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Estimation of order and delay time of the process in a closed‐loop control system
Author(s) -
Oura Kunihiko,
Akizuki Kageo,
Hanazaki Izumi
Publication year - 1997
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/(sici)1520-6416(19971115)121:2<63::aid-eej8>3.0.co;2-r
Subject(s) - identifiability , control theory (sociology) , process (computing) , closed loop , identification (biology) , smith predictor , loop (graph theory) , uniqueness , computer science , mathematics , estimation theory , order (exchange) , control (management) , algorithm , control engineering , statistics , engineering , temperature control , mathematical analysis , pid controller , botany , finance , combinatorics , artificial intelligence , economics , biology , operating system
This paper proposes a procedure for estimating the order and delay time of the process in a closed‐loop control system from its input and output data. There are identifiability conditions that assure uniqueness and unbiasedness of the estimates, but they assume that the order and delay time of the process are known. Therefore, it is of primary importance to estimate the order and delay time of the process in the identification of a closed‐loop system. In this paper, the authors first investigate the influence of the closed loop on identification, then propose a procedure for estimating the order and delay time, taking into account their consequences. © 1997 Scripta Technica, Inc. Electr Eng Jpn, 121(2): 63–71, 1997