ISSN:1049-8923    

DOI:10.1002/rnc.4590050702

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1995

数据来源: WILEY

摘要:

AbstractIn order to recovery robust stability of a desirable state feedback system by output feedback, the desirable complementary function is approximated by a modified complementary function of the output feedback system by solving an ℋ︁∞norm‐minimization problem. The modified complementary function is obtained by getting rid of non‐minimum phase factors from the complementary function. Numerical examples show the superiority of this method to LQG/LTR method and othe

ISSN:1049-8923    

DOI:10.1002/rnc.4590050703

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1995

数据来源: WILEY

摘要:

AbstractThis paper presents a new approach to the loop transfer recovery (LTR) in linear multivariable control systems, based on the unknown input reduced‐order observer‐based controller. Two parametrization methods for all unknown input observers are presented; the first one is based on the matrix fraction description (MFD) and the second one is developed in ℋ︁ℋ︁∞. The LTR for both minimum and non‐minimum phase systems are considered. An exact recovery, based on the unknown input observer, is provided for minimum phase systems. For non‐minimum phase systems, an approximate recovery is obtained by minimizing the ℋ︁∞norm

ISSN:1049-8923    

DOI:10.1002/rnc.4590050704

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1995

数据来源: WILEY

摘要:

AbstractTwo new controller structures, namely the continuous‐time current‐type observer and current‐type CSS (Chen‐Saberi‐Sannuti) architecture‐based controllers, are considered in this paper for loop transfer recovery design for general non‐strictly proper non‐minimum phase systems. The proposed observer is structurally analogous to the current estimator of discrete‐time systems, while the proposed CSS architecture falls into the category of the controller structures developed recently by Chen, Saberi and Sannuti. The properties of these new structures are characterized. In particular, sets of necessary and sufficient conditions under which a target loop transfer function can be either exactly and/or asymptotically recovered by the abovementioned controllers are obtained. More importantly, the new current‐type observer balances the observer structures for continuous‐time and discret

ISSN:1049-8923    

DOI:10.1002/rnc.4590050705

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1995

数据来源: WILEY

摘要:

AbstractThis paper applies the proportional‐integral (PI) observer in connection with loop transfer recovery (LTR) design for continuous‐time systems. We show that a PI observer makes it possible to obtain time recovery, i.e., exact recovery fort→∞, under mild conditions. Based on an extension of the LQG/LTR method of proportional (P) observers, a systematic LTR design method is derived for the PI observer. Our recovery design method allows time recovery and frequency (normal) recovery to be done independently. Furthermore, we give explicit expressions for the recovery error when asymptotic recovery cannot be obtained. A design example demonstrates the advantages of time recovery in the non‐minimum p

ISSN:1049-8923    

DOI:10.1002/rnc.4590050706

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1995

数据来源: WILEY

ISSN:1049-8923    

DOI:10.1002/rnc.4590050707

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1995

数据来源: WILEY

ISSN:1049-8923    

DOI:10.1002/rnc.4590050701

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1995

数据来源: WILEY