Multifunctional compound vibration isolator

Abstract

The invention provides a multifunctional compound vibration isolator with both stiffness and damping being adjustable, and the multifunctional compound vibration isolator combines a high static stiffness and low dynamic stiffness vibration isolation technology and a variable damping technology. The structure of the multifunctional compound vibration isolator is mainly formed by an electromagneticvibration isolator with the high static stiffness and low dynamic stiffness feature and a magneto-rheological damper through parallel connection. The electromagnetic vibration isolator and the magneto-rheological damper are independently electrified, the multiple functions are achieved, and meanwhile the problem that the vibration damping performance deteriorates due to a jumping phenomenon when an existing negative stiffness technology is applied can be well solved. The electromagnetic vibration isolator adopts a magnetic tooth structure, by changing the input exciting current, online adjustment of electromagnetism stiffness can be achieved, and therefore the inherent frequency of the vibration isolation system is lowered. The variable damping technology adopts the magneto-rheological damper, and the damper of this type achieves damping change also through change of the input current. When the multifunctional compound vibration isolator works, the mode that the electromagnetic vibration isolator works alone, or the mode that the magneto-rheological damper works alone, or the mode that the electromagnetic vibration isolator and the magneto-rheological damper simultaneously work canbe selected.

Description

technical field [0001] The invention relates to the technical field of vibration reduction and isolation, in particular to a multifunctional composite vibration isolator with variable damping and variable stiffness. Background technique [0002] Vibration isolation is an important means to solve vibration control problems in engineering. Although traditional passive vibration isolation devices are simple in structure, cost-effective, and high in reliability, they have some shortcomings such as fixed parameters such as damping and stiffness, which cannot be changed with changes in system excitation. Therefore, in order to adapt to changes in system excitation, semi-active vibration isolation devices based on adjustable stiffness or damping have gradually attracted the attention of researchers. In general, in order to improve the low-frequency vibration isolation effect of the vibration isolation system, it is necessary to reduce the stiffness of the vibration isolation syste...

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Problems solved by technology

However, this type of vibration isolator is only limited to damping adjustment, and cannot adjust the stiffness, which is insufficient in solving the problem of variable working conditions related to stiffness.

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