Semi-active type high-static and low-dynamic vibration isolator with magnetorheological elastomer

Abstract

The invention discloses a semi-active type high-static and low-dynamic vibration isolator with a magnetorheological elastomer. The semi-active type high-static and low-dynamic vibration isolator withthe magnetorheological elastomer comprises a base, a control system, a direct current adjustable power source and the magnetorheological elastomer. The base is of a cylinder-shaped steel structure, aweight sensor is mounted at the center position of the bottom of the base, a cylindrical iron core is arranged at the center position of the interior of the base, the magnetorheological elastomer is fixedly arranged in an annular groove of the iron core, and the iron core below the magnetorheological elastomer is wound with a coil. The two ends of the coil are connected with the current output endof the direct current adjustable power source through wires, and the control signal output end of the control system is connected with the signal input end of the direct current adjustable power source through wires. A buckling circular plate is mounted at the top of the magnetorheological elastomer, a platform is mounted at the top of the buckling circular plate, and the platform, the buckling circular plate and the magnetorheological elastomer are fixedly connected through bolts. The semi-active type high-static and low-dynamic vibration isolator with the magnetorheological elastomer has agood low-frequency vibration isolation effect and a simple and reliable structure, and can trace the changing of the loading weight, and the control method is simple.

Description

technical field [0001] The invention relates to the technical field of vibration isolators, in particular to a magnetorheological elastomer semi-active high static and low dynamic vibration isolator. Background technique [0002] Vibration can easily cause fatigue damage to equipment. Aerospace, ship and marine structures and their equipment and precision instruments are susceptible to interference and damage from extreme environments, and vibration isolation should be performed; the vibration excitation sources of these equipment are usually low-frequency or ultra-high frequency low frequency. The traditional linear passive vibration isolation technology is to design a suitable spring support at the natural frequency of the vibration system In the frequency range beyond 10 times, it can effectively isolate vibration, but the effect of isolating low frequency vibration is poor. In order to make the vibration isolation frequency range wider and the vibration isolation effe...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a magnetorheological elastomer semi-active high-static low-dynamic vibration isolator to solve the problem that it cannot actively adapt to the change of the load-bearing load proposed in the above-mentioned background technology, and the load-bearing object is single; if the load-bearing load changes , the vibration isolation system will deviate from the original quasi-zero stiffness working state, and the vibration isolation effect will become worse; in some practical applications (such as seats, etc.), the bearing load changes, and this vibration isolation system cannot Changes, automatically adjust the stiffness; and the structure is not compact enough, more complicated problems

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