Relay-based estimation of multiple points on process frequency response

Qiang Bi; Qing Guo Wang; Chang Chieh Hang

doi:10.1016/S0005-1098(97)00090-3

Relay-based estimation of multiple points on process frequency response

Qiang Bi, Qing Guo Wang, Chang Chieh Hang

National University of Singapore

Research output: Contribution to journal › Article › peer-review

43 Citations (Scopus)

Abstract

In this paper, a new technique for process frequency-response identification is proposed, which can identify multiple points on a process frequency response from a single relay feedback test. A modified relay is proposed and it can effectively excite a process not only at the process critical frequency ω_c but also at 0.5ω_c and 1.5ω_c. As a result, the process frequency responses at multiple frequencies around ω_c can be accurately estimated from one relay test using the FFT algorithm. The technique has been tested on various processes in real-time. The results show that the method is insensitive to noise and step-like load disturbance. The technique can also be easily extended to identify other frequency-response points of interest.

Original language	English
Pages (from-to)	1753-1757
Number of pages	5
Journal	Automatica
Volume	33
Issue number	9
DOIs	https://doi.org/10.1016/S0005-1098(97)00090-3
Publication status	Published - Sept 1997
Externally published	Yes

Keywords

FFT
Frequency responses
Identification
Relay feedback

ASJC Scopus subject areas

Control and Systems Engineering
Electrical and Electronic Engineering

Access to Document

10.1016/S0005-1098(97)00090-3

Cite this

@article{8404c75fe5fd48dbbad85afd128e4172,

title = "Relay-based estimation of multiple points on process frequency response",

abstract = "In this paper, a new technique for process frequency-response identification is proposed, which can identify multiple points on a process frequency response from a single relay feedback test. A modified relay is proposed and it can effectively excite a process not only at the process critical frequency ωc but also at 0.5ωc and 1.5ωc. As a result, the process frequency responses at multiple frequencies around ωc can be accurately estimated from one relay test using the FFT algorithm. The technique has been tested on various processes in real-time. The results show that the method is insensitive to noise and step-like load disturbance. The technique can also be easily extended to identify other frequency-response points of interest.",

keywords = "FFT, Frequency responses, Identification, Relay feedback",

author = "Qiang Bi and Wang, {Qing Guo} and Hang, {Chang Chieh}",

year = "1997",

month = sep,

doi = "10.1016/S0005-1098(97)00090-3",

language = "English",

volume = "33",

pages = "1753--1757",

journal = "Automatica",

issn = "0005-1098",

publisher = "Elsevier Ltd.",

number = "9",

}

TY - JOUR

T1 - Relay-based estimation of multiple points on process frequency response

AU - Bi, Qiang

AU - Wang, Qing Guo

AU - Hang, Chang Chieh

PY - 1997/9

Y1 - 1997/9

N2 - In this paper, a new technique for process frequency-response identification is proposed, which can identify multiple points on a process frequency response from a single relay feedback test. A modified relay is proposed and it can effectively excite a process not only at the process critical frequency ωc but also at 0.5ωc and 1.5ωc. As a result, the process frequency responses at multiple frequencies around ωc can be accurately estimated from one relay test using the FFT algorithm. The technique has been tested on various processes in real-time. The results show that the method is insensitive to noise and step-like load disturbance. The technique can also be easily extended to identify other frequency-response points of interest.

AB - In this paper, a new technique for process frequency-response identification is proposed, which can identify multiple points on a process frequency response from a single relay feedback test. A modified relay is proposed and it can effectively excite a process not only at the process critical frequency ωc but also at 0.5ωc and 1.5ωc. As a result, the process frequency responses at multiple frequencies around ωc can be accurately estimated from one relay test using the FFT algorithm. The technique has been tested on various processes in real-time. The results show that the method is insensitive to noise and step-like load disturbance. The technique can also be easily extended to identify other frequency-response points of interest.

KW - FFT

KW - Frequency responses

KW - Identification

KW - Relay feedback

UR - http://www.scopus.com/inward/record.url?scp=0031224112&partnerID=8YFLogxK

U2 - 10.1016/S0005-1098(97)00090-3

DO - 10.1016/S0005-1098(97)00090-3

M3 - Article

AN - SCOPUS:0031224112

SN - 0005-1098

VL - 33

SP - 1753

EP - 1757

JO - Automatica

JF - Automatica

IS - 9

ER -

Relay-based estimation of multiple points on process frequency response

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this