发动机电磁气门驱动的LQR法软着陆控制

为减轻发动机电磁气门驱动(electromagnetic valve actuation,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0.05m/s、0.06m/s和0.20m/s。

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

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 continuous operation.