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Load adaptive sliding mode control of electromagnetic quasi-zero-stiffness isolators
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Yuanhui MA, Peng LING, Jiefeng ZHAO, Hongye MA, Bo YAN
Journal of Vibration Engineering | 2025, 38(9) : 2044 - 2051
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Journal of Vibration Engineering | 2025, 38(9): 2044-2051
Load adaptive sliding mode control of electromagnetic quasi-zero-stiffness isolators
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Yuanhui MA, Peng LING, Jiefeng ZHAO, Hongye MA, Bo YAN
Affiliations
  • School of Mechanical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
Published: 2025-09-10 doi: 10.16385/j.cnki.issn.1004-4523.202310068
Outline
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Quasi-zero-stiffness (QZS) isolators have excellent vibration isolation performance in the low-frequency range. However, in complex excitation environments, such as load mismatch condition, vibration isolation performance and corresponding stability deteriorate. To improve the vibration isolation performance of electromagnetic zero-stiffness isolators (E-QZS) and reduce the sensitivity to load, a load adaptive sliding mode control method of E-QZS is proposed. The theoretical model of an electromagnetic zero-stiffness isolator is established and a sliding mode control is designed. The range of gain coefficients for stable operation is determined using Lyapunov’s theorem. Additionally, we have devised a load-adaptive control law and conducted a corresponding stability analysis. Through simulation and experimental research, the results demonstrate that setting appropriate gains can enhance vibration isolation performance by 90%. Furthermore, the introduction of a load-adaptive sliding mode controller effectively reduces the impact of sudden load changes on isolation performance, thereby improving the robustness of the isolation system.

nonlinear vibration isolation  /  quasi-zero-stiffness  /  adaptive sliding mode control  /  active control
Yuanhui MA, Peng LING, Jiefeng ZHAO, Hongye MA, Bo YAN. Load adaptive sliding mode control of electromagnetic quasi-zero-stiffness isolators[J]. Journal of Vibration Engineering, 2025 , 38 (9) : 2044 -2051 . DOI: 10.16385/j.cnki.issn.1004-4523.202310068
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Article Info
doi: 10.16385/j.cnki.issn.1004-4523.202310068
  • Receive Date：2023-10-31
  • Online Date：2026-02-09
  • Published：2025-09-10
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  • Received：2023-10-31
  • Revised：2023-12-11
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    School of Mechanical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
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