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基于SVM的低空飞行冲突探测改进模型
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作者 王尔申 宋远上 +3 位作者 佟刚 王传云 曲萍萍 徐嵩 《北京航空航天大学学报》 EI CAS CSCD 北大核心 2022年第1期8-14,共7页
为保障通航飞行器在低空空域的飞行安全,提出了一种基于支持向量机(SVM)的飞行冲突探测改进模型。首先,建立适应于飞行器的保护区。然后,利用改进型ID3决策树算法将搜索空间降低到局部的方法筛选具有潜在飞行冲突的飞行器,并利用随机森... 为保障通航飞行器在低空空域的飞行安全,提出了一种基于支持向量机(SVM)的飞行冲突探测改进模型。首先,建立适应于飞行器的保护区。然后,利用改进型ID3决策树算法将搜索空间降低到局部的方法筛选具有潜在飞行冲突的飞行器,并利用随机森林(RF)选择合适训练集。最后,利用tanh函数优化容易饱和的sigmoid函数对SVM分类结果的概率映射。通过仿真验证和对比分析,结果表明:利用基于密度聚类的DBSACN算法去除异常点,将剔除产生误报和虚报的数据作为训练集优化SVM分类器,改进的飞行冲突探测模型的误报率和虚报率分别降低了0.6%和1.9%,算法执行效率得到提高,而且具有较好的抗干扰能力与稳定性。 展开更多
关键词 通航飞行器 低空空域 冲突探测 支持向量机(SVM) 决策树
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ADS-B Anomaly Data Detection Model Based on Deep Learning and Difference of Gaussian Approach 被引量:6
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作者 WANG Ershen SONG Yuanshang +5 位作者 XU Song GUO Jing HONG Chen QU Pingping PANG Tao ZHANG Jiantong 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2020年第4期550-561,共12页
Due to the influence of terrain structure,meteorological conditions and various factors,there are anomalous data in automatic dependent surveillance-broadcast(ADS-B)message.The ADS-B equipment can be used for position... Due to the influence of terrain structure,meteorological conditions and various factors,there are anomalous data in automatic dependent surveillance-broadcast(ADS-B)message.The ADS-B equipment can be used for positioning of general aviation aircraft.Aim to acquire the accurate position information of aircraft and detect anomaly data,the ADS-B anomaly data detection model based on deep learning and difference of Gaussian(DoG)approach is proposed.First,according to the characteristic of ADS-B data,the ADS-B position data are transformed into the coordinate system.And the origin of the coordinate system is set up as the take-off point.Then,based on the kinematic principle,the ADS-B anomaly data can be removed.Moreover,the details of the ADS-B position data can be got by the DoG approach.Finally,the long short-term memory(LSTM)neural network is used to optimize the recurrent neural network(RNN)with severe gradient reduction for processing ADS-B data.The position data of ADS-B are reconstructed by the sequence to sequence(seq2seq)model which is composed of LSTM neural network,and the reconstruction error is used to detect the anomalous data.Based on the real flight data of general aviation aircraft,the simulation results show that the anomaly data can be detected effectively by the proposed method of reconstructing ADS-B data with the seq2seq model,and its running time is reduced.Compared with the RNN,the accuracy of anomaly detection is increased by 2.7%.The performance of the proposed model is better than that of the traditional anomaly detection models. 展开更多
关键词 general aviation aircraft automatic dependent surveillance-broadcast(ADS-B) anomaly data detection deep learning difference of Gaussian(DoG) long short-term memory(LSTM)
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