摘要
针对被动式油气悬挂不能有效降低车辆车体垂直振动的问题,建立了肘内式半主动悬挂的动力学模型。提出了一种应用多目标输出反馈控制调节节流孔的大小,来增加行驶平顺性的方法;该方法在线性矩阵不等式(LMI)框架下,应用多目标输出反馈调节、调节流孔的大小,悬挂满足了硬约束条件,减小了扰动通道增益;研究了LMI区域极点配置在悬挂性能优化中的应用。研究结果表明:基于LMI方法的多目标输出反馈控制相较被动式油气悬挂能有效减小车辆行驶中由于外界路面扰动而产生的垂直加速度,系统的刚度特性在一定的扰动作用范围内得到优化;同时,在域内悬挂动行程、动静载荷比和阻尼减震器输出力大小均不超过约束,保证了车辆行驶中的接地性,系统极点分布满足设计要求。
Aiming at the problem that passive hydro-pneumatic suspension could not effectively reduce the vertical vibration of vehicle body,the dynamic model of elbow in semi-active suspension was established.A method to adjust the size of the throttle hole by using multi-objective output feedback control to increase ride comfort was proposed.In the framework of linear matrix inequality(LMI),the multi-objective output feedback was used to adjust the size of adjustable orifice,the suspension was satisfied with the the hard constraints and the gain of disturbance channel was reduced.The application of LMI region pole placement in suspension performance optimization was studied.The results show that comparing with passive hydro pneumatic suspension,the multi-objective output feedback control based on LMI method can effectively reduce the vertical acceleration caused by the external road disturbance,and the stiffness characteristics of the system can be optimized within a certain range of disturbance.Meanwhile,the dynamic travel,dynamic to static load ratio and the output force of damping damper in time domain do not exceed the constraints.The grounding performance of the vehicle is ensured and the pole distribution of the system meets the design requirements.
作者
胡峰波
董胜
袁朝辉
HU Feng-bo;DONG Sheng;YUAN Zhao-hui(AVIC The First Aircraft Institute,Xi an 710089,China;School of Automation,Northwestern Polytechnical University,Xi an 710129,China)
出处
《机电工程》
CAS
北大核心
2021年第5期544-551,共8页
Journal of Mechanical & Electrical Engineering
基金
国家自然科学基金青年科学基金资助项目(61705184)。
关键词
肘内式油气悬挂
动力学模型
线性矩阵不等式方法
多目标输出反馈
elbow-type hydro-pneumatic suspension
dynamic model
linear matrix inequality(LMI)method
multi-objective output feedback
