Magnetic suspension type quasi-zero stiffness electromagnetic vibration isolator with active negative stiffness

Abstract

The invention relates to a magnetic suspension type quasi-zero stiffness electromagnetic vibration isolator with active negative stiffness. The invention relates to the technical field of vibration control, and a passive negative stiffness and an active negative stiffness can be selectively realized by adjusting the control mode of a controller. By the adoption of an amplifying mechanism and a DIESOLE type electromagnet, the bearing capacity of the vibration isolator is further improved, and the vibration isolator is suitable for the field of ultra-low-frequency heavy-load vibration reduction and isolation. According to the vibration isolator, the displacement state of the negative stiffness mechanism can be measured in real time according to a sensor, the active negative stiffness and the real-time linear negative stiffness are achieved under the cooperation of the controller and a driver, the multistable phenomenon is avoided, and the vibration isolator is prevented from jumping and other complex dynamic phenomena in the working process. The active negative stiffness is achieved, the current passing through the system can be adjusted according to different working conditions, and the system is high in self-adaptive capacity, can be suitable for objects different in mass and subjected to vibration isolation and can 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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