基于Luenberger滑模观测器的气缸压力估计  

Engine Cylinder Pressure Estimation Using Luenberger Sliding Mode Observer

作　　者：郑太雄[1] 寇晓培 李永福[2] 杨新琴[2] 

机构地区：[1]重庆邮电大学先进制造工程学院,重庆400065 [2]重庆邮电大学自动化学院,重庆400065

出　　处：《内燃机工程》2016年第4期173-180,共8页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金项目(61304197);重庆市教委科学技术研究项目(KJ130506);重庆邮电大学青年基金项目(A2012-78);城市交通车路协同控制仿真系统开发项目(cstc2014yykfb40001)

摘　　要：针对SI发动机模型中存在的参数扰动和不确定性问题,基于发动机非线性状态方程,设计了Luenberger滑模观测器。利用Lyapunov稳定性定理和滑模理论,分别设计合适的Luenberger增益和滑模增益,同时证明观测器误差系统稳定收敛。仿真结果表明:所设计的观测器不仅能够很好地处理系统存在的不确定性和参数扰动,加快跟踪速度,同时具有较高的估计精度。Aiming at the problem of the parameter perturbation and uncertainty existing in the SI engine model, a Luenberger sliding mode observer was designed to estimate the cylinder pressure based on an engine nonlinear state equation. The Luenberger gain and sliding mode gain were determined by using Lyapunov stability theorem and sliding mode theory respectively, and the stability of the observer error was proved simultaneously. The corresponding simulation results show that the proposed Luenberger sliding mode observer not only can well manage the parameter perturbation and uncertainty, but also improves the estimation precision and the tracking speed of cylinder pressure tracking.

关 键 词：内燃机 SI发动机 参数扰动 不确定性 Luenberger滑模观测器 跟踪速度 

分 类 号：TK411[动力工程及工程热物理—动力机械及工程]