Abstract
A contact force tracking method based on variable impedance control was proposed to solve the problem of compliant contact of industrial robots in contact tasks. Firstly, the mathematical model between the contact force steady-state error and the impedance model parameters is analyzed according to the impedance control and second-order environment model. Secondly, the adaptive control rate of robot contact force error and damping parameters are established according to PD controller idea. Finally, the stability of the controller is verified by Routh criterion, and the stability range of the controller parameters is obtained. Experimental results show that compared with impedance control, variable damping impedance control has the characteristics of low overshoot, zero steady-state error, and rapid response, and can follow the dynamic expected force and adapt to the uncertain environment.
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Acknowledgement
This work is supported by the Technical Innovation Major Project of Hubei Province, China under Grant 2020AEA010, and the National Natural Science Foundation of China under Grants 61873248, the Natural Science Foundation of Hubei Province, China under Grant 2020CFA031, and the 111 project under Grant B17040, and the Science and Technology Project of State Grid Corporation of China under Grant 52153216000R.
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Gao, X., Chen, X. (2022). Surface Roughness Measurement of Ceramic Products Based on Impedance Control. In: Jia, Y., Zhang, W., Fu, Y., Zhao, S. (eds) Proceedings of 2022 Chinese Intelligent Systems Conference. CISC 2022. Lecture Notes in Electrical Engineering, vol 951. Springer, Singapore. https://doi.org/10.1007/978-981-19-6226-4_38
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DOI: https://doi.org/10.1007/978-981-19-6226-4_38
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