Abstract
In engineering applications, high-precision tracking control is crucial for robotic manipulators to successfully complete complex operational tasks. To achieve this goal, this study proposes an adaptive tunable predefined-time backstepping control strategy for uncertain robotic manipulators with external disturbances and model uncertainties. By establishing a novel practical predefined-time stability criterion, a tunable predefined-time backstepping controller is systematically presented, allowing the upper bound of tracking error settling time to be precisely determined by adjusting only one control parameter. To accurately address lumped uncertainty, two updating laws are designed: a fuzzy weight updating law and a boundary adaptive updating law, which together reduce dependence on system model knowledge. In addition, the singularity problem in the predefined-time design process is effectively avoided by constructing the hyperbolic tangent function. The efficacy of the proposed control strategy is verified through numerical simulations.
Funding
This work was supported in part by the National Natural Science Foundation of China under Grant 62203384, Grant 62222315 and Grant 62403426; in part by the Zhejiang Provincial Nature Science Foundation of China under Grant MS25F030011 and LZ22F030007.
Cite This Article
APA Style
Shi, H., Xie, S., Chen, Q., Hu, S., & Yi, S. (2024). Adaptive Tunable Predefined-Time Backstepping Control for Uncertain Robotic Manipulators. IECE Transactions on Sensing, Communication, and Control, 1(2), 126–135. https://doi.org/10.62762/TSCC.2024.672831
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