煤层气发动机供气系统流量控制策略研究  

Study on Flow Control Strategy of Gas Supply System for Coal-bed Gas Engine

作　　者：高松[1] 郎华[1] 谭德荣[1] 王洪佩[1] 

机构地区：[1]山东理工大学交通与车辆工程学院,山东淄博255049

出　　处：《计算机仿真》2011年第11期179-184,共6页Computer Simulation

基　　金：山东省自然科学基金项目(ZR2009FM029)

摘　　要：研究煤层供气系统稳定性优化控制问题,为消除煤层气浓度扰动对煤层气发动机空燃比控制稳定性差,以及甲烷浓度传感器信号响应存在的滞后,提出了一种煤层气发动机供气系统流量控制方案。通过供气管道优化设计与甲烷浓度传感器合理布置,减小了甲烷传感器信号响应滞后带来的不利影响。通过建立煤层气发动机供气系统流量控制模型,并分别对增量式PID和模糊PID的煤层气发动机供气系统流量控制策略进行仿真。仿真结果表明,模糊PID控制策略控制性能更好,控制效果更理想、鲁棒性更强,较好地解决了存在煤层气浓度扰动时的供气系统流量控制问题。In order to eliminate the adverse effects of coal-bed gas concentration disturbance to coal-bed gas engine air-fule ratio control and the large pure time-delay existed in signal response of methane transducer,a flow control plan was proposed for gas supply system of coal-bed gas engine.By optimizing the gas pipeline design and methane transducer placement,the adverse effects produced by the methane transducer signal response were decreased.Based on this,the flow control model of gas supply system for coal-bed gas engine was bulit,and the flow control strategy of gas supply system based on incremental PID control and fuzzy-PID control were researched and simulated.The simulation results show that fuzzy PID control strategy has better control performance,optimal control effect and stronger robustness,and the flow control problem of the gas supply system casued by coal-bed gas concentration disturbance is well solved.

关 键 词：煤层气发动机 流量控制 大纯滞后 

分 类 号：TK431[动力工程及工程热物理—动力机械及工程] TP391.9[自动化与计算机技术—计算机应用技术]