Synchronization Behavior of Secondary Vibration Isolation System with Two Co-Rotating Motors

doi:10.3901/JME.2022.17.170

Abstract

Abstract: To solve the harm caused by the excitation transmission in the vibrating system, the secondary vibration isolation system with two co-rotating motors is proposed. Firstly, the motion differential equations of the system are established by Lagrange equation. Subsequently, the analytical expressions of synchronization criterion and stability criterion are given by adopting the small parameter average method and Routh-Hurwitz criterion. Next, the influence of excitation frequency and structural parameters of the system on synchronous behavior is discussed by numeric analyses. Then, the electromechanical coupling model of the system is established to analyze the influence of electromechanical coupling characteristic on synchronous behavior through Runge-Kutta method of the fourth order. The research results indicate that, when the system operates in the low frequency region, the relative motion amplitude and synchronous phase difference of the system are fluctuated and the coupling moment is gradually increased with the increment of the excitation frequency; when the system operates in the high frequency region, the relative motion amplitude and synchronous phase difference of the system are independence of the excitation frequency, and the coupling moment is stabilized at maximum; besides, the synchronous phase difference of the system is decreased with the increment of mounting distance or with the decrement of installation angle. Finally, the experiment is designed to verify the accuracy of theoretical and simulation analyses.

Key words: synchronization, stability, vibration isolation, motor, phase difference

CLC Number:

TH113

HOU Yongjun, PENG Huan, FANG Pan, HOU Duyu, WANG Dejin. Synchronization Behavior of Secondary Vibration Isolation System with Two Co-Rotating Motors[J]. Journal of Mechanical Engineering, 2022, 58(17): 170-180.

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