A six-degree-of-freedom quasi-zero-stiffness vibration isolation system based on a stewart platform

Abstract

A six-degree-of-freedom quasi-zero-stiffness vibration isolation system based on a Stewart platform, including an upper platform and a lower platform, and six identical legs fixed between the upper platform and the lower platform through hinge blocks; the hinge blocks are three and It is distributed in the form of an equilateral triangle. Two outriggers are fixed on each hinge block. The adjacent outriggers are perpendicular to each other. The upper platform has six degrees of freedom relative to the lower platform; the six outriggers have quasi-zero stiffness characteristics , so the vibration isolation system has the characteristics of quasi-zero stiffness in the six degrees of freedom, so the resonance frequency of each order of the vibration isolation system is very small, and has a wide range of vibration isolation frequencies; the present invention has high bearing capacity and low resonance frequency It has a good suppression effect on low-frequency vibration, and is suitable for vibration isolation of flywheel systems, optical cameras in the aerospace field, and precision machine tools, precision measurement systems and other equipment in the civil field.

Description

technical field [0001] The invention belongs to the technical field of passive vibration isolation, in particular to a six-degree-of-freedom quasi-zero-stiffness vibration isolation system based on a Stewart platform. Background technique [0002] With the advancement of aerospace technology, aerospace equipment is gradually developing in the direction of precision. Low-frequency vibration and micro-vibration in spacecraft will not only cause damage to precision instruments and equipment, but also affect the use of instruments and equipment (such as optical cameras). For precision equipment such as precision machine tools and precision measurement systems, low-frequency vibrations from the surrounding environment such as seismic waves will seriously affect the accuracy of the equipment. Micro-vibration and low-frequency vibration have become the focus and difficulty in the field of vibration control. Vibration isolation is an important means of vibration control. Researche...

AI Technical Summary

Problems solved by technology

However, there are few studies on applying the principle of quasi-zero stiffness to multi-degree-of-freedom vibration isolation.

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