液压混合动力车辅助驱动单元的最优控制

Application of Optimal Control in the Assistance Drives of the Unit of Hydraulic Hybrid Power Vehicle

液压混合动力车是一种新型环保节能车辆,以液压蓄能器和变量泵/马达为核心组成了制动能量再生系统。本文建立了液压混合动力车辅助驱动单元即变量泵/马达控制系统的数学模型,运用最优控制原理设计了最优控制器,并利用MATLAB对控制系统进行了仿真分析,仿真结果表明所设计的最优控制器有效的降低了系统响应的超调量,加快了系统响应时间,使系统具有良好的动态性能。

Hydraulic Hybrid Power Motor Vehicle is a new type of environmental and energy saving vehicle.The braking power regeneration system is constructed including hydraulic accumulator and double direction reversible hydraulic pump.The mathematic model of the system is built.The optimal controller is designed on the basis of optimal control principle.Then the paper simulates and analyzes the system in MATLAB.The result illustrates that the optimal controller designed decreases the overshoot of system＇s response effectively and the response time is quickened.As a result,the dynamic characteristics of the designed system is well.