A six-degree-of-freedom ultra-low frequency vibration isolation device and its control system based on a zero-stiffness system

Abstract

The invention discloses a six-degree-of-freedom ultralow frequency vibration isolation device based on a zero stiffness system and a control system thereof, and relates to the fields of multi-degree-of-freedom low frequency, ultralow frequency and even zero-frequency vibration isolation and micro vibration simulation experiments. The six-degree-of-freedom ultralow frequency vibration isolation device based on the zero stiffness system is formed by connecting a supporting platform, a basic platform and a vibration isolation module. The vibration isolation module comprises an upper connecting rod, a lower connecting rod, a columnar shell, a vertical spring, a horizontal spring and a connecting assembly between the springs. The upper end of the upper connecting rod is connected with the supporting platform. The lower end of the upper connecting rod penetrates through an upper end cover of the columnar shell and is connected with the connecting assembly between the springs. The upper end of the lower connecting rod is fixedly connected with a lower end cover of the columnar shell. The lower end of the lower connecting rod is connected with the basic platform. The vibration isolation module meets the characteristic of zero stiffness. In combination with a gravity environment self-adapting control system, an isolated object is in a suspended state. Low frequency, ultralow frequency and even zero-frequency full-band vibration immune and isolation performance can be realized, and the problem of the multicoupling technique of multi-degree-of-freedom ultralow frequency, vibration resonance and non-linear dynamics is solved.

Description

technical field [0001] The invention provides a six-degree-of-freedom vibration isolation device and its control system based on a zero-stiffness system, which involves a series of high-resolution earth observations in spaceflight, space-borne precision optical instruments, stable aiming of weapons and equipment, and ultra-precision instrument processing. A series of multi-degree-of-freedom low-frequency, ultra-low frequency, and even low-to-zero frequency vibration isolation and micro-vibration simulation experiments. Background technique [0002] There are a large number of multi-dimensional vibration phenomena in actual engineering, such as micro-vibration of space spacecraft, stable aiming of weapons and equipment, transportation of vehicles, machining, earthquakes, etc. In most cases, multi-dimensional vibration has adverse effects on personnel or equipment, causing different damages. For example, the micro-vibration of the spacecraft will seriously affect the imaging ...

AI Technical Summary

Problems solved by technology

At present, there are many design schemes for single-degree-of-freedom zero-stiffness systems, but there are few studies on multi-degree-of-freedom, especially six-degree-of-freedom zero-stiffness systems

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