摘要
建立了包含半主动悬架的2自由度1/4车辆动力学模型,应用最优控制理论设计了车辆半主动悬架的LQG控制器。针对各性能指标的加权系数依靠经验选取的不足,引入层次分析法对各权重系数进行计算,并利用MATLAB/Simulink软件进行仿真试验。仿真结果表明:与被动悬架相比,采用LQG控制器的半主动悬架,可使车身加速度、悬架动行程和轮胎动变形的均方根值均有所减小,有效地减缓车身的振动,改善车辆的行驶平顺性。
A2-DOF 1/4 vehicle dynamics model including semi-active suspension is established. The LQG controller of semi-active suspension is designed by using the optimal control theory. According to the deficiencies of the determining weight coefficients of each performance indicators, the analytic hierarchy process （AHP） is adopted to calculate the weight coefficients, and the simulation test is carried out by using MATLAB/Simulink software. The simulation results show that compared with the passive suspension, the semi-active suspension with LQG controller can make the RMS value of body acceleration, suspension dynamic deflection and tire dynamic displacement decrease, effectively reduce the vibration of the vehicle, and improve the vehicle ride comfort.
出处
《汽车实用技术》
2017年第21期171-174,共4页
Automobile Applied Technology
基金
国家自然科学基金项目(No11472180
11572207)
石家庄铁道大学研究生创新项目(No.YC201712)
关键词
车辆
半主动悬架
平顺性
LQG控制
层次分析法
vehicle
semi-active suspension
ride comfort
LQG control
Analytic Hierarchy Process
