An adaptive control with optimal disturbances rejection  

作　　者：LI ShengPing FAN YingHui 

机构地区：[1]Department of Mechantronics Engineering,Shantou University,Shantou 515063,China

出　　处：《Science China(Information Sciences)》2012年第7期1704-1714,共11页中国科学（信息科学）（英文版）

基　　金：supported by National Natural Science Foundation of China (Grant No. 60774019, 51175315);Key Project of Natural Science Foundation of Guangdong Province(Grant No. 9251503101000004);Team Program of Natural Science Foundation of Guangdong Province (Grant No. 8351503101000001)

摘　　要：This paper provides a way to optimize the overall disturbances rejection performance of the adaptive control system in the presence of unknown external disturbances. Especially, the updatable non-empty admissi- ble model set, which is consistent to the a priori knowledge of the plant parameter and the online measurements, is computed. With the overall system performance as the criteria, the nominal model is optimally chosen within the admissible model set. The optimal nominal model is subsequently used to synthesize the optimal closed-loop controller based on the ~1 design methodology. Combining the above two aspects, an optimal adaptive control scheme is proposed. Because of the consistency of the identification criteria and control object, the adaptive control scheme proposed in this paper can achieve the overall optimal disturbances rejection performance, and the effect of the interplay between the identification and control of the adaptive system can be handled effectively. In addition, the computable optimal performance is also provided.This paper provides a way to optimize the overall disturbances rejection performance of the adaptive control system in the presence of unknown external disturbances. Especially, the updatable non-empty admissi- ble model set, which is consistent to the a priori knowledge of the plant parameter and the online measurements, is computed. With the overall system performance as the criteria, the nominal model is optimally chosen within the admissible model set. The optimal nominal model is subsequently used to synthesize the optimal closed-loop controller based on the ~1 design methodology. Combining the above two aspects, an optimal adaptive control scheme is proposed. Because of the consistency of the identification criteria and control object, the adaptive control scheme proposed in this paper can achieve the overall optimal disturbances rejection performance, and the effect of the interplay between the identification and control of the adaptive system can be handled effectively. In addition, the computable optimal performance is also provided.

关 键 词：unknown external disturbances adaptive control optimal performance 

分 类 号：TP273.2[自动化与计算机技术—检测技术与自动化装置] O231[自动化与计算机技术—控制科学与工程]