Synthesis identification analysis for closed loop system  

作　　者：WANG Jianhong RICARDO A.Ramirez-Mendoza 

机构地区：[1]School of Electronic Engineering and Automation,Jiangxi University of Science and Technology,Ganzhou 343100,China [2]School of Engineering and Sciences,Tecnologico de Monterrey,Monterrey 64849,Mexico

出　　处：《Journal of Systems Engineering and Electronics》2021年第4期939-946,共8页系统工程与电子技术（英文版）

摘　　要：The existing theories for closed loop identification with the linear feedback controller are very mature.To apply the existed theories directly in the control field,we propose a new idea about replacing the original unknown and nonlinear feedback controller with one approximated linear controller,while guaranteeing the equivalent property for the obtained closed loop system.Based on some statistical correlation functions,one condition is derived to show the equivalent property between the approximated linear controller and the original nonlinear controller.The detailed explicit form,corresponding to the approximated linear controller,is also constructed.Furthermore,to give a complete analysis for closed loop identification,the cost function is rewritten as one extended expression,being convenient to understand.Then spectral estimation is introduced to identify the unknown plant in the closed loop system.Finally,the proposed theories are verified by one simulation example.

关 键 词：synthesis analysis closed loop system simplified function equivalent controller 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]