Fuzzy logic system-based force tracking control of robot in highly dynamic environments
ISSN: 0143-991X
Article publication date: 15 February 2024
Issue publication date: 2 July 2024
Abstract
Purpose
The study aims to equip robots with the ability to precisely maintain interaction forces, which is crucial for tasks such as polishing in highly dynamic environments with unknown and varying stiffness and geometry, including those found in airplane wings or thin, soft materials. The purpose of this study is to develop a novel adaptive force-tracking admittance control scheme aimed at achieving a faster response rate with higher tracking accuracy for robot force control.
Design/methodology/approach
In the proposed method, the traditional admittance model is improved by introducing a pre-proportional-derivative controller to accelerate parameter convergence. Subsequently, the authors design an adaptive law based on fuzzy logic systems (FLS) to compensate for uncertainties in the unknown environment. Stability conditions are established for the proposed method through Lyapunov analysis, which ensures the force tracking accuracy and the stability of the coupled system consisting of the robot and the interaction environment. Furthermore, the effectiveness and robustness of the proposed control algorithm are demonstrated by simulation and experiment.
Findings
A variety of unstructured simulations and experimental scenarios are designed to validate the effectiveness of the proposed algorithm in force control. The outcomes demonstrate that this control strategy excels in providing fast response, precise tracking accuracy and robust performance.
Practical implications
In real-world applications spanning industrial, service and medical fields where accurate force control by robots is essential, the proposed method stands out as both practical and straightforward, delivering consistently satisfactory performance across various scenarios.
Originality/value
This research introduces a novel adaptive force-tracking admittance controller based on FLS and validated through both simulations and experiments. The proposed controller demonstrates exceptional performance in force control within environments characterized by unknown and varying.
Keywords
Acknowledgements
This work was supported in part by the National Natural Science Foundation of China under grant 52375041, in part by the National Key Research and Development Project of China under grant 2022YFB3404804, in part by the Fundamental Research Funds for the Central Universities under grants 2023CDJXY-021 and 2019CDCG0002, and in part by China Scholarship Council under grant CSC202306050084.
Citation
Liu, C., Li, J., Li, Z. and Chen, X. (2024), "Fuzzy logic system-based force tracking control of robot in highly dynamic environments", Industrial Robot, Vol. 51 No. 4, pp. 536-548. https://doi.org/10.1108/IR-12-2023-0312
Publisher
:Emerald Publishing Limited
Copyright © 2024, Emerald Publishing Limited