| 引用本文: | 于昕迪，汪玲，朱岱寅，钱君， 李勇. 基于垂直载荷因子的湍流检测方法实现[J]. 雷达科学与技术, 2021, 19(2): 156-162.[点击复制] |
| YU Xindi, WANG Ling, ZHU Daiyin, QIAN Jun,LI Yong. Implementation of a Turbulence Detection Method Exploiting Vertical Load Factor[J]. Radar Science and Technology, 2021, 19(2): 156-162.[点击复制] |
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| 摘要: |
| 湍流是威胁航空安全的重大隐患。美国航空无线电技术委员会新修订的机载气象雷达最低性能标准 DO-220A 要求湍流检测时考虑飞机特性的影响。因此，本文以垂直载荷因子为检测依据，验证分析湍流检测方法，这对机载气象雷达准确探测湍流有实际意义。首先，构建湍流模型并量化飞机特性的影响，然后结合湍流谱宽，求解飞机垂直载荷因子。其次，依据贝叶斯准则，确定基于统计特性的最佳湍流检测门限。最后,利用遭遇湍流飞机的实际ADS-B (automatic dependent surveillance-broadcast，广播式自动相关监视)数据估算垂直载荷因子。估算结果表明,飞机遭遇湍流时的垂直载荷因子大于检测门限，需进行告警处理，与实际情况相符，验证了该方法检测湍流的合理性。 |
| 关键词: 机载气象雷达 湍流检测 垂直载荷因子 广播式自动相关监视 |
| DOI：DOI:10.3969/j.issn.1672-2337.2021.02.006 |
| 分类号:TN959.4 |
| 基金项目:工信部民机专项(No.MJ-2018-S-28) |
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| Implementation of a Turbulence Detection Method Exploiting Vertical Load Factor |
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YU Xindi, WANG Ling, ZHU Daiyin, QIAN Jun,LI Yong
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1. Key Laboratory of Radar Imaging and Microwave Photonics, Ministry of Education, College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China;2. AVIC Leihua Electronic Technology Research Institute，Wuxi 214063， China
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| Abstract: |
| Turbulence has been identified as a significant hazard for aviation safety. DO-220A, the minimum performance standard for airborne weather radar, has been recently updated by the U.S. aeronautics radio technical commission, which requires that the characteristics of aircraft should be taken into account in the turbulence detection. Thus, in this paper, a turbulence detection method is studied in which the vertical load factor is incorporated into the detection procedure. This is of practical significance for accurate turbulence of airborne weather radar. Firstly, the turbulence model is constructed and the impacts of the characteristics of aircraft are quantified. Then, the vertical load factor is computed using the spectrum width of turbulence and the characteristics of aircraft. Afterwards, according to the Bayesian criteria, an optimal statistics based on threshold of turbulence detection is determined. At last, the real ADS-B (automatic dependent surveillance-broadcast) data of an aircraft that encountered turbulence is used to estimate the vertical load factor. The estimation results show that the vertical load factor is larger than the detection threshold when the aircraft encounters a turbulence and hence it is necessary to execute an alarming processing. This is consistent with the real situation, which verifies the effectiveness of the presented turbulence detection method. |
| Key words: airborne weather radar turbulence detection vertical load factor automatic dependent surveillance-broadcast |
