时域硬约束下的汽车主动悬架H_2/H_∞控制策略研究  

Research on H_2/H_∞ Control Strategy for Vehicle Active Suspension Under Time Domain Constraints

作　　者：张丽萍[1] 弓栋梁 

机构地区：[1]辽宁工业大学汽车与交通工程学院,辽宁锦州121001

出　　处：《辽宁工业大学学报（自然科学版）》2017年第3期157-160,164,共5页Journal of Liaoning University of Technology(Natural Science Edition)

基　　金：辽宁省软科学研究计划项目(JP2016017)

摘　　要：为了能够更好的改善汽车悬架的乘坐舒适性,采用了主动悬架H_2/H_∞状态反馈控制策略。在充分考虑悬架系统时域硬约束的前提下,采用H_∞性能指标小于γ最小化H_2性能指标的设计目标,从而避免选择加权系数。以四自由度半车模型为例,把影响车辆行驶平顺性的车身垂直加速度和俯仰角加速度作为H_2性能指标进行优化。并通过时域和频域的仿真分析,验证该策略的有效性。In this paper the active suspension H2/H∞ state feedback control strategy is adopted in order to improve the ride comfort of the vehicle suspension system.Considering the time domain hard constraints of the suspension system,the design target with the H∞performance index less thanγminimized H2 performance index is adopted,so as to avoid choosing weighting coefficient.Taking four degree of freedom half car model as an example,the vertical acceleration and pitch angle acceleration of the vehicle that affect the ride comfort of the vehicle as H2 performance index are optimized.Through time domain and frequency domain simulation analysis,the effectiveness of the proposed method is verified.

关 键 词：主动悬架 半车模型 时域硬约束 H2/H∞控制 

分 类 号：U270.1[机械工程—车辆工程]