Novel intelligent vibration isolation noise reduction composite structure system and usage method thereof

Abstract

The invention provides a novel intelligent vibration isolation noise reduction composite structure system and a usage method thereof. The system comprises: a feedback piezoelectricity sensing element, an upper insulation transition layer, an upper flexible electrode, an actuator unit, a lower flexible electrode, a lower insulation transition layer and a piezoelectric sensing element. The feedback piezoelectricity sensing element, the actuator unit and the piezoelectric sensing element are connected with a controller through a line. When one sensor perceives external vibration, the controller adds a control voltage to the electrode coated on electroactive polymer surface according to different controlled objects and a control algorithm so that the actuator performs inverse deformation to control vibration transmission. And the other feedback piezoelectricity sensing element is taken as a feedback element which plays a supervision role. A small block which uses the structure is made to firmly stick on a submarine surface. Because of the inverse deformation, the control actuator can control sound radiation of a submarine. By using the system and the method of the invention, vibration isolation and noise abatement in high, middle and low frequency system can be completed. The system and the method can be widely used in the submarine, aerospace, precise instrument equipment vibration isolation field.

Description

technical field [0001] The invention relates to a vibration isolation and noise reduction system, in particular to a novel intelligent vibration isolation and noise reduction composite structure system widely used in fields such as submarines, aerospace, and micro-nano instrument equipment vibration isolation and a method for using the same. Background technique [0002] Traditional active and passive vibration isolation and noise reduction devices mainly achieve the purpose of controlling vibration by adjusting the damping of the structure, coordinating the relationship between springs, damping and mass, and increasing the consumption of vibration energy. The passively controlled added damping structure is divided into free damping structure, constrained damping structure and embedded damping structure. There are two traditional vibration control methods: one is to use a vibration isolator to separate the vibrating equipment from the foundation to prevent the vibration of t...

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Problems solved by technology

However, due to the defects of low piezoelectric constant, small strain, and high density of traditional electrically stretchable materials, it is impossible to achieve precise control of mechanical structure vibration

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