The Dynamic Prediction Method for Aircraft Cabin Temperatures Based on Flight Test Data
For advanced aircraft, the temperature environment inside the cabin is very severe due to the high flight speed and the compact concentration of the electronic equipment in the cabin. Accurately predicting the temperature environment induced inside the cabin during the flight of the aircraft can det...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-09-01
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| Series: | Aerospace |
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| Online Access: | https://www.mdpi.com/2226-4310/11/9/755 |
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| author | He Li Jianjun Zhang Liangxu Cai Minwei Li Yun Fu Yujun Hao |
| author_facet | He Li Jianjun Zhang Liangxu Cai Minwei Li Yun Fu Yujun Hao |
| author_sort | He Li |
| collection | DOAJ |
| description | For advanced aircraft, the temperature environment inside the cabin is very severe due to the high flight speed and the compact concentration of the electronic equipment in the cabin. Accurately predicting the temperature environment induced inside the cabin during the flight of the aircraft can determine the temperature environment requirements of the onboard equipment inside the cabin and provide an accurate input for the thermal design optimization and test verification of the equipment. The temperature environment of the whole aircraft is divided into zones by the cluster analysis method; the heat transfer mechanism of the aircraft cabin is analyzed for the target area; and the influence of internal and external factors on the thermal environment is considered to establish the temperature environment prediction model of the target cabin. The coefficients of the equations in the model are parameterized to extract the long-term stable terms and trend change terms; with the help of the measured data of the flight state, the model coefficients are determined by a stepwise regression method; and the temperature value inside the aircraft cabin is the output by inputting parameters such as flight altitude, flight speed, and external temperature. The model validation results show that the established temperature environment prediction model can accurately predict the change curve of the cabin temperature during the flight of the aircraft, and the model has a good follow-up performance, which reduces the prediction error caused by the temperature hysteresis effect. For an aircraft, the estimated error is 2.8 °C at a confidence level of 95%. Engineering cases show that the application of this method can increase the thermal design requirements of the airborne equipment by 15 °C, increase the low-temperature test conditions by 17 °C, and avoid the problems caused by an insufficient design and over-testing. This method can accurately predict the internal temperature distribution of the cabin during the flight state of the aircraft, help designers determine the thermal design requirements of the airborne equipment, modify the thermal design and temperature test profile, and improve the environmental worth of the equipment. |
| format | Article |
| id | doaj-art-0bd6056654624306bcb1658ffaedd87c |
| institution | OA Journals |
| issn | 2226-4310 |
| language | English |
| publishDate | 2024-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Aerospace |
| spelling | doaj-art-0bd6056654624306bcb1658ffaedd87c2025-08-20T01:56:06ZengMDPI AGAerospace2226-43102024-09-0111975510.3390/aerospace11090755The Dynamic Prediction Method for Aircraft Cabin Temperatures Based on Flight Test DataHe Li0Jianjun Zhang1Liangxu Cai2Minwei Li3Yun Fu4Yujun Hao5China Aero-Polytechnology Establishment, Beijing 100028, ChinaChina Aero-Polytechnology Establishment, Beijing 100028, ChinaChina Aero-Polytechnology Establishment, Beijing 100028, ChinaChina Aero-Polytechnology Establishment, Beijing 100028, ChinaChina Aero-Polytechnology Establishment, Beijing 100028, ChinaChina Aero-Polytechnology Establishment, Beijing 100028, ChinaFor advanced aircraft, the temperature environment inside the cabin is very severe due to the high flight speed and the compact concentration of the electronic equipment in the cabin. Accurately predicting the temperature environment induced inside the cabin during the flight of the aircraft can determine the temperature environment requirements of the onboard equipment inside the cabin and provide an accurate input for the thermal design optimization and test verification of the equipment. The temperature environment of the whole aircraft is divided into zones by the cluster analysis method; the heat transfer mechanism of the aircraft cabin is analyzed for the target area; and the influence of internal and external factors on the thermal environment is considered to establish the temperature environment prediction model of the target cabin. The coefficients of the equations in the model are parameterized to extract the long-term stable terms and trend change terms; with the help of the measured data of the flight state, the model coefficients are determined by a stepwise regression method; and the temperature value inside the aircraft cabin is the output by inputting parameters such as flight altitude, flight speed, and external temperature. The model validation results show that the established temperature environment prediction model can accurately predict the change curve of the cabin temperature during the flight of the aircraft, and the model has a good follow-up performance, which reduces the prediction error caused by the temperature hysteresis effect. For an aircraft, the estimated error is 2.8 °C at a confidence level of 95%. Engineering cases show that the application of this method can increase the thermal design requirements of the airborne equipment by 15 °C, increase the low-temperature test conditions by 17 °C, and avoid the problems caused by an insufficient design and over-testing. This method can accurately predict the internal temperature distribution of the cabin during the flight state of the aircraft, help designers determine the thermal design requirements of the airborne equipment, modify the thermal design and temperature test profile, and improve the environmental worth of the equipment.https://www.mdpi.com/2226-4310/11/9/755aircraftflight testtemperature environmentpredictiontest dataheat transfer analysis |
| spellingShingle | He Li Jianjun Zhang Liangxu Cai Minwei Li Yun Fu Yujun Hao The Dynamic Prediction Method for Aircraft Cabin Temperatures Based on Flight Test Data Aerospace aircraft flight test temperature environment prediction test data heat transfer analysis |
| title | The Dynamic Prediction Method for Aircraft Cabin Temperatures Based on Flight Test Data |
| title_full | The Dynamic Prediction Method for Aircraft Cabin Temperatures Based on Flight Test Data |
| title_fullStr | The Dynamic Prediction Method for Aircraft Cabin Temperatures Based on Flight Test Data |
| title_full_unstemmed | The Dynamic Prediction Method for Aircraft Cabin Temperatures Based on Flight Test Data |
| title_short | The Dynamic Prediction Method for Aircraft Cabin Temperatures Based on Flight Test Data |
| title_sort | dynamic prediction method for aircraft cabin temperatures based on flight test data |
| topic | aircraft flight test temperature environment prediction test data heat transfer analysis |
| url | https://www.mdpi.com/2226-4310/11/9/755 |
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