeng Lv, Long Cheng, and Xueqian Zhang participated in the research.
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Jia Liu has received research support from the funding. Xuhui Zhao, Shengqiang Yang, Jingjing Zhang, Xufeng Lv, Long Cheng, and Xueqian Zhang did not get paid from the funding.
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Zhao, X., Liu, J., Yang, S. et al. An adaptive impedance control method for blade polishing based on the Kalman filter. Int J Adv Manuf Technol 132, 1723–1739 (2024). https://doi.org/10.1007/s00170-024-13401-5
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DOI: https://doi.org/10.1007/s00170-024-13401-5