复合式空气悬架多模式切换终端滑模控制

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Abstract Aiming at the problem of difficult coordination between body height and suspension damping under complex operating conditions of vehicle air suspension system, a multi-mode switching terminal sliding mode control strategy for composite air suspension was proposed. Considering the effects of suspension system nonlinearity and external disturbances, a nonlinear dynamics model of composite air suspension was established. A multi-mode switching controller was designed to determine the optimal damping control mode under different body heights. An unknown input observer was used to estimate the suspension system state quantity, and a non-singular fast terminal sliding mode controller based on radial basis neural network was designed to control the linear motor output under the corresponding mode of electromagnetic. Finally, the dynamic performance of the suspension under the multi-mode switching terminal sliding mode control strategy was simulated and tested on the bench. The simulation results show that the control strategy can effectively coordinate the body height and suspension damping, and improve the smoothness and stability of the vehicle under complex working conditions. The test results show that compared with the passive suspension, the acceleration of the reed mass of the system is reduced by 32.5% and 33.7% in the time domain and frequency domain respectively, which verifies the effectiveness of the control strategy.

Key words： composite air suspension multi-mode switching unknown input observer radial basis neural network non-singular fast terminal sliding mode control

Received: 20 June 2023 Published: 15 June 2024

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	Articles by authors
	KOU Farong1
	YANG Xudong2
	LI Shenglin2

Cite this article:

KOU Farong1,YANG Xudong2,LI Shenglin2. Terminal sliding mode control for multi-mode switching of composite air suspension[J]. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(11): 83-93.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2024/V43/I11/83

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