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The design of decentralised controllers for large scale systems
Bibliography:leaves 203-205.
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| Format: | Thesis |
| Language: | English |
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Department of Electrical Engineering
2014
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| _version_ | 1867614299273297920 |
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| access_status_str | Open Access |
| author | Gear, A B J |
| author2 | Braae, Martin |
| author_browse | Braae, Martin Gear, A B J |
| author_facet | Braae, Martin Gear, A B J |
| author_sort | Gear, A B J |
| collection | Thesis |
| description | Bibliography:leaves 203-205. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/8328 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:49:50.170Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Department of Electrical Engineering |
| publisherStr | Department of Electrical Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/8328 The design of decentralised controllers for large scale systems Gear, A B J Braae, Martin Electrical and Electronic Engineering Bibliography:leaves 203-205. Decentralised control schemes are becoming more common in industry as the advantages of decentralised control become more apparent. These advantages include fewer tuning parameters than centralised controllers, the simplification and cost reduction of hardware requirements and greater reliability. In addition the application of decentralised controller design to large scale systems allows established CAD methods to be implemented easily and efficiently. When the control engineer designs a distributed controller the system is divided up into a number of subsystems and a controller designed for each subsystem. The controllers are designed independently for each subsystem ignoring any interaction that may occur between the different subsystems. In terms of the input-output representation of the system this means that the matrix representing the controller will be in a block diagonal form. In general the interactions between the different subsystems will not be negligible. In some cases the interactions will be such that stabilising the individual subsystems will not be sufficient to stabilise the system as a whole. Stability theorems are required to enable the designer to check if the decentralised controller that he has designed will in fact stabilise the system as a whole. Such stability theorems have been devised although at present they are too conservative. However even with such theorems available the designer must still select the subsystems to be controlled in such a way as to satisfy the conditions laid down for stability. The stability theories usually are based on a particular matrix structure. If the matrix representing the system possesses a structure detailed by the stability theorem in question then, subject to various conditions, the system as a whole will be stable under decentralised control. In this thesis a number of different matrix structures are considered that give information as to the stability of the closed loop system. Methods are developed that allow the designer to rearrange the matrix in such a way as to obtain a particular structure, if this is possible. 2014-10-11T12:05:42Z 2014-10-11T12:05:42Z 1988 Master Thesis Masters MSc http://hdl.handle.net/11427/8328 eng application/pdf Department of Electrical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Electrical and Electronic Engineering Gear, A B J The design of decentralised controllers for large scale systems |
| thesis_degree_str | Master's |
| title | The design of decentralised controllers for large scale systems |
| title_full | The design of decentralised controllers for large scale systems |
| title_fullStr | The design of decentralised controllers for large scale systems |
| title_full_unstemmed | The design of decentralised controllers for large scale systems |
| title_short | The design of decentralised controllers for large scale systems |
| title_sort | design of decentralised controllers for large scale systems |
| topic | Electrical and Electronic Engineering |
| url | http://hdl.handle.net/11427/8328 |
| work_keys_str_mv | AT gearabj thedesignofdecentralisedcontrollersforlargescalesystems AT gearabj designofdecentralisedcontrollersforlargescalesystems |