发动机电磁气门驱动的LQR法软着陆控制  

Soft landing control of electromagnetic valve actuation for engines by using LQR

作　　者：黄荣纬[1] 赵雨东[1] 

机构地区：[1]清华大学汽车安全与节能国家重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2007年第8期1338-1342,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(50175055)

摘　　要：为减轻发动机电磁气门驱动(electromagnetic valveactuation,EVA)的落座冲击,对EVA初始化和过渡过程的前期都用开环控制,运动后期,即当衔铁/气门接近落座位置时采用线性二次调节器(linear quadratic regulator,LQR)法控制落座速度,并对作者研制的EVA建立了数学模型,将其在落座位置附近线性化,编制了控制软件。在EVA实验测试系统上实现了初始化、单次过渡过程控制以及EVA连续动作控制。LQR法的3个状态量是实测的衔铁/气门位移、速度和线圈电流。结果表明,EVA初始化、单次过渡过程以及EVA连续动作的落座速度分别是0.05 m/s、0.06m/s和0.20 m/s。To eliminate valve seating impacts of electromagnetic valve actuation （EVA） for automotive engines, the early stages of both the initialization and the transition are open-loop controlled in EVA systems. The later stage when the armature/valve closes to the seating position is then controlled using a linear quadratic regulator （LQR）. A control ＂system was developed based on an EVA control model linearized near the seating position. Tests of the EVA show a seating velocity of 0. 05 m/s during initialization, 0. 06 m/s during a one way transition, and 0. 20 m/s during continuousoperation.

关 键 词：汽车发动机 气门机构 可变气门驱动 电磁气门驱动 

分 类 号：TK413.4[动力工程及工程热物理—动力机械及工程]