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Vibration reduction of seat suspension using observer based terminal sliding mode control with acceleration data fusion

journal contribution
posted on 2024-11-16, 04:36 authored by Donghong Ning, Shuaishuai SunShuaishuai Sun, Lidui Wei, Bangji Zhang, Haiping DuHaiping Du, Weihua LiWeihua Li
In this work, a disturbance observer and state observer based terminal sliding mode (TSM) controller with acceleration data fusion is proposed for the active control of a seat suspension. In practical applications, the driver's body and the friction forces are difficult to be accurately described with a mathematical model; for this reason, the proposed controller is designed based on a model simplified from a 6-degree-of-freedom (6-DOF) seat-driver model with nonlinear friction. The disturbance observer and state observer are designed together with Linear Matrix Inequality (LMI) method. For improving the observer's performance, a complementary filter is applied to fuse the estimation of the seat suspension velocity from the acceleration measurement and the state observer. The proposed controller is validated using simulations with various bump excitations applied, and the conventional state feedback TSM controller is implemented for comparison. The proposed controller is also implemented in a practical active seat suspension prototype, and a well-tuned commercial heavy duty vehicle seat suspension is applied for comparison. The power spectral density (PSD) value and ISO 2631¿1 standard are used to evaluate the active seat suspension system's performance under random vibration. Both the simulation and the experimental results indicate that with the proposed controller, the vibration magnitude caused by a rough road can be greatly reduced, and the driver ride comfort is greatly improved.

Funding

Comfort and ergonomics: Innovative seating solutions for commercial vehicles

Australian Research Council

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History

Citation

D. Ning, S. Sun, L. Wei, B. Zhang, H. Du & W. Li, "Vibration reduction of seat suspension using observer based terminal sliding mode control with acceleration data fusion," Mechatronics, vol. 44, pp. 71-83, 2017.

Journal title

Mechatronics

Volume

44

Pagination

71-83

Language

English

RIS ID

114170

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