化工反应器系统的最大时滞可耐受度指数求解与应用分析  

Computing and application analysis of maximum tolerable delay index for chemical reactor systems

作　　者：黄卫清 谭桂平[1] 钱宇 HUANG Weiqing;TAN Guiping;QIAN Yu(School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, Guangdong, China;School of Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China)

机构地区：[1]东莞理工学院生态环境与建筑工程学院,广东东莞523808 [2]华南理工大学化工学院,广东广州510640

出　　处：《化工学报》2018年第3期974-981,共8页CIESC Journal

基　　金：国家自然科学基金项目(21706029;21736004);广东省自然科学基金项目(2015A030310242)~~

摘　　要：化工反应器系统具体操作过程中常会受到时滞和不确定参数影响,在一些操作工况下不确定参数是不可调节的。为了保证化工系统实际操作的安全和可靠性以避免环境污染事件和人员伤害,系统所能耐受的最大时滞值非常有必要得到求解和分析。提出了含不确定参数的化工反应器系统的时滞耐受度指数问题、给出了求解和应用分析框架。首先对反应器系统进行建模,采用泰勒展开式和拉普拉斯变换将反应器系统线性化成为含不确定参数及时滞的传递函数模型。其次采用PID闭环控制的控制策略对系统进行动态响应性能测试,PID参数采用MATLAB的NCD(nonlinear control design package)模块进行优化。最后采用二分法结合系统的动态响应性能测试结果对系统所能耐受的最大时滞值τmax进行求解。以一个典型具有连续进出料的反应-分离系统为案例,对含不确定参数的反应器系统的时滞耐受度指数进行了求解和分析。研究结果表明,所提出的研究策略可以为含不确定参数的连续反应器系统的时滞耐受度指数的求解提供快速、简洁有效的方法和思路,从而提高化工反应器系统实际运行的安全和可靠性。Operation safety should be paid more attention for chemical reactor systems in the presence of uncertaintyand time delay to prevent environmental pollution events and human injury.The uncertainty deviation maybeunadjustable during the practical operation,such the maximum tolerable delay of chemical reactor systems underuncertainty should be figured out to guarantee the operation safety.A delay tolerability index problem(DTI)andcomputing framework is proposed to find the maximum tolerable delay for continuous chemical reactor systems.Firstly the continuous reactor system is linearized by Taylor series spreader formula and modeling as transformfunction by using Laplace transform.Secondly the dynamic response performance is tested for the system with PIDcontrol,where the control action is optimized by the nonlinear control design package(NCD).Finally the delaytolerability index problem(DTI)is figured out based on the bisection search method combing with dynamic responseanalysis.A continuous reactor-separator system is investigated to compute the maximum tolerable delay index whenthe expected uncertainty deviation is considered as unadjustable condition during the operation.The analysis results demonstrate that the proposed framework/strategy may provide a simple and effective tool for the computing andapplication of delay tolerability index(DTI),which is also useful for the operation safety and reliability of chemicalreactor system under uncertainty.

关 键 词：化工反应器 时滞 不确定性 优化 

分 类 号：TQ021.8[化学工程]