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Six-degree-of-freedom ultralow frequency vibration isolation device based on zero stiffness system and control system thereof

A zero-stiffness, degree-of-freedom technology, applied in the field of six-degree-of-freedom vibration isolation devices and their control systems, can solve problems such as few studies, and achieve the effect of low cost and simple structure

Active Publication Date: 2018-07-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Six-degree-of-freedom ultralow frequency vibration isolation device based on zero stiffness system and control system thereof
  • Six-degree-of-freedom ultralow frequency vibration isolation device based on zero stiffness system and control system thereof
  • Six-degree-of-freedom ultralow frequency vibration isolation device based on zero stiffness system and control system thereof

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specific Embodiment approach 1

[0059] Specific implementation manner one: such as figure 1 , figure 2 with Figure 7 As shown, the scheme of the present invention will be described in detail with reference to the accompanying drawings:

[0060] A type of six-degree-of-freedom ultra-low frequency vibration isolation device based on a zero-stiffness system. The zero-stiffness system refers to a system that does not have the ability to resist elastic deformation and has continuous balance, constant potential energy, and neutral stability. Its dynamic equation can be expressed for

[0061]

[0062] Where X is the displacement vector of the system, and ε is the acceleration vector; the zero-stiffness system has the characteristic of zero natural frequency, which can achieve low-frequency, ultra-low frequency, and even low-to-zero frequency vibration immunity and vibration isolation performance;

[0063] The configuration of the six-degree-of-freedom ultra-low frequency vibration isolation device (six-degree-of-freedo...

specific Embodiment approach 2

[0097] Specific implementation manner two: such as figure 1 with image 3 As shown, other specific implementation schemes of a single vibration isolation module are given:

[0098] The connecting assembly between the springs includes two rollers 1, two guide rails 3, and an intermediate wheel 4, and the horizontal spring includes two horizontal compression springs 2;

[0099] Two guide rails 3 are respectively fixed on the middle of the inner wall of the cylindrical shell 10, and the two are symmetrically distributed. Each roller 1 is placed in the corresponding guide 3, and each roller 1 is arranged between each roller 1 and the inner wall of the corresponding cylindrical shell 10. There is a horizontal compression spring 2, the middle wheel 4 is located between the two rollers 1, the upper part of the middle wheel 4 is fixedly connected to the lower end of the upper link 11, the lower part of the middle wheel 4 is fixedly connected to the upper end of the vertical spring 5. 4 Un...

specific Embodiment approach 3

[0106] Specific implementation manner three: such as figure 1 with Figure 4 As shown, other specific implementation schemes of a single vibration isolation module are given:

[0107] The connecting assembly between the springs includes two sliders 1, two guide rails 3, and two connecting rods 4, and the horizontal spring includes two horizontal compression springs 2;

[0108] Two guide rails 3 are respectively fixed on the middle of the inner wall of the cylindrical shell 10, and they are symmetrically distributed. Each slider 1 is placed in the corresponding guide rail 3, and each slider 1 and the inner wall of the corresponding cylindrical shell 10 There is a horizontal compression spring 2 in between. One end of each connecting rod 4 is hinged with the center of the corresponding slider 1, and the other end of the two connecting rods 4 is hinged, and the two connecting rods 4 are located between the two sliders 1.

[0109] The hinged parts of the two connecting rods 4 are connec...

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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 present invention provides a six-degree-of-freedom vibration isolation device based on a zero-stiffness system and a control system thereof, which relates to aerospace high-resolution earth observation, spaceborne precision optical instruments, stable aiming of weapon equipment, ultra-precision instrument processing, etc. 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 practical engineering, such as spacecraft micro-vibration, stable aiming of weapons and equipment, transportation of vehicles, machining, earthquakes, etc. In most cases, multi-dimensional vibration has a negative impact on personnel or equipment, causing different damages. For example, the micro-vibration of the spacecraft will seriously affect the imaging quality of the opt...

Claims

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Application Information

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IPC IPC(8): F16F15/04
Inventor 曹庆杰杨涛朱光楠张潇汉梁廷伟王金龙江高腾
Owner HARBIN INST OF TECH
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