A SIMPLE SUBSPACE IDENTIFICATION METHOD OF CLOSED-LOOP SYSTEMS USING ORTHOGONAL DECOMPOSITION
نویسندگان
چکیده
منابع مشابه
A Simple Subspace Identification Method of Closed-loop Systems Using Orthogonal Decomposition
A simple method of identifying plant and controller operating in closed-loop is developed by the orthogonal decomposition technique. Under the assumption that the system is open-loop as well as closed-loop stable, a subspace identification algorithm of identifying the deterministic part is derived based on two successive LQ decompositions. The idea is somewhat related to the two-stage method (V...
متن کاملClosed-loop Subspace Identification: an Orthogonal Projection Approach
In this paper, a closed-loop subspace identification approach through an orthogonal projection and subsequent singular value decomposition is proposed. As a by-product of this development, it explains why some existing subspace methods may deliver a bias in the presence of the feedback control and suggests a remedy to eliminate the bias. Furthermore, as the proposed method is a projection based...
متن کاملSubspace Identification using Closed-Loop Data
The purpose of this thesis was to investigate how different subspace identification methods cope with closed loop data, and how the controller parameters affect the quality of the acquired models. Three different subspace methods were subject for investigation; the MOESPmethod, theN4SIDmethod and theDSR_emethod. It is shown through a simulation example that all three subspace methods will ident...
متن کاملA New Subspace Identification Method for Closed-Loop Systems Using Measurable Disturbance
In this paper, we consider a closed-loop subspace identification problem without using probing inputs; but we assume that there is a measurable disturbance which can be used as a test input for identification. Deterministic and stochastic subsystems are derived by applying the orthogonal decomposition (ORT) of the joint input-output process and realization methods. We develop a new ORTbased clo...
متن کاملSubspace-based optimal IV method for closed-loop system identification
This paper deals with an optimal instrumental variable method dedicated to subspace-based closed-loop system identification. The presented solution is based on the MOESP technique but requires to modify the original scheme by proposing a new PO MOESP method which uses reconstructed past input and past output data as instrumental variables. The developed approach is then illustrated via a simula...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IFAC Proceedings Volumes
سال: 2005
ISSN: 1474-6670
DOI: 10.3182/20050703-6-cz-1902.00086