基于改进分数阶PID的活套高度控制  

Looper height control based on improved fractional order PID

作　　者：周建新 侯宏瑶 郑日成 Zhou Jianxin;Hou Hongyao;Zheng Richeng(College of Electrical Engineering,North China University of Science and Technology,Tangshan 063000,China)

机构地区：[1]华北理工大学电气工程学院,河北唐山063000

出　　处：《锻压技术》2024年第2期136-145,共10页Forging & Stamping Technology

基　　金：河北省自然科学基金资助项目(F2018209201)。

摘　　要：为解决板带热连轧过程中活套高度控制问题,提出了一种加入淘汰机制的麻雀搜索算法(SSA)与分段式ITAE性能指标的自适应参数整定方法。该方法引入了2^(N)分段Tent混沌映射与末位淘汰机制来加强SSA的全局搜索能力与局部收敛精度,并通过计算误差变化速率将传统ITAE性能指标改进为一种自适应函数以符合分数阶PID在不同阶段的要求。将该方法与其他整定方法进行对比并应用在活套高度控制的仿真试验,对系统响应曲线及上升时间、调节时间、超调量和稳定误差等性能指标进行分析,证明了改进的控制方法可使被控对象获得良好的动态特性。In order to solve the looper height control problem in the hot strip rolling process,a sparrow search algorithm(SSA)with an elimination mechanism and an adaptive parameter tuning method of integral time absolute error(ITAE)performance index were proposed,which introduced 2^(N) segment Tent chaotic mapping and last elimination mechanism to enhance the global search capability and local con-vergence accuracy of SSA,and the traditional ITAE performance indexes were improved by calculating the error change rate into an adap-tive function to comply with the requirements of fractional order PID in different stages.The method was compared with other tuning meth-ods and applied on the simulation test of looper height control.The system response curve and other performance indexes such as rise time,adjustment time,overshoot and stability error were analyzed,proving that the improved control method could make the controlled objects obtain good dynamic characteristics.

关 键 词：热连轧 活套高度控制 分数阶PID 混沌映射 淘汰机制 麻雀搜索算法 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程] TP273[自动化与计算机技术—控制科学与工程]