Semi-active Vibration Isolation Actuator Based on Permanent Magnetic Electromagnetic Composite

Abstract

The invention aims at providing a permanent electromagnetic compounding semi-active vibration isolation actuator. A permanent magnet is arranged between a first shell and a second shell. A hollow shell structure is jointly formed by the first shell, the permanent magnet and the second shell. A spindle is mounted in an armature, the armature is mounted in the shell structure, and the first end of the armature stretches out of the second shell. A flange and the end of the second shell are fixed. A first bearing end cover is fixed to the end of the first shell. A second bearing end cover is fixed to the end of the flange. The first bearing end cover and the second bearing end cover are arranged outside the two ends of the spindle correspondingly. The outer sides of the two ends of the spindle are each provided with a nut. Springs are mounted between one nut and the first bearing end cover and between the other nut and the second bearing end cover correspondingly. The permanent electromagnetic compounding semi-active vibration isolation actuator combines the functions of a passive vibration isolator and a controllable rigidity actuator in a traditional semi-active vibration isolation system, and meanwhile the problem that the passive vibration isolator in the traditional semi-active vibration isolation system is instable is solved.

Description

technical field [0001] The invention relates to a vibration control device, specifically a vibration isolator. Background technique [0002] Mechanical vibration is almost ubiquitous in people's daily life, and its hazards are well known. Vibration isolation (referred to as vibration isolation) technology is one of the most widely used technologies in the field of vibration control. It refers to the use of additional subsystems to separate the vibration source from the object to be reduced, so as to reduce the impact of the vibration source on the vibration isolation object. . Semi-active vibration isolation is a parameter control technology of a vibration isolation system. It adjusts the stiffness or damping of certain links in the vibration isolation system in real time according to changes in system input and requirements for system output, so that the system can obtain excellent dynamics. academic characteristics. Compared with the passive vibration isolation system, ...

AI Technical Summary

Problems solved by technology

Electromagnetic actuators can only increase, not reduce, the stiffness of the system. The increase in stiffness can only be changed with the change of current, so the natural frequency of the system cannot be too small, which leads to the isolation of low-frequency vibrations limited to increasing the system Stiffness, so that the resonance peak moves to the high frequency band, thereby avoiding the resonance peak, but its force transmission rate is still relatively large, which affects the vibration isolation effect

Moreover, there are both passive vibration isolators and controllable stiffness actuators in the system, resulting in many components and complex structures

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