新型车辆机电悬架的正实优化与性能分析  

Positive real optimization and performance analysis of new type vehicle electromechanical suspension

作　　者：仇成群[1] 沈钰杰 施德华[3] QIU Chengqun;SHEN Yujie;SHI Dehua(School of Physics and Electronic Engineering,Yancheng Teachers University,Yancheng 223001,China;Hunan Provincial Key Lab for Key Technology of High-performance Intelligent Manufacturing of Mechanical Equipment,Changsha University of Technology,Changsha 410114,China;Automotive Engineering Research Institute,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]盐城师范学院物理与电子工程学院,江苏盐城223001 [2]长沙理工大学,机械装备高性能智能制造关键技术湖南省重点实验室,长沙410114 [3]江苏大学汽车工程研究院,江苏镇江212013

出　　处：《振动与冲击》2021年第21期76-81,共6页Journal of Vibration and Shock

基　　金：中国博士后科学基金(2019M651723);汽车新技术安徽省工程技术研究中心开放基金(QCKJ202003);机械装备高性能智能制造关键技术湖南省重点实验室(长沙理工大学)开放基金资助项目(2020YB07);江苏省高等学校自然科学研究项目(19KJB580001)。

摘　　要：含有惯容器、弹簧和阻尼器三类机械网络元件组成车辆悬架系统由于元件众多,难以实现工程应用。针对上述问题,基于机电相似性理论,提出一种车辆机电悬架的参数优化设计方法,在综合考虑汽车行驶过程中垂向运动和俯仰运动的四自由度车辆机电悬架半车动力学模型基础上,探索应用机电惯容器的新型车辆机电悬架对汽车动态性能的提升效果。对于车辆悬架的多参数多约束优化问题,在考虑传递函数正实性和悬架动态性能约束的条件下,采用改进的粒子群算法对三种不同模式的车辆机电悬架的主要参数进行优化求解,并利用机电惯容器与外端电网络进行网络综合被动实现。数值仿真结果表明:在单目标优化条件下,新型车辆机电悬架的车身加速度均方根值和俯仰角加速度均方根值分别降低了26.5%和18.3%,在同时考虑双目标优化条件下可降低15.5%和11.4%,所提出的车辆机电悬架的动态隔振性能比传统被动悬架有了显著的提高,为悬架设计方法提供了新思路。A vehicle suspension system consisting of three kinds of mechanical network elements including inerters,springs and dampers is difficult to realize engineering application because of its many components.Here,aiming at the above problem,based on the theory of electromechanical similarity,a parametric optimization design method for vehicle electromechanical suspension was proposed.Based on a 4-DOF semi-vehicle dynamic model of vehicle electromechanical suspension simultaneously considering vehicle vertical and pitching motions in its driving process,the improving effect of vehicle dynamic performance with the new type vehicle electromechanical suspension using electromechanical inerter was explored.For the multi-parameter and multi-constraint optimization problem of vehicle suspension,under conditions of considering positive-realness of transfer function and suspension’s dynamic performance constraints,the improved PSO algorithm was used to solve and optimize main parameters of 3 different modes of vehicle electromechanical suspension,and electromechanical inerter and external-end electric network were used to do passive realization of network synthesis.The numerical simulation results showed that under single objective optimization condition,RMS values of vehicle body acceleration and its pitch angle acceleration using the new type vehicle electromechanical suspension decrease by 26.5%and 18.3%,respectively;while under dual-objective optimization condition,they decrease by 15.5%and 11.4%,respectively;the dynamic vibration isolation performance of the vehicle with the proposed electromechanical suspension is significantly improved compared to that with the traditional passive suspension;the study results can provide a new idea for suspension design method.

关 键 词：车辆 机电悬架 半车模型 惯容器 正实综合 

分 类 号：U463.33[机械工程—车辆工程]