Research On Design And Control Of Stiffness Adaptive Damper Based On Move Support

In recent years,with the development of high precision technology,such as processing,testing and instrumentation,the ability of isolating vibration of equipment has become increasingly demanding.Based on the principle of semi-active vibration isolation with variable stiffness,a vibration reduction platform with leaf spring as variable stiffness element is designed.Combined with the hardware design,LabVIEW is selected to design the software needed for the vibration isolation platform experiment.Finally,the vibration isolation performance of the vibration isolation platform is verified by the experiment.The main contents of this paper are as follows:(1)According to the positive vibration isolation principle of single-degree-of-freedom platform,the dynamic simulation of the platform with variable stiffness is carried out,and the force transfer ratio is used as the evaluation of vibration isolation.The force transfer ratio curves of multi-platform frequency under different excitation frequencies are obtained and the control strategy of vibration isolation is designed.(2)Structural design and related hardware selection of the vibration isolation platform are carried out.In the structural design,based on the principle of changing clamping position by move support,i.e.changing the effective working length of leaf spring to adjust stiffness,and combined with the hardware needed in the experiment,the mechanism of each part of the platform is designed.(3)Based on the selected hardware,the software design of data acquisition,vibration control and other functions of the vibration isolation platform in the experiment is carried out by LabVIEW.Based on the overall framework of the producer-consumer cycle,the functional modules are integrated and finally combined into a software system for vibration control of the vibration reduction platform.(4)Relevant experiments are carried out on the vibration isolation platform.Firstly,the dynamic model parameters of the platform are tested,and the relationship between the effective working length of the leaf spring and the frequency of the platform is obtained.Then,the actual force transfer ratio curves are obtained through experiments and the control strategy of vibration isolation is adjusted accordingly.Finally,the vibration control software is tested.The experimental results show that it can effectively adjust the effective working length of leaf spring according to the excitation frequency,so as to realize semi-active variable stiffness control.