基于模糊PID的非道路国三排放防爆柴油机喷油量闭环控制方法  

A Closed-loop Control Method for Fuel Injection Rate of Non Road NationalThree Emission Explosion-proof Diesel Engines with Fuzzy PID

作　　者：马海兵 MA Hai-bing(State Energy Group Shendong Coal Group Co.,Ltd.,Yulin 719315,China)

机构地区：[1]国能神东煤炭集团有限责任公司,陕西榆林719315

出　　处：《液压气动与密封》2024年第11期86-91,共6页Hydraulics Pneumatics & Seals

摘　　要：常规非道路国三排放防爆柴油机喷油量闭环控制方法主要采用动态跟踪实现喷油量的控制,忽略了不确定性因素的影响,导致控制结果的空燃比与理想数值偏差较大,对此,提出基于模糊PID的非道路国三排放防爆柴油机喷油量闭环控制方法。首先,根据平均有效压力参数建立非道路国三排放防爆柴油机喷油系统模型;然后,在该模型中添加PID控制器,并在PID控制的基础上,结合模糊逻辑处理采样值的不确定性,设计模糊PID下的喷油量控制框架;最后,利用模糊PID的反馈参数作为控制信号对非道路国三排放防爆柴油机的喷油量进行闭环控制。实验分析可知,在此方法控制下的柴油机空燃比结果与理想空燃比数值更为接近,最大偏差仅为1.96,满足非道路国三排放防爆柴油机的实际应用需求。The conventional closed-loop control of fuel injection quantity for non road national three emission explosion-proof diesel engines mainly adopts dynamic tracking to achieve fuel injection quantity control,ignoring the influence of uncertainty factors,resulting in a large deviation between the air fuel ratio of the control results and the ideal value.A closed-loop control method for fuel injection quantity of non road national three emission explosion-proof diesel engines based on fuzzy PID is proposed.Firstly,establish a non road national three emission explosion-proof diesel engine fuel injection system model based on the average effective pressure parameter.Then,a PID controller is added to the model,and based on PID control,a fuel injection control framework under fuzzy PID is designed by combining fuzzy logic to handle the uncertainty of sampling values.Finally,the feedback parameters of fuzzy PID are used as control signals to perform closed-loop control on the fuel injection rate of non road national three emission explosion-proof diesel engines.Experimental analysis shows that the air-fuel ratio of the diesel engine under the control of the proposed method is closer to the ideal air-fuel ratio value,with a maximum deviation of only 1.96,which can meet the practical application needs of non road national three emission explosion-proof diesel engines.

关 键 词：防爆柴油机 喷油量控制 模糊PID 闭环控制 非道路柴油机 国三排放柴油机 

分 类 号：TH137[机械工程—机械制造及自动化] V233[航空宇航科学与技术—航空宇航推进理论与工程]