A Magnetically Suspended Quasi-Zero-Stiffness Electromagnetic Isolator with Active Negative Stiffness

Abstract

The invention is a magnetic levitation quasi-zero stiffness electromagnetic vibration isolator with active negative stiffness. The invention relates to the technical field of vibration control. The invention can select and realize passive negative stiffness and active negative stiffness by adjusting the control mode of a controller. By adopting the amplification mechanism and the DIESOLE electromagnet, the bearing capacity of the vibration isolator is further increased, and it is suitable for the ultra-low frequency heavy-duty vibration reduction and isolation field. According to the sensor, the displacement state of the negative stiffness mechanism can be measured in real time. With the cooperation of the controller and the driver, the active negative stiffness can be realized, and the real-time linear negative stiffness can be realized, which avoids the multi-stable phenomenon and prevents the vibration isolator from jumping during the working process. and other complex dynamic phenomena. The active negative stiffness is realized, and the current passing through the system can be adjusted according to different working conditions. The system has a strong self-adaptive ability, and can be applied to vibration-isolated objects of different masses and adapt to different working environments.

Description

technical field [0001] The invention relates to the technical field of vibration control, and relates to a magnetic suspension quasi-zero stiffness electromagnetic vibration isolator with primary and negative stiffness. Background technique [0002] As an important technical means of vibration reduction and noise reduction, vibration isolation technology aims to take certain measures between the vibration source and the system, and install appropriate vibration suppression or vibration isolation equipment to isolate the direct transmission of vibration. Traditional passive vibration isolators can theoretically only be used for excitation frequencies greater than The vibration of times the natural frequency of the system plays an attenuating role, and after the system is designed and finalized, its stiffness and damping are fixed, and its adaptive ability is poor. Therefore, in the field of low-frequency vibration isolation, quasi-zero stiffness vibration isolation technolog...

AI Technical Summary

Problems solved by technology

In recent years, in many mechanisms that realize negative stiffness, the maximum negative stiffness and working range that the mechanism can achieve represent the static load capacity and adaptability of the quasi-zero stiffness vibration isolator, respectively. In the existing mechanisms, the negative stiffness mechanism Most of the implementation methods are passive and semi-active. Due to the limitation of their implementation methods, these two parameters often cause conflicts.

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