摘要
基于线性二次型最优控制理论和线性矩阵不等式处理方法,提出一种适用于汽车电子节气门的位置离散最优预见控制算法,该算法仅通过一组滑动电位计来测量节气门阀片角度位置实现闭环控制。针对节气门的实际使用环境,建立了离散化的节气门状态空间模型,利用状态转移法构建了包含目标信号的扩大误差系统;考虑实际系统中节气门物理参数难以辨识的特点和外部扰动力矩等不确定因素的影响进行了仿真,并基于快速控制原型技术进行了试验验证。仿真和试验结果均表明,所设计的位置最优预见控制算法能够快速准确地跟踪目标开度信号,增强了电子节气门控制系统的稳定性和鲁棒性。
Based on the theories of linear quadratic regulator （LQR） control and linear matrix inequality （LMI）, a scheme of discrete-time optimal preview position control algorithm for automotive electronic throttle control （ETC） system was proposed. The presented throttle valve position tracking control algorithm consisted of the state-feedback control, discrete integrator, and preview feed-forward control. The closed-loop controller was realized by only utilizing a low-cost sliding potentiometer which was used to measure the angle position of the throttle valve. To track the position of automotive electronic throttle valve, the discrete-time state space model was firstly established for the automotive ETC system. Then, the augmented error system which contained future position reference information was built by using the state transformation method instead of the traditional difference method, which helped to simplify the structure of the augmented error system. In simulations, the physical parameters uncertainty and external disturbance torque of the real automotive electronic throttle control system were also considered, and the simulation results were verified by bench tests for throttle through utilization of the rapid control prototyping （RCP） technology. Both simulation and test results demonstrated that the proposed discrete-time optimal preview position control algorithm was able to effectively improve the transient performance and robustness of the ETC system while guaranteeing the tracking accuracy. Hence, the application of the presented control scheme on the ETC system can further improve the fuel economy, dynamic and exhaust performance of gasoline engine.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2017年第4期349-354,共6页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金项目(U1234208)
汽车车身先进设计制造国家重点实验室自主项目(71575005)
关键词
汽车电子节气门
位置跟踪
最优预见控制
快速控制原型
鲁棒性
automotive electronic throttle
position tracking
optimal preview control
rapid control prototyping
robustness
