Wide-frequency vibration isolation device and vibration isolation control method

Abstract

The invention discloses a wide-frequency vibration isolation device. The device comprises a magneto-rheological damper, a piezoelectric element and a controller, wherein the magneto-rheological damperis used for generating damping force so as to carry out semi-active vibration isolation when equipment connected with the vibration isolation device is in a low-frequency large-amplitude vibration area, the piezoelectric element is connected with the magneto-rheological damper, is used for generating driving force so as to carry out active vibration isolation when the equipment connected with thevibration isolation device is in a high-frequency small-amplitude vibration area and meanwhile is used for detecting vibration signals of the equipment connected with the vibration isolation device,and the controller is used for receiving the vibration signals detected by the piezoelectric element, and is used for controlling the magneto-rheological damper to generate semi-active vibration isolation damping force or controlling the piezoelectric element to generate an active vibration isolation driving force according to the vibration signals. According to the wide-frequency vibration isolation device, a semi-active or active vibration isolation mode can be selected according to the current state of the equipment carried out vibration isolation, the overall vibration isolation effect andcontrol precision are effectively improved, control complexity is reduced, and the requirement of high-precision equipment vibration isolation is met.

Description

Technical field [0001] The invention relates to equipment vibration isolation technology, in particular to a broadband vibration isolation device and a vibration isolation control method. Background technique [0002] Structural vibration control is one of the current high-tech fields of structural engineering. According to whether external energy is needed, structural control can be divided into four categories: passive control, active control, semi-active control and hybrid control; passive control is also called passive control, which is not External input energy is required, while the process of active control relies on external excitation and structural response information, and external input energy is required to provide control force. Semi-active control also uses structural response or external excitation information, but only a small amount of energy is required to change The form of the control system achieves the purpose of changing the dynamic characteristics of the ...

AI Technical Summary

Problems solved by technology

[0003] With the continuous development of current science and technology, various precision equipment and high-tech products emerge in an endless stream. Precision equipment and some weapons and equipment are subject to complex excitations. The frequency band of these excitations is wide, and traditional passive vibration isolation devices are difficult to meet the requirements. The effect obtained is also relatively limited. Although the effect of active control is better, the structure is complex and the energy consumption is relatively large.

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