强制循环蒸发系统的智能解耦控制  

Intelligent decoupling control of forced-circulation evaporation system

作　　者：李善强[1] 石宇静[1] 柴天佑[2] 陈东彦[1] 

机构地区：[1]哈尔滨理工大学应用数学系,黑龙江哈尔滨150080 [2]东北大学自动化研究中心,辽宁沈阳110004

出　　处：《电机与控制学报》2011年第6期84-90,96,共8页Electric Machines and Control

基　　金：国家自然科学基金(10771047);黑龙江省自然科学基金(F200820;A200811);黑龙江省教育厅科学技术研究项目(11521045;11551090)

摘　　要：针对一类具有多变量、强耦合、强非线性特性的复杂工业过程,以强制循环蒸发系统为例,提出了由多模型预测解耦控制器和PID控制器串级的智能解耦控制策略。外层的多模型预测解耦控制器既要保证强制循环蒸发系统的出料密度快速跟踪生产工艺所确定的出料密度目标值,又要使蒸发器的液位保持在生产工艺规定范围内,同时给出内层的出料流量和加热蒸汽流量的设定值。内层的PID控制器根据流量设定值与实际流量测量值的偏差来调节阀门的开度。建立了强制循环蒸发系统的动态模型,并以该动态模型作为虚拟仿真对象,进行了仿真实验,验证了所提控制策略的有效性。An intelligent decoupling control strategy that is composed of multiple models decoupling predictive controller and PID controller in a cascade structure was presented for a class of complex industrial processes which has multivariable,strong couplings between loops and high nonlinearities.This control strategy was applied in forced-circulation evaporation system.The multiple models decoupling predictive controller of outer level that guarantees the discharging density track the target value determining by production technology and liquid level remains in range prescribing by production technology,simultaneously gives setpoints of discharging flow rate and heated steam flow rate to the controllers at the inner level.The PID controller of inner level manipulated the opening of the control valve by comparing the difference between the flow rate setpoint and the flow rate measurement.A dynamic model of the forced-circulation evaporation system was established.The dynamic model is chosen as virtual simulation plant.And the simulation experiment study is illustrated to verify the effectiveness of the proposed control scheme.

关 键 词：强制循环蒸发系统 智能解耦控制 预测控制 PID控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]