Self-feedback tri-stable micro-vibration isolation device with variable stiffness based on pvc Gel

Abstract

The invention discloses a self-feedback three-stable state variable stiffness micro-vibration isolation device based on PVC Gel. The self-feedback three-stable state variable stiffness micro-vibrationisolation device comprises a machine frame, a compliant mechanism and a vibration isolation mechanism. The vibration isolation mechanism is arranged at the machine frame in a circumference arraying mode. The compliant mechanism is connected with the vibration isolation mechanism. The machine frame comprises a connecting block, a connecting ring and an installation supporting bracket. The compliant mechanism comprises a supporting beam, a main beam and a center block. The vibration mechanism comprises an adjusting shaft and a PVC Gel unit arranged at the adjusting shaft and used for absorbingtiny energy. The PVC Gel unit comprises a negative plate, a polyvinyl chloride gel film, a mesh layer and a positive element. The steady-state characteristics of the compliant mechanism are changed bysmall displacement, and therefore stiffness can be significantly regulated. Better performance of active control can be achieved with small energy loss, and better vibration isolation performance isachieved. Structure is simple, weight is low, energy consumption is little and reliability is high.

Description

technical field [0001] The invention relates to a technology in the field of micro-vibration control, in particular to a self-feedback tri-stable variable-stiffness micro-vibration isolation device based on PVC Gel (polyvinyl chloride gel). Background technique [0002] With the development of science and technology, high-sensitivity devices have higher and higher requirements for vibration isolation. For example, high-precision cameras on observation satellites have high requirements for the stability of satellites during normal operation. Generally, the vibration is required to be less than 1x10 -4 g level, which poses a huge challenge to micro-vibration control. Generally, vibration control includes passive control, semi-active control and active control. The passive vibration isolation platform is mainly composed of high-performance dampers with stable performance and high reliability. However, the vibration isolation performance of traditional passive vibration isolat...

AI Technical Summary

Problems solved by technology

However, the vibration isolation performance of traditional passive vibration isolators in the low frequency range (below 100Hz) is not ideal; active control technology can effectively suppress low-frequency micro-vibration disturbances, but most of the current active control devices have complex structures, large masses, and high energy consumption , low reliability

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