Abstract
This paper describes adaptive control of the superheat in a refrigeration system. Traditionally, the superheat is PI controlled using constant gain and integration time, which often will have a conservative tuning. On-line update of the controller parameters in self-tuning scheme by identification in open loop or by using external signals in closed loop is cumbersome. In this work a method using PI controllers with shifting parameters in a bumpless set-up has been used for finding better parameters. Each controller is used in a certain time interval and ISE (Integrated Squared Error) is calculated as a measure for the quality. This is used in a gradient method to increase the performance. The improved PI controller gives the possibility to optimise the superheat reference via an additional control loop. The controllers are designed and tested in a laboratory set-up. The performance of the shifting adaptive controller turns out to have a better performance than a fixed parameter PI controller.
Originalsprog | Engelsk |
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Titel | 2018 IEEE Conference on Control Technology and Applications (CCTA) |
Antal sider | 6 |
Forlag | IEEE |
Publikationsdato | 26 okt. 2018 |
Sider | 496-501 |
Artikelnummer | 8511512 |
ISBN (Trykt) | 978-1-5386-7699-8 |
ISBN (Elektronisk) | 978-1-5386-7698-1 |
DOI | |
Status | Udgivet - 26 okt. 2018 |
Begivenhed | 2018 IEEE Conference on Control Technology and Applications (CCTA) - The Scandic Hotel Copenhagen, Copenhagen, Danmark Varighed: 21 aug. 2018 → 24 aug. 2018 |
Konference
Konference | 2018 IEEE Conference on Control Technology and Applications (CCTA) |
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Lokation | The Scandic Hotel Copenhagen |
Land/Område | Danmark |
By | Copenhagen |
Periode | 21/08/2018 → 24/08/2018 |