Active low-frequency vertical vibration isolation system for precision measurements

Isolation system of the heat water pumps can be simplified as a double sources exciting and double output double-deck vibration isolation system model, expressions of transmitted power flow and vibration speed to the basement are deduced based on the double sources exciting and double output double-deck vibration isolation system electric-force(E-F) analog picture, the curves of power flow and vibration speed transmitted to basement how the upper deck vibration isolation and intermediate mass effect are drawn by using mat lab program. The results show that the adjusting the upper deck vibration isolation stiffness parameters has little effect on the amplitude of vibration power flow, increasing intermediate mass can move first peak to the low frequency, increasing intermediate mass can obviously reduce t transmitted power flow and transmitted vibration speed amplitude to the basement.

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The active dynamic vibration damper in non-stationary operation of a vibroactive unit

Omsk Scientific Bulletin ◽

10.25206/1813-8225-2021-178-13-17 ◽

2021 ◽

pp. 13-17

Author(s):

D. V. Sitnikov ◽

◽

A. A. Burian ◽

Keyword(s):

Vibration Isolation ◽

Low Frequency ◽

Resonance Region ◽

Frequency Region ◽

Vibration Damper ◽

Passive System ◽

Isolation System ◽

Vibration Isolation System ◽

Dynamic Vibration ◽

Impulse Characteristics

The paper considers a vibration isolation system, in which a force is applied to the moving mass of the active dynamic vibration damper by an actuator in proportion to the measured value of the base response. The amplitude-frequency and impulse characteristics are plotted depending on the parameters of the system, assuming the actuator without distortion generates the force proportional to the base response. It is shown that the considered vibration isolation system is quite effective in the low-frequency region, including in the resonance region of the passive system, both in stationary and nonstationary modes of vibroactive forces

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Research on Vibration Isolation System Based on Disturbance Observer PID Control Algorithm

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.865.480 ◽

2017 ◽

Vol 865 ◽

pp. 480-485

Author(s):

Jian Liang Li ◽

Xiao Xi Liu ◽

Shu Qing Li ◽

Zhi Fei Tao ◽

Lei Ma

Keyword(s):

Pid Control ◽

Disturbance Observer ◽

Control Algorithm ◽

Vibration Isolation ◽

Low Frequency ◽

Isolation System ◽

Vibration Isolation System ◽

Virtual Test ◽

Set Up ◽

And Control

The research mainly focuses on the performance of the controllable hypocenter in the low frequency band. The hybrid vibration isolation method based on the disturbance observer PID control algorithm is used to improve the excitation signal quality. Based on the analysis of the structure and working principle of vibration isolator, the physical model and mathematical model are established, and the simulation test of ZK-5VIC virtual test vibration and control system is carried out. The experimental platform of hybrid vibration isolation system with low frequency interference is set up. The experiment of excitation and acquisition of low frequency signal is carried out, which provides the theoretical basis and guarantee for the vibration isolation technology in the low frequency range below 3Hz.

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Low-frequency active vibration isolation system

10.1117/12.188876 ◽

1994 ◽

Cited By ~ 4

Author(s):

Robin T. Stebbins ◽

David Newell ◽

Sam N. Richman ◽

Peter L. Bender ◽

James E. Faller ◽

...

Keyword(s):

Vibration Isolation ◽

Low Frequency ◽

Isolation System ◽

Vibration Isolation System ◽

Active Vibration ◽

Active Vibration Isolation

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Recent Advances in Quasi-Zero-Stiffness Vibration Isolation Systems

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.397-400.295 ◽

2013 ◽

Vol 397-400 ◽

pp. 295-303 ◽

Cited By ~ 9

Author(s):

Fu Niu ◽

Ling Shuai Meng ◽

Wen Juan Wu ◽

Jing Gong Sun ◽

Wei Hua Su ◽

...

Keyword(s):

Vibration Isolation ◽

Low Frequency ◽

Future Research ◽

Isolation System ◽

Vibration Isolation System ◽

Significant Development ◽

Recent Advances ◽

Low Frequency Vibration ◽

Future Research Directions ◽

Isolation Systems

The quasi-zero-stiffness vibration isolation system has witnessed significant development due to the pressing demands for low frequency and ultra-low frequency vibration isolation. In this study, the isolation theory and the characteristic of the quasi-zero-stiffness vibration isolation system are illustrated. Based on its implementation mechanics, a comprehensive assessment of recent advances of the quasi-zero-stiffness vibration isolation system is presented. The future research directions are finally prospected.

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Dynamic Analysis of Nonlinear Vibration Isolation System Based on Flexible Foundation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1030-1032.766 ◽

2014 ◽

Vol 1030-1032 ◽

pp. 766-769

Author(s):

Shu Ying Li ◽

Rui Huo ◽

Xing Ke Cui ◽

Cui Ping Liu ◽

Dao Kun Zhang

Keyword(s):

Nonlinear Vibration ◽

Power Flow ◽

Vibration Isolation ◽

Low Frequency ◽

Coupled System ◽

Optimized Design ◽

Isolation System ◽

Vibration Isolation System ◽

Vibration Isolators ◽

Flexible Foundation

In this paper,a general dynamic model of the isolation coupled system which is composed of isolation object,nonlinear vibration isolation support,and flexible foundation is established,calculated method of applying vibration power flow to analyze isolation effectiveness is studied.Further more,as an calculation example,a air spring vibration isolation system of HS-700 engines is numerically simulated.Designs several low-frequency nonlinear vibration isolators and analyzes its vibration isolation effect.It discusses the effect of the vibration isolator parameters on the transmitted power flow of the system.The results provide a theoretical basis for the optimized design of nonlinear vibration isolation system.

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