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| RuichunTANG,XianminL¨U,YiliZHAI,CunqunGONG |
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| (College of Information Science and Engineering, Ocean University of China, Qingdao Shandong 266100, China;Qing Dao Haier Electronic Ltd., Qingdao Shandong 266101, China;Hisense TransTech Co., Ltd., Qingdao Shandong 266101, China) |
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| Received:March 10, 2008Revised:June 19, 2009 |
| 基金项目:This work was supported by the National Natural Science Foundation of China (No.60574023) and the Natural Science Foundation of Shandong Province (No.Z2005G01). |
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| Optimal tracking control for nonlinear large-scale systems with persistent disturbances |
| Ruichun TANG,Xianmin L¨U,Yili ZHAI,Cunqun GONG |
| (College of Information Science and Engineering, Ocean University of China, Qingdao Shandong 266100, China;Qing Dao Haier Electronic Ltd., Qingdao Shandong 266101, China;Hisense TransTech Co., Ltd., Qingdao Shandong 266101, China) |
| Abstract: |
| This paper studies the optimal control with zero steady-state error problem for nonlinear large-scale systems affected by external persistent disturbances. The nonlinear large-scale system is transformed into N nonlinear subsystems with interconnect terms. Based on the internal model principle, a disturbance compensator is constructed such that the ith subsystem with external persistent disturbances is transformed into an augmented subsystem without disturbances. According to the sensitivity approach, the optimal tracking control law for the ith nonlinear subsystem can be obtained. The optimal tracking control law for the nonlinear large-scale systems can be obtained. A numerical simulation shows that the method is effective. |
| Key words: Nonlinear systems Large-scale systems Persistent disturbances Optimal tracking control Sensitivity approach |
