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基于Kriging模型的高压共轨柴油机标定应用

DOI: 10.15918/j.tbit1001-0645.2015.03.005

Keywords: 试验设计 Kriging建模 共轨发动机 标定

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Abstract:

为解决电控柴油机随着控制参数的增多造成的标定工作量大、工作效率低的问题,将基于模型的标定方法应用于VMR425DOHC高压共轨柴油机的经济性优化过程中. 采用LHS-ESE算法设计控制参数的试验空间,根据获得的试验数据建立控制参数与响应数据之间的Ordinary Kriging代理模型,并在此基础上进行优化得到最终的控制参数MAP. 试验结果表明,对比常规标定方法,采用基于模型的标定可以使试验样本点选取更加合理,大幅提高试验标定效率,Kriging代理模型的使用使预测结果更为精确,最大误差率在2%以内,满足共轨柴油机建模需要,优化结果使发动机燃油经济性区域得到扩大

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