基于模型的汽车发动机速度滚动优化控制

Model based moving horizon optimization control of automotive engine speed

基于力矩的发动机控制思想,利用实际物理模型和脉谱图数据,建立了发动机速度控制的分段线性化模型,模型充分考虑了系统的外部干扰和执行器饱和约束。提出了一种带有新的优化上界的鲁棒滚动时域优化控制策略,并应用于发动机速度控制,在保证发动机速度跟踪稳定的同时,系统具有一定的燃油经济性和抗干扰能力,并且控制输入进气在节气门工作范围之内。在商业化的发动机模型EnDYNA上的仿真结果表明,设计的控制器能够达到理想的控制性能。

A piece-wise linearized engine speed control model was built based on the idea of torque based engine control using the practical physical model and some of the engine runtime map data.The proposed model fully takes consideration of the external load disturbance and the saturation constraint of actuator.A robust moving horizon optimization control strategy with new performance optimization upper bound was proposed.It was applied to engine speed control,which can guarantee engine speed tracking,improve fuel economy and the ability of anti-disturbance.It is also capable to control the input air intake within the limit of the throttle.A commercial engine model EnDYNA was used to evaluate the performance of the controller.Simulation results show that the proposed controller can achieve desired performance.