Quasi-zero stiffness vibration isolator based on magnetorheological elastomer

Abstract

The invention discloses a quasi-zero stiffness vibration isolator based on a magnetorheological elastomer. The vibration isolator is composed of a magnetorheological elastomer assembly, a belleville spring, a current source, an acceleration sensor, a controller and a vibration isolator base; the magnetorheological elastomer assembly is composed of magnet exciting coils, the magnetorheological elastomer, a magnetorheological elastomer base, cylindrical magnet exciting carriers and an outer cylinder body, the left end of the assembly is connected with a vibration-isolated mechanism through flexible plates, and the right end of the assembly is connected with a third fixing table through a fixing bolt to provide horizontal force; and the upper end of the belleville spring is connected with thevibration-isolated mechanism in the vertical direction through a connecting bolt, and the lower end of the belleville spring is connected with the vibration isolator base through a belleville springsupporting table to provide vertical supporting force. According to the vibration isolator, the high static stiffness and low dynamic stiffness near the balance position of the vibration-isolated mechanism can be achieved, the response speed is high, and the change range is wide.

Description

technical field [0001] The invention relates to a quasi-zero-stiffness vibration isolator with dynamic negative stiffness adjustment, in particular to a quasi-zero-stiffness vibration isolator based on a magneto-rheological elastic body. Background technique [0002] Vibration is ubiquitous in various fields of engineering applications, but under the working conditions of most precision instruments, vibration is a harmful condition to be avoided. Excessive vibration, for example, can impair equipment functionality and accelerate the rate at which an instrument ages, resulting in a reduction in its useful cycle life. With the continuous development of vibration isolation technology, the current high frequency vibration isolation problem has been better solved, but under the classic linear vibration isolation theory, the classic vibration isolation system such as double-layer vibration isolator when the vibration frequency is When it is equal to or less than the resonance fre...

AI Technical Summary

Problems solved by technology

However, in many quasi-zero stiffness vibration isolation mechanisms, the stiffness cannot be adjusted, or the adjustment response speed is too slow, and the adjustment range is too small, so that the desired vibration isolation effect cannot be achieved.

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