往复式压缩机气量调节工况下的内模解耦PID控制策略研究  

Research on decoupling IMC-PID control strategy for reciprocating compressor under the condition of stepless flow control

作　　者：洪槐斌 刘雯华 张进杰 HONG Huaibin;LIU Wenhua;ZHANG Jinjie(Beijing University of Chemical Technology,Diagnosis&Self-Recovery Engineering Research Center,Beijing 100029,China)

机构地区：[1]北京化工大学机电工程学院诊断与自愈工程研究中心,北京100029

出　　处：《流体机械》2021年第10期29-35,共7页Fluid Machinery

基　　金：国家重点研发计划项目(2016YFF0203305);中央高校基本科研业务费专项资金资助项目(JD1912);压缩机技术国家重点实验室(压缩机技术安徽省实验室)开放基金项目(SKL-YSJ201808);重庆市技术创新与应用发展专项能上项目(cstc2020jscx-msxm0411)。

摘　　要：针对往复压缩机气量调节系统具有多变量强耦合的特点,设计了一种基于前馈补偿作用的内模解耦PID控制器。该控制器融合了内模控制结构灵活和PID控制易于调参的优势,应用系统辨识的方法建立了气量调节的控制数学模型;采用前馈补偿解耦并将内模控制器调整为PID结构以减少控制系统的参数数量。数值仿真试验表明:各级排气压力在设定值变化或因工艺波动情况下的调节时间均减少约60%,超调量降低至0左右,各项时域性能指标较其他控制器都为最优。研究结果表明本文提出的内模解耦PID控制器具有优异的设定值跟踪性能、解耦及鲁棒性能,具有在工业现场实际应用的前景。An internal mode decoupling PID controller based on feed-forward compensation was designed for stepless flow control system of reciprocating compressor with strong coupling and multiple variables.The controller combines the advantages of the flexible structure of internal mode control and the convenience of PID parameter setting.The control mathematical model of the system was established by applying the system identification method.By adjusting the internal model controller to the structure of PID,the number of adjustment parameters of the control system was reduced.Numerical simulations show that the regulation time for exhaust pressure of each stage was reduced by about 60% and the overshoot was reduced to about 0 when the set-point was changed or there was process fluctuation.Meanwhile,all the time domain performance indicators of the proposed controller were optimal compared to other controllers.The results show that the proposed decoupling IMC-PID controller has excellent set-point tracking performance,decoupling performance and robustness,and has the potential to be widely used in industrial sites.

关 键 词：内模控制 解耦 气量调节 节能 

分 类 号：TH45[机械工程—机械制造及自动化]