Real-time QFT Control for Temperature in Greenhouses
Sudden changes in a greenhouse environment negatively impact the development and production of crops, especially in greenhouses with natural ventilation when temperatures are low at night and change rapidly due to wet winds. To mitigate these variations, a design of a robust controller based on Quan...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Universidad de las Fuerzas Armadas ESPE
2019-05-01
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| Series: | Maskay |
| Subjects: | |
| Online Access: | https://journal.espe.edu.ec/ojs/index.php/maskay/article/view/1162 |
| _version_ | 1819071110937837568 |
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| author | Rafael Augusto Núñez Rodríguez Carlos L. Corzo R. |
| author_facet | Rafael Augusto Núñez Rodríguez Carlos L. Corzo R. |
| author_sort | Rafael Augusto Núñez Rodríguez |
| collection | DOAJ |
| description | Sudden changes in a greenhouse environment negatively impact the development and production of crops, especially in greenhouses with natural ventilation when temperatures are low at night and change rapidly due to wet winds. To mitigate these variations, a design of a robust controller based on Quantitative Feedback Theory (QFT) as from a Smith predictor structure for the dead-time system is proposed. This structure offers high stability based on the gain margin, the phase margin, and the rejection of disturbances in the system output. This design was contrasted with a PID controller based on performance indices, according to the transient response and error in the presence of changes in the point of operation and charge disturbances. Final results showed that the dynamic response of the QFT controller improved compared to PID controller results. |
| first_indexed | 2024-12-21T17:16:38Z |
| format | Article |
| id | doaj.art-f2675266e9a746ec92e358e0832c12d0 |
| institution | Directory Open Access Journal |
| issn | 1390-6712 |
| language | English |
| last_indexed | 2024-12-21T17:16:38Z |
| publishDate | 2019-05-01 |
| publisher | Universidad de las Fuerzas Armadas ESPE |
| record_format | Article |
| series | Maskay |
| spelling | doaj.art-f2675266e9a746ec92e358e0832c12d02022-12-21T18:56:16ZengUniversidad de las Fuerzas Armadas ESPEMaskay1390-67122019-05-0192586210.24133/maskay.v9i2.1162746Real-time QFT Control for Temperature in GreenhousesRafael Augusto Núñez Rodríguez0Carlos L. Corzo R.1Unidades Tecnológicas de SantanderUnidades Tecnológicas de SantanderSudden changes in a greenhouse environment negatively impact the development and production of crops, especially in greenhouses with natural ventilation when temperatures are low at night and change rapidly due to wet winds. To mitigate these variations, a design of a robust controller based on Quantitative Feedback Theory (QFT) as from a Smith predictor structure for the dead-time system is proposed. This structure offers high stability based on the gain margin, the phase margin, and the rejection of disturbances in the system output. This design was contrasted with a PID controller based on performance indices, according to the transient response and error in the presence of changes in the point of operation and charge disturbances. Final results showed that the dynamic response of the QFT controller improved compared to PID controller results.https://journal.espe.edu.ec/ojs/index.php/maskay/article/view/1162QFT controllerRobust ControlTemperature ControlSmith predictor |
| spellingShingle | Rafael Augusto Núñez Rodríguez Carlos L. Corzo R. Real-time QFT Control for Temperature in Greenhouses Maskay QFT controller Robust Control Temperature Control Smith predictor |
| title | Real-time QFT Control for Temperature in Greenhouses |
| title_full | Real-time QFT Control for Temperature in Greenhouses |
| title_fullStr | Real-time QFT Control for Temperature in Greenhouses |
| title_full_unstemmed | Real-time QFT Control for Temperature in Greenhouses |
| title_short | Real-time QFT Control for Temperature in Greenhouses |
| title_sort | real time qft control for temperature in greenhouses |
| topic | QFT controller Robust Control Temperature Control Smith predictor |
| url | https://journal.espe.edu.ec/ojs/index.php/maskay/article/view/1162 |
| work_keys_str_mv | AT rafaelaugustonunezrodriguez realtimeqftcontrolfortemperatureingreenhouses AT carloslcorzor realtimeqftcontrolfortemperatureingreenhouses |