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LPV Controller Design for Diesel Engine SCR Aftertreatment Systems based on Quasi-LPV Models

机译:基于准LPV型号的柴油机SCR后处理系统LPV控制器设计

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This paper presents linear parameter-varying (LPV) controller design for the urea-based selective catalytic reduction (SCR) system in diesel engines to reduce nitrogen oxides (NOX) and ammonia (NH3) emissions. Although such LPV SCR controller design has been previously developed, this paper extends it in various ways. The extension includes the usage of NH3 slip sensor for feedback LPV control, the adoption of NOX and NH3 measurements downstream of the catalyst as gain-scheduling parameters, the simultaneous design of feedforward and feedback LPV controllers, and a robustness analysis of the LPV controllers. Quasi-LPV SCR models derived from an existing control-oriented nonlinear parameter-varying model are utilized in the LPV controller design. The LPV controller performance is demonstrated based on an SCR simulation utilizing experimentally obtained engine-out NOX, and exhaust gas temperatures and flow rates. It is shown that the LPV controller provides satisfactory emission performance, as well as robustness against sensor noise and model parameter uncertainty.
机译:本文介绍了柴油发动机中基于尿素的选择性催化还原(SCR)系统的线性参数变化(LPV)控制器设计,以减少氮氧化物(不 x )和氨(NH 3 )排放。虽然先前已经开发出这种LPV SCR控制器设计,但本文以各种方式延伸。扩展包括NH的使用 3 防滑传感器,用于反馈LPV控制,采用否 x 和nh. 3 催化剂下游的测量作为增益调度参数,同时设计前馈和反馈LPV控制器,以及LPV控制器的稳健性分析。源自现有的面向控制的非线性参数变化模型的准LPV SCR模型在LPV控制器设计中使用。 LPV控制器性能是基于SCR仿真来展示,使用实验获得的发动机输出NO x ,以及废气温度和流速。结果表明,LPV控制器提供了令人满意的发射性能,以及对传感器噪声的鲁棒性和模型参数不确定性。

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