Model-Based Observer Design Considering Unequal Measurement Delays

State observers are essential components of a modern control system. It is often designed based on a mathematical model of the process, thus requiring detailed process knowledge. However, in the existing state estimation methods, equal delays are commonly assumed for all communication lines, which i...

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Autores principales:	Yousef Alipouri, Lexuan Zhong
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	model based observer chain observer measurement delays continuous stirred tank heater state estimation Materials of engineering and construction. Mechanics of materials TA401-492 Production of electric energy or power. Powerplants. Central stations TK1001-1841
Acceso en línea:	https://doaj.org/article/9fc3f5bda30a44d988b42b282f4fa9cc
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id	oai:doaj.org-article:9fc3f5bda30a44d988b42b282f4fa9cc
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spelling	oai:doaj.org-article:9fc3f5bda30a44d988b42b282f4fa9cc2021-11-25T15:56:46ZModel-Based Observer Design Considering Unequal Measurement Delays10.3390/act101102812076-0825https://doaj.org/article/9fc3f5bda30a44d988b42b282f4fa9cc2021-10-01T00:00:00Zhttps://www.mdpi.com/2076-0825/10/11/281https://doaj.org/toc/2076-0825State observers are essential components of a modern control system. It is often designed based on a mathematical model of the process, thus requiring detailed process knowledge. However, in the existing state estimation methods, equal delays are commonly assumed for all communication lines, which is unrealistic and poses problems such as instability and a degraded performance of observers when unequal time delays exist. In this paper, a design of observers considering the measurement delays is presented. To deal with this problem, a chain-based observer has been proposed in which each chain deals with one output delay, performs prediction for the unavailable output value, and passes it to the next chain. Convergence of each chain observer as well as overall state estimation were proven. To illustrate the performance of the proposed scheme, simulation studies were performed on a benchmark continuous stirred tank heater (CSTH) process.Yousef AlipouriLexuan ZhongMDPI AGarticlemodel based observerchain observermeasurement delayscontinuous stirred tank heaterstate estimationMaterials of engineering and construction. Mechanics of materialsTA401-492Production of electric energy or power. Powerplants. Central stationsTK1001-1841ENActuators, Vol 10, Iss 281, p 281 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	model based observer chain observer measurement delays continuous stirred tank heater state estimation Materials of engineering and construction. Mechanics of materials TA401-492 Production of electric energy or power. Powerplants. Central stations TK1001-1841
spellingShingle	model based observer chain observer measurement delays continuous stirred tank heater state estimation Materials of engineering and construction. Mechanics of materials TA401-492 Production of electric energy or power. Powerplants. Central stations TK1001-1841 Yousef Alipouri Lexuan Zhong Model-Based Observer Design Considering Unequal Measurement Delays
description	State observers are essential components of a modern control system. It is often designed based on a mathematical model of the process, thus requiring detailed process knowledge. However, in the existing state estimation methods, equal delays are commonly assumed for all communication lines, which is unrealistic and poses problems such as instability and a degraded performance of observers when unequal time delays exist. In this paper, a design of observers considering the measurement delays is presented. To deal with this problem, a chain-based observer has been proposed in which each chain deals with one output delay, performs prediction for the unavailable output value, and passes it to the next chain. Convergence of each chain observer as well as overall state estimation were proven. To illustrate the performance of the proposed scheme, simulation studies were performed on a benchmark continuous stirred tank heater (CSTH) process.
format	article
author	Yousef Alipouri Lexuan Zhong
author_facet	Yousef Alipouri Lexuan Zhong
author_sort	Yousef Alipouri
title	Model-Based Observer Design Considering Unequal Measurement Delays
title_short	Model-Based Observer Design Considering Unequal Measurement Delays
title_full	Model-Based Observer Design Considering Unequal Measurement Delays
title_fullStr	Model-Based Observer Design Considering Unequal Measurement Delays
title_full_unstemmed	Model-Based Observer Design Considering Unequal Measurement Delays
title_sort	model-based observer design considering unequal measurement delays
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9fc3f5bda30a44d988b42b282f4fa9cc
work_keys_str_mv	AT yousefalipouri modelbasedobserverdesignconsideringunequalmeasurementdelays AT lexuanzhong modelbasedobserverdesignconsideringunequalmeasurementdelays
_version_	1718413396018200576

Model-Based Observer Design Considering Unequal Measurement Delays

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