Higher order sliding mode based control scheme for air path of diesel engine

G. Murtaza, Y. Butt, A. I. Bhatti
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引用次数: 7

Abstract

This paper proposes a Higher Order Sliding Mode (HOSM) based control algorithm for air intake circuit of diesel engine. The current diesel engine is a complex system that has mechanisms like Variable Geometry Turbo charger (VGT), Exhaust Gas Recirculation (EGR) to limit the amount of exhaust emissions. Since both VGT and EGR flows are driven by the exhaust gases, there is a strong coupling between them. A nonlinear reduced order model is used for coordinated control development for VGT and EGR actuators. The proposed scheme uses Supertwisting algorithm which ensures robustness against the modeling errors and parameteric uncertainities and at the same time reducing the high frequency chattering. Simulation results have been shown on a validated full order diesel engine model to illustrate the efficacy of the scheme.
基于高阶滑模的柴油机风道控制方案
提出了一种基于高阶滑模(HOSM)的柴油机进气回路控制算法。目前的柴油发动机是一个复杂的系统,有诸如可变几何涡轮增压器(VGT),废气再循环(EGR)等机制来限制废气排放量。由于VGT和EGR气流都是由废气驱动的,因此它们之间存在很强的耦合。采用非线性降阶模型对VGT和EGR作动器进行协调控制开发。该方案采用了超扭转算法,保证了对建模误差和参数不确定性的鲁棒性,同时减少了高频抖振。在一台已验证的全阶柴油机模型上进行了仿真,验证了该方法的有效性。
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