摘要
基于二次调节的车辆轮桥模拟加载系统,通过对控制系统的分析可知,由于其转速控制系统和转矩控制系统间存在较强耦合作用,主要包括机械耦合和液压耦合,如果不对系统进行解耦,这些耦合干扰会使系统的控制精度明显降低,严重地影响着系统的控制性能。为了消除子系统间的耦合干扰,本文提出了两种解耦方法。方法一是在系统中加入解耦元件,通过求解解耦元件实现系统的解耦控制;方法二是在系统中加入鲁棒补偿器,通过鲁棒控制进行解耦。仿真结果表明:利用解耦元件的解耦控制对机械耦合具有很好的解耦效果,但对液压耦合不起作用;鲁棒解耦控制,对机械耦合和液压耦合都具有很好的解耦效果。
Focusing on the secondary regulation simulation loading system for the vehicle＇s wheels and transmission bridges, it is found that there is the strong coupling effects in its velocity control system and torque control system, mainly including hydraulic coupling and mechanical coupling. The system control accuracy is significantly reduced and the coupling interferences seriously affect the system performance. In order to eliminate the coupling interference between the subsystems, two methods were presented, one is to add a decoupling element and the deeoupling control of the system is achieved by solving the decoupling element; The another is to add a robust control compensator and the decoupling control of the system is achieved by robust control. Simulation results show that good effect on the mechanical coupling is obtained by adding decoupling element, but there is no effect on the pressure interference, while the robust control can not only suppress the mechanical fluctuation, but also suppress the pressure fluctuation interference greatly.
出处
《机械科学与技术》
CSCD
北大核心
2014年第7期1087-1090,共4页
Mechanical Science and Technology for Aerospace Engineering
关键词
二次调节
控制系统的分析
耦合干扰
解耦
鲁棒控制
computer simulation
control system analysis
controllers
coupling interference
decoupledcontroller
robust control
secondary regulation
