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| Modeling and Simulation of PID Control for Refrigeration Heat Exchange System of Aircraft Liquid-cooling Carts in Different Working Conditions |
| Received:June 12, 2017 Revised:September 15, 2017 |
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| DOI：10.7643/ issn.1672-9242.2017.09.001 |
| KeyWord:aircraft liquid cooling cart refrigeration heat exchange system mathematical model PID control simulation |
| Author | Institution |
| LI Xu |
Department of Aviation Ground, Air force Logistics College, Jiangsu , China |
| LEI Jin-guo |
Department of Aviation Ground, Air force Logistics College, Jiangsu , China |
| ZHANG Yong-liang |
Department of Aviation Ground, Air force Logistics College, Jiangsu , China |
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| Abstract: |
| The present studies usually just consider one working condition to build mathematical model, which makes the model inaccurate and makes the PID control of the control system have adverse control effects. To solve the problem and enhance the control ability of the system, two different mathematic models of the refrigeration heat exchange system in refrigeration and heating working conditions were built according to the needs of the aircrafts and the working condition of the aircraft liquid-cooling carts. And a simulation research was carried out based on Simulink. Compared to the mathematical model in single refrigeration working condition, the response time of the PID control in the models in the two conditions was 2.1 min and 3.1 min respectively, which was shorter than that of the PID control in the model of single refrigeration-2.8 min, 4.5 min. And the errors of the control system were 0.75%, 0.51%, which were shorter than the errors of the PID control in the model in single refrigeration-1.5%, 0.71%. The models in the two conditions have a better PID control ability in response speed, control accuracy, and have a good prospect for industrial and military applications. |
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