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基于BP神经网络的车用汽油机过渡工况空燃比多步预测模型
Multi-step Predictive Model for Air/Fuel Ratio of Gasoline Engine at Transient Conditions Based on Back Propagation Neural Network
【摘要】 为克服车用汽油机空燃比传输延迟对空燃比控制精度的影响,提出了一种基于BP神经网络的空燃比多步预测模型。通过对空燃比数学模型的分析,确定神经网络空燃比多步预测模型的输入向量,同时为提高空燃比预测精度,在神经网络输入向量中增加反映空燃比变化趋势的导数信息。以HL495发动机过渡工况试验数据进行仿真,结果表明该方法能精确预测过渡工况空燃比。
【Abstract】 A multi-step predictive model for air/fuel ratio of gasoline engine at transient conditions is presented.By analyzing the model,the input vectors for neural network-based multi-step predictive model are determined.Meanwhile,the input vectors include the derivatives of air/fuel ratio for increasing the prediction accuracy of air/fuel ratio.The results well agree with experiment data at transient conditions of HL495 engine,showing high accuracy of prediction model.
【关键词】 汽油机;
过渡工况;
空燃比;
神经网络;
多步预测;
【Key words】 Gasoline engine; Transient conditions; Air fuel ratio; Neural networks; Multi-step prediction;
【Key words】 Gasoline engine; Transient conditions; Air fuel ratio; Neural networks; Multi-step prediction;
【基金】 国家自然科学基金项目(50276005)资助
- 【文献出处】 汽车工程 ,Automotive Engineering , 编辑部邮箱 ,2006年09期
- 【分类号】U464.171
- 【被引频次】6
- 【下载频次】223