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Design and Analysis of a Novel Vehicle-Mounted Active QZS Vibration Isolator

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Iranian Journal of Science and Technology, Transactions of Mechanical Engineering Aims and scope Submit manuscript

Abstract

The quasi-zero stiffness (QZS) isolator has the characteristics of high-static and low-dynamic stiffness, and shows good vibration isolation performance. In this paper, a novel vehicle-mounted QZS vibration isolator is designed, which includes negative stiffness spring mechanism, cam-roller mechanism with actuator, initial static balance adjustment mechanism and initial locking mechanism. Through the adjustment of the initial stage, it can adapt to different loads. The conditions of realizing QZS of the isolator are derived, and the nonlinearity is shown in the frequency domain. Further, the output feedback H-infinity optimal control strategy based on constraints is applied to the designed vehicle-mounted QZS isolator. To test the performance of the isolator, numerical simulation is studied under the low-frequency large amplitude excitation and high-frequency small amplitude excitation in time domain. The results show that the designed QZS vibration isolator and its active controller have a good vibration isolation effect for large amplitude excitation from the road. Especially, under the excitation of small amplitude, very small active control force can significantly improve the vibration isolation effect.

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No funding was received to assist with the preparation of this manuscript.

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CW provided all the data of this paper and was the only contributor in writing this paper. The author read and approved the final manuscript.

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Correspondence to Chunyu Wei.

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The only author declares that he has no conflict of interest. This work has not been published before and its publication has been approved by the author.

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Wei, C. Design and Analysis of a Novel Vehicle-Mounted Active QZS Vibration Isolator. Iran J Sci Technol Trans Mech Eng 47, 2121–2131 (2023). https://doi.org/10.1007/s40997-023-00622-4

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  • DOI: https://doi.org/10.1007/s40997-023-00622-4

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