TY - JOUR
T1 - On indirect identification of feedback control systems via the instrumental variables methods
AU - Zheng, Wei Xing
PY - 2003
Y1 - 2003
N2 - Indirect closed-loop identification assumes the knowledge of the controller. In this brief, the constrained version of the instrumental variable (IV) methods is developed. It is based on using the known controller parameters to impose linear constraints upon the closed-loop system parameters and then solving the constrained estimation problem by the Lagrange method. The developed constrained IV methods outperform the unconstrained counterparts in such aspects as insensitivity to common factors, estimation accuracy and robustness against noise. Computer simulations are presented which not only support the theoretical analysis, but also give good insight into the properties of the developed constrained IV methods.
AB - Indirect closed-loop identification assumes the knowledge of the controller. In this brief, the constrained version of the instrumental variable (IV) methods is developed. It is based on using the known controller parameters to impose linear constraints upon the closed-loop system parameters and then solving the constrained estimation problem by the Lagrange method. The developed constrained IV methods outperform the unconstrained counterparts in such aspects as insensitivity to common factors, estimation accuracy and robustness against noise. Computer simulations are presented which not only support the theoretical analysis, but also give good insight into the properties of the developed constrained IV methods.
KW - constrained optimization
KW - feedback control systems
KW - parameter estimation
UR - http://hdl.handle.net/1959.7/uws:4703
U2 - 10.1109/TCSI.2003.816326
DO - 10.1109/TCSI.2003.816326
M3 - Article
SN - 1549-8328
JO - IEEE Transactions on Circuits and Systems I: Regular Papers
JF - IEEE Transactions on Circuits and Systems I: Regular Papers
ER -