具有可调式液力惯容器的蓄能悬架H_∞控制  

H_∞ Control for Inerter Suspension with a Variable-inertance Hydraulic Inerter

作　　者：卜祥风 谢友浩 BU Xiang-feng;XIE You-hao(School of Mechanical and Automobile Engineering,Chuzhou University,Chuzhou Anhui 239000,China;Anhui Leopaard Automobile Co.,Ltd.,Chuzhou Anhui 239000,China)

机构地区：[1]滁州学院机械与汽车工程学院,安徽滁州239000 [2]安徽猎豹汽车有限公司,安徽滁州239000

出　　处：《公路交通科技》2018年第12期118-123,共6页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(71601046);安徽省教育厅自然科学研究项目(KJ2015B20);安徽省高校自然科学研究项目(KJ2016B12);安徽省高校省级质量工程项目(2016zy090)

摘　　要：为了解决传统定惯容油缸马达液力惯容器无法调节对外输出力和飞轮换向有较大冲击的问题,通过引入液压单向桥和并联比例阀,构成可调式油缸马达液力惯容器,组成蓄能悬架系统。以可调惯容器为对象,通过建立悬架系统动力学模型,为蓄能悬架系统设计了H_∞控制器。通过适时调节惯容器的对外输出力,使得蓄能悬架起到良好的减振效果。在Matlab/Simulink环境下对H_∞控制蓄能悬架进行了数值仿真。频域仿真结果表明:在车身加速度方面,H_∞控制蓄能悬架在人体较敏感的2 Hz附近低频范围相比于被动悬架幅值下降明显,削减了悬架低频共振峰。同样,在20 Hz附近的高频范围内,H_∞控制蓄能悬架的幅值也有所降低,削减了悬架高频共振峰。只在3～10 Hz的中高频带,H_∞控制蓄能悬架幅值略有升高。H_∞控制蓄能悬架动行程的改善效果和趋势与车身加速度类似。H_∞控制蓄能悬架的轮胎动载荷幅值在0. 1～1. 5 Hz的低频带和3～15 Hz的中高频带有所升高,但同样在2 Hz和20 Hz附近削减了共振峰。时域仿真结果表明:H_∞控制蓄能悬架车身加速度、悬架动行程和车轮动载荷均方根值比被动悬架分别改善了58. 12%,13. 53%,51. 17%,H_∞蓄能悬架相比于传统悬架在行车舒适性和操纵安全性方面都有较大改善。Traditional fixed-inertance cylinder-motor hydraulic inerter cannot regulate output force,and great impact come to being when its flywheel changing direction of rotation.To solve this problem,a variable- inertance cylinder-motor hydraulic inerter which consists of hydraulic unidirectional rectifier bridge and a parallel proportional valve is designed,and an inerter suspension is built.Taking a variable-inertance inerter as the research object,through building dynamic model of suspension system,timely regulates output force of the inerter,the inerter suspension achieves good damping effect.Numerical simulation of H∞control inerter suspension is carried out in Matlab/Simulink.The simulation in frequency domain shows that (1)H∞ control inerter suspension could significantly reduce the body vertical vibration compared to passive suspension,within lower frequency band near 2Hz where a human body is more sensitive to vibration,thus the resonance peak of suspension in lower frequency is reduced too.(2)Likewise,within higher frequency near 20Hz,H∞control inerter suspension could reduce the body vertical vibration,therefore the resonance peak of suspension in higher frequency is also reduced.Within 3-8Hz only,the body vertical vibration of H∞control inerter suspension increased slightly.(3)The suspension deflection of H∞control inerter suspension has a similar improving effect and tendency as the body vertical vibration.The tire dynamic load of H∞control inerter suspension increased slightly within 0.1-1.5Hz and 3-15Hz,but the resonance peaks of suspension at 2Hz and 20Hz are reduced.Simulation in time domain shows that the root mean square values of body acceleration,suspension travel,and tire dynamic load of H∞control inerter suspension are reduced by 58.12%,13.53%,51.17%respectively compared to passive suspension,H∞control inerter suspension can improve ride comfortable and handling safety effectively compared to passive susoension.

关 键 词：汽车工程 蓄能悬架 数值仿真 H∞控制 惯容器 线性矩阵不等式方法 

分 类 号：U463.33[机械工程—车辆工程]