摘要
为探究磁流变弹性体隔振器应用于变刚度半主动隔振的可行性,制备硅橡胶基磁流变弹性体(MRE),设计制作MRE隔振器,对MRE材料和隔振器的性能进行测试,搭建基于MRE隔振器的变刚度半主动隔振系统并设计On-off控制、模糊控制和GA模糊控制算法.测试结果表明:MRE的储能模量在磁感应强度为600 mT时达到饱和,磁流变效应达到2 000%以上;MRE隔振器的变刚度特性明显,当线圈电流从3 A变化为-3 A时,等效刚度从74.216 kN/m增加到137.128 kN/m,增加了84.8%;经过优化后的GA模糊控制效果提升了10%以上,三种控制算法对位移响应峰值的控制效果达到50%以上,对位移RMS值的控制效果达到60%以上.结果表明:经过优化后的GA模糊控制效果提升明显,磁流变弹性体隔振器可以有效应用于变刚度半主动隔振控制系统.
In order to explore the feasibility of magnetorheological elastomer(MRE)used in variable stiffness semi-active vibration isolation,silicone rubber based MRE was prepared;the MRE isolator was designed and manufactured;the MRE material and the performance of the isolator were tested;the variable stiffness semi-active vibration isolation system based on MRE isolator was built,and the on-off control,fuzzy control and GA fuzzy control algorithms were designed.The test results show that the storage modulus of MRE reaches saturation when the magnetic induction intensity is 600 mT,and the magnetorheological effect reaches more than 2000%;the variable stiffness characteristic of MRE isolator is obvious,when the coil current changes from 3 A to-3 A,and the equivalent stiffness increases from 74.216 kN/m to 137.128 kN/m with an increase of 84.8%.After optimization,the GA fuzzy control effect is improved by more than 10%,and the control effect of the three methods on the peak value of displacement response is more than 50%,and the control effect on the RMS value of displacement is more than 60%.The results show that the effect of GA fuzzy control is obviously improved after optimization,and the magnetorheological elastomer vibration isolator can be effectively applied to the semi-active vibration isolation control system with variable stiffness.
作者
黄学功
刘涛
马伟佳
张广
HUANG Xuegong;LIU Tao;MA Weijia;ZHANG Guang(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2021年第8期27-36,共10页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(51675280)。
关键词
智能材料
磁流变弹性体
变刚度
振动控制
基础隔震
intelligent materials
magnetorheological elastomer
variable stiffness
vibration control
base vibration isolation
