内燃机工程2018，Vol.39Issue(2)：9-13,5.DOI:10.13949/j.cnki.nrjgc.2018.02.002
基于LS-SVM逆系统的汽油机瞬态空燃比复合控制研究
Composite Control of Transient Air-Fuel Ratio for Gasoline Engine Based on LS-SVM Inversion
摘要
Abstract
To achieve effective control of transient air-fuel ratio for gasoline engines,a composite control method is proposed,which consists of inverse model feedforward based on least squares support vector machine(LS-SVM)and feedback control with model-free adaptive control(MFAC).The inverse model of transient air-fuel ratio system was set up with LS-SVM,which is able to dynamic compensate intake flow with feedforward control.And a MFAC feedback controller was used to as a compensation both internal and external disturbance in real time.Then the inverse model and the composite control method are used to simulate transient operating conditions which are compared with the actual acquisition of the air-fuel ratio. The results show that the inverse model based on LS-SVM can accurately approximate the air fuel ratio transient process,and this method has stronger robustness and anti-interference combine the MFAC feedback control.Therefore,the composite control strategy has good control performances and can improve the control precision of air-fuel ratio in transient conditions.关键词
汽油机/空燃比/最小二乘支持向量机/无模型自适应/瞬态工况/复合控制Key words
gasoline engine/air-fuel ratio/least squares support vector machines/model-free adaptive control/instantaneous condition/composite control分类
能源科技引用本文复制引用
宋丹丹,李岳林,解福泉..基于LS-SVM逆系统的汽油机瞬态空燃比复合控制研究[J].内燃机工程,2018,39(2):9-13,5.基金项目
国家自然科学基金项目(51176014) （51176014）
湖南省自然科学基金项目(2016332003) （2016332003）
河南省科技攻关项目(182102210278)National Natural Science Foundation of China(51176014) （182102210278）
Natural Science Foundation of Hunan Province(2016332003) （2016332003）
Project of Science and Technology of Henan Province(182102210278) （182102210278）
