A Multi-Dimensional Vibration Damping Platform Based on Parallel Mechanism

Abstract

The invention discloses a multi-dimensional vibration reduction platform based on a parallel mechanism. By setting certain structural parameters, the quasi-zero stiffness of the vibration isolation platform at its equilibrium position and the nonlinear stiffness near the equilibrium position can be realized, which can solve the problem of traditional linear isolation. It is difficult to isolate low-frequency or ultra-low-frequency vibration in the vibration system; the stiffness and damping can be easily adjusted, which is suitable for wide-frequency vibration isolation and has good engineering applicability; while having high support stiffness, it also has very low motion stiffness , the static deformation is small, the dynamic natural frequency is low, and the vibration isolation effect is good; through the flexible adjustment of stiffness and damping, it can solve the inherent contradiction that restricts the traditional vibration isolation system, that is, the contradiction between low-frequency vibration transmission rate and high-frequency vibration attenuation rate; through The adjustment of the height of the shock absorber spring base can change the height and static balance position of the entire platform, and can adapt to vibration-isolation objects of different weights.

Description

technical field [0001] The invention belongs to the technical field of mechanical engineering, relates to vibration reduction and vibration isolation technology in mechanical engineering, and in particular to a multi-dimensional vibration reduction platform based on a parallel mechanism. Background technique [0002] In order to overcome the contradiction between system stiffness and static displacement, the vibration isolation system should have high static stiffness and low dynamic stiffness at the same time. Higher static stiffness ensures greater bearing capacity of the system and smaller static displacement; lower dynamic stiffness ensures lower natural frequency of the system and better low-frequency vibration isolation effect. In traditional passive vibration isolation systems, the external excitation frequency is greater than the natural frequency of the vibration isolation system itself. times, in order to play a role in vibration isolation. This vibration isolat...

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Problems solved by technology

But for the vertical vibration isolation system, reducing the stiffness will increase the static displacement and decrease the stability of the vibration isolation system; and increasing the counterweight is obviously the last choice, and it is only used as a last resort, and the application is limited

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