MPC-Based Speed Tracking Control Design for Spark-Ignition Engines
MPC-Based Speed Tracking Control Design for Spark-Ignition Engines
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DOI：
10.9746/jcmsi.8.201
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发表时间：
2015
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通讯作者：
Mingxin Kang;F. Tahir;T. Shen;T. Ohtsuka
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文献类型：
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作者：
Mingxin Kang;F. Tahir;T. Shen;T. Ohtsuka
本文提出了一种基于MPC的发动机转速跟踪控制器，并从ILQ设计的角度研究了实际控制性能的整定方法。首先，基于发动机均值模型的非线性系统动力学通过反馈线性化方法转化为线性跟踪误差动力学。在此基础上，设计了MPC速度跟踪控制器。为了实现控制性能的方便调整，MPC性能指标的二次型权重计算相对于一个单一的调整参数的LQ最优问题的逆最优性条件的装置。此外，自适应补偿器的引入，以保证控制精度，即使预测模型是不是很准确。在3.5L-V6汽油机台架上进行了实验，结果表明，所提出的MPC控制器对转速跟踪具有良好的控制效果，验证了所提出的参数整定方法的有效性。
This paper proposes an engine speed tracking controller based on the MPC scheme and investigates a tuning method for the practical control performance from the viewpoint of the ILQ design. First, the nonlinear system dynamics based on the engine mean-value model is transformed to the linear tracking error dynamics by the feedback linearization method. Then the MPC speed tracking controller is designed based on the derived tracking error dynamical model. To achieve the convenient adjustment of the control performance, the quadratic weightings in MPC performance index are calculated with respect to a single tuning parameter by means of the inverse optimality conditions of the LQ optimal problem. Moreover, an adaptive compensator is introduced to guarantee the control precision even if the predictive model is not very accurate. Experiments are conducted in the 3.5L-V6 gasoline engine test bed, the results demonstrate the good control effects for speed tracking by the proposed MPC controller and also confirm the validity of the proposed tuning approach.