Abstract
Many application areas call for robots to carry out tasks for human safety and work reliability. An aircraft skin inspection robot is introduced in this paper, which sticks to the surface of an aircraft by suction adhesion. Since the vibration during movement of the robot limits the measurement accuracy, the purpose of operating adsorption force is to ensure a smooth and fast movement of the robot. Firstly, a minimum adsorption force guaranteeing the safety of the robot is analyzed and an adsorption system with unmeasured states, unknown disturbances, and parameter uncertainties is presented. Secondly, an adaptive extended state observer (ESO) is developed not only to estimate the unmeasured states but also to eliminate the impact of the unknown disturbances and parameter uncertainties. Moreover, the problem of stochastic stability analysis for the estimated error system is also discussed. An adaptive ESO-based nonsingular terminal sliding mode control(NTSMC) is then presented by using Lyapunov synthesis. Finally, the simulation and experimental results show the feasibility of the proposed scheme.
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Acknowledgements
The authors acknowledge the support of the National Natural Science Foundation of China (Grant No. 61573185) and JiangSu Scientific Support Program of China (Grant No. BE2010190).
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Wu, X., Wang, C. & Hua, S. Adaptive Extended State Observer-Based Nonsingular Terminal Sliding Mode Control for the Aircraft Skin Inspection Robot. J Intell Robot Syst 98, 721–732 (2020). https://doi.org/10.1007/s10846-019-01067-1
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DOI: https://doi.org/10.1007/s10846-019-01067-1