Abstract
Background
Electromagnetic damper (EMD), which is regarded as an emerging type of damper, has drawn wide attention in vibration control fields. One of the main challenges of EMD is the design of controllers, many of which have adopted some unmeasured signals and have ignored the system's disturbance.
Purpose
To fill this research gap, a H∞ controller based on state estimation and disturbance compensation is designed, and an EMD seat suspension system is applied in this research.
Methods
A two-degree-of-freedom (DOF) seat suspension and the EMD system models are introduced and established first. Then, the Bouc-Wen model is selected to represent the system's disturbance, including seat suspension friction and the EMD system's inertia force. A test bench is built to measure the system's force-displacement data, and the parameters of the Bouc-Wen model can be determined by parameter identification methods. Secondly, a robust H∞ controller based on state estimation and disturbance compensation is proposed. A state observer is proposed to estimate unmeasurable state variables and is used in the design of the proposed H∞ controller. Finally, another test bench, which consists of a six-DOF vibration platform and an EMD seat suspension system, is built. Three typical excitations, sinusoidal, bump, and random excitations, are selected to simulate the real road excitation. A commercial suspension with good vibration isolation capacity is selected to compare with the EMD seat suspension.
Results
Experimental results demonstrate that the H∞ controller can improve vertical ride comfort and reduce suspension deflection effectively.
Conclusion
In addition, the designed controller can reduce vibration magnitude in all interested frequency ranges compared with the passive one.
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This research is funded by the National Natural Science Foundation of China (51675152) and the Anhui New Energy Automobile and Intelligent Networking Automotive Industry Technology Innovation Project (IMIZX2018001).
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Xu, X., Xia, X., Zheng, M. et al. Vibration Control of Electromagnetic Damper System Based on State Observer and Disturbance Compensation. J. Vib. Eng. Technol. 10, 3133–3146 (2022). https://doi.org/10.1007/s42417-022-00545-5
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DOI: https://doi.org/10.1007/s42417-022-00545-5