柴油机风道系统积分作用模型预测控制策略

Jingyu Zhang, Jingfei Zhang, Xinda Yang, Pingyue Zhang
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引用次数: 0

摘要

节气门、变几何涡轮(VGT)和废气再循环(EGR)的控制一直是柴油机的难题。模型预测控制(MPC)是一种有效的控制方法,该方法已成功地应用于典型的多输入多输出(MIMO)系统,如柴油机,该系统具有快速动力学、执行器约束和强耦合。在MPC控制器设计中,输出变量的选择直接影响到最终的控制性能。通过对不同输出变量选择的研究和讨论,我们提出了选择egr分数和增压压力作为输出变量,同时以氧燃比作为约束条件是有益的。此外,在EGR比上设置一个积分动作可以改善控制性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Model Predictive Control Strategy with Integral Action on the Air Path System of a Diesel Engine
It is a challenging problem in diesel engines to control throttle, variable geometry turbine(VGT)and exhaust gas recirculation (EGR). A effective method is model predictive control (MPC), which has been successfully applied to typical multi-input multi-output (MIMO) system with fast dynamics, actuator constraints, and strong couplings, such as diesel engines. In MPC controller design, the choice of output variables has a direct impact on the resulting control performance. Through investigating and discussing different selections of outputs, we propose that it is beneficial to select EGR-fraction and boost pressure as output variables while setting the oxygen fuel ratio as a constraint. Besides, equipping an integral action on the EGR ratio can improve the control performance.
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