摘要
Conventional PI control encounters some problems when dealing with large lag process in the presence of parameter uncertainties.For the typical first-order process,an observerbased linear active disturbance rejection control（LADRC） scheme is presented to cope with the difficulties,and a reduced-order observer scheme is proposed further.Some quantitative dynamic results with regard to non-overshoot characteristics are obtained.Finally,the performance boundaries of LADRC and PI control are explicitly compared with each other,which shows that the former is more superior in most cases.
Conventional PI control encounters some problems when dealing with large lag process in the presence of parameter uncertainties.For the typical first-order process,an observerbased linear active disturbance rejection control（LADRC） scheme is presented to cope with the difficulties,and a reduced-order observer scheme is proposed further.Some quantitative dynamic results with regard to non-overshoot characteristics are obtained.Finally,the performance boundaries of LADRC and PI control are explicitly compared with each other,which shows that the former is more superior in most cases.
基金
supported by the National Natural Science Foundation of China(60774088)
the National High Technology Research and Development Program of China(863 Program)(2009AA04Z132)
the Specialized Research Fund for the Doctoral Program of Higher Education of China(20090031110029)
作者简介
Corresponding author.Ruiguang Yang was born in 1965. He is a Ph.D. candidate. His research interest is advanced control applications in flight control. E-mail： yang_rui_guang@ 163.comMingwei Sun was born in 1972. He received his Ph.D. degree in control theory and control engineering from Nankai University in 2000. Now he is an associate professor and M.S. student supervisor at Nankai University. His research interest is advanced control applications in flight control. E-mail： sun_mingwei@ yahoo.com.cnZengqiang Chen was born in 1964. He received his Ph.D. degree in control theory and control engineering from Nankai University in 1997. Now he is a professor and Ph.D. student supervisor at Nankai University. His research interests include intelligent predictive control and nonlinear control. E-mail： chenzq@nankai.edu.cn
