Adaptive boundary control of an axially moving system with large acceleration/deceleration under the input saturation

Yukun Song; Yue Song; Yongjun Wu; Yukun Song; Yue Song; Yongjun Wu

doi:10.3934/mbe.2023810

Mathematical Biosciences and Engineering

2023, Volume 20, Issue 10: 18230-18247. doi: 10.3934/mbe.2023810

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Research article

Adaptive boundary control of an axially moving system with large acceleration/deceleration under the input saturation

College of Science, Liaoning University of Technology, Jinzhou 121001, China

Received: 18 July 2023 Revised: 26 August 2023 Accepted: 12 September 2023 Published: 21 September 2023

We present the dynamical equation model of the axially moving system, which is expressed through one partial differential equation (PDE) and two ordinary differential equations (ODEs) obtained using the extended Hamilton's principle. In the case of large acceleration/deceleration axially moving system with system parameters uncertainty and input saturation limitation, the combination of Lyapunov theory, S-curve acceleration and deceleration (Sc A/D) and adaptive control techniques adopts auxiliary systems to overcome the saturation limitations of the actuator, thus achieving the purpose of vibration suppression and improving the quality of vibration control. Sc A/D has better flexibility than that of constant speed to ensure the operator performance and diminish the force of impact by tempering the initial acceleration. The designed adaptive control law can avoid the control spillover effect and compensate the system parameters uncertainty. In practice, time-varying boundary interference and distributed disturbance exist in the system. The interference observer is used to track and eliminate the unknown disturbance of the system. The control strategy guarantees the stability of the closed-loop system and the uniform boundedness of all closed-loop states. The numerical simulation results test the effectiveness of the proposed control strategy.
- adaptive boundary control,
- actuator input saturation,
- axially moving system,
- interference observer,
- large acceleration/deceleration
Citation: Yukun Song, Yue Song, Yongjun Wu. Adaptive boundary control of an axially moving system with large acceleration/deceleration under the input saturation[J]. Mathematical Biosciences and Engineering, 2023, 20(10): 18230-18247. doi: 10.3934/mbe.2023810

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Abstract

We present the dynamical equation model of the axially moving system, which is expressed through one partial differential equation (PDE) and two ordinary differential equations (ODEs) obtained using the extended Hamilton's principle. In the case of large acceleration/deceleration axially moving system with system parameters uncertainty and input saturation limitation, the combination of Lyapunov theory, S-curve acceleration and deceleration (Sc A/D) and adaptive control techniques adopts auxiliary systems to overcome the saturation limitations of the actuator, thus achieving the purpose of vibration suppression and improving the quality of vibration control. Sc A/D has better flexibility than that of constant speed to ensure the operator performance and diminish the force of impact by tempering the initial acceleration. The designed adaptive control law can avoid the control spillover effect and compensate the system parameters uncertainty. In practice, time-varying boundary interference and distributed disturbance exist in the system. The interference observer is used to track and eliminate the unknown disturbance of the system. The control strategy guarantees the stability of the closed-loop system and the uniform boundedness of all closed-loop states. The numerical simulation results test the effectiveness of the proposed control strategy.

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