As an important application research topic of the intelligent aviation multi-station, collaborative detecting must overcome the problem of scouting measurement with status of 'fragmentation', and the NP-hardne...As an important application research topic of the intelligent aviation multi-station, collaborative detecting must overcome the problem of scouting measurement with status of 'fragmentation', and the NP-hardness problem of matching association between target and measurement in the process of scouting to data-link, which has complicated technical architecture of network construction. In this paper, taking advantage of cooperation mechanism on signal level in the aviation multi-station sympathetic network, a method of obtaining target time difference of arrival (TDOA) measurement using multi-station collaborative detecting based on time-frequency association is proposed. The method can not only achieve matching between target and its measurement, but also obtain TDOA measurement by further evolutionary transaction through refreshing sequential pulse time of arrival (TOA) measurement matrix for matching and correlating. Simulation results show that the accuracy of TDOA measurement has significant superiority over TOA, and detection probability of false TDOA measurement introduced by noise and fake measurement can be reduced effectively.展开更多
The amplitude of frequency spectrum can he integrated with prohabilisfic data association （PDA） to distinguish the target with clutter echoes, especially in low SNR underwater environment. A new target-tracking algo...The amplitude of frequency spectrum can he integrated with prohabilisfic data association （PDA） to distinguish the target with clutter echoes, especially in low SNR underwater environment. A new target-tracking algorithm is presented which adopts the amplitude of frequency spectrum to improve target tracking in clutter. The prohabilisfic density distribution of frequency spectrum amplitude is analyzed. By simulation, the results show that the algorithm is superior to PDA. This approach enhances stability for the association probability and increases the performance of target tracking.展开更多
经典低阶频率响应模型可快速计算各项频率指标,但由于高比例新能源系统扰动类型多样,运行方式复杂多变,难以准确获取系统参数和扰动功率大小,同时模型本身线性化会引起较大误差,导致频率预测值和实际值存在较大差异。为使频率响应模型...经典低阶频率响应模型可快速计算各项频率指标,但由于高比例新能源系统扰动类型多样,运行方式复杂多变,难以准确获取系统参数和扰动功率大小,同时模型本身线性化会引起较大误差,导致频率预测值和实际值存在较大差异。为使频率响应模型适应实际应用场景中高精度的要求,该文提出了模型-数据融合驱动的频率稳定智能增强判别方法(model-data driven intelligent enhanced method for frequency stability discrimination,MD-IEFSD),利用扰动初期频率响应数据对模型关键参数进行辨识,建立结合卷积神经网络和注意力机制的CNN-Attention频率参数预测模型,构建了融合参数预测误差和频率响应曲线预测误差的损失函数,引入了参数的敏感性和学习速率的分析,实现了频率稳定性的准确判别。最后以中国电科院万节点测试系统为算例,验证所提方法的可行性和有效性。展开更多
基金supported by the National Natural Science Foundation of China(61472443)the Basic Research Priorities Program of Shaanxi Province Natural Science Foundation of China(2013JQ8042)
文摘As an important application research topic of the intelligent aviation multi-station, collaborative detecting must overcome the problem of scouting measurement with status of 'fragmentation', and the NP-hardness problem of matching association between target and measurement in the process of scouting to data-link, which has complicated technical architecture of network construction. In this paper, taking advantage of cooperation mechanism on signal level in the aviation multi-station sympathetic network, a method of obtaining target time difference of arrival (TDOA) measurement using multi-station collaborative detecting based on time-frequency association is proposed. The method can not only achieve matching between target and its measurement, but also obtain TDOA measurement by further evolutionary transaction through refreshing sequential pulse time of arrival (TOA) measurement matrix for matching and correlating. Simulation results show that the accuracy of TDOA measurement has significant superiority over TOA, and detection probability of false TDOA measurement introduced by noise and fake measurement can be reduced effectively.
基金This project was supported by the Defense Pre-Research Project of the‘Tenth Five-Year-Plan’of China (40105010101)
文摘The amplitude of frequency spectrum can he integrated with prohabilisfic data association （PDA） to distinguish the target with clutter echoes, especially in low SNR underwater environment. A new target-tracking algorithm is presented which adopts the amplitude of frequency spectrum to improve target tracking in clutter. The prohabilisfic density distribution of frequency spectrum amplitude is analyzed. By simulation, the results show that the algorithm is superior to PDA. This approach enhances stability for the association probability and increases the performance of target tracking.
文摘经典低阶频率响应模型可快速计算各项频率指标,但由于高比例新能源系统扰动类型多样,运行方式复杂多变,难以准确获取系统参数和扰动功率大小,同时模型本身线性化会引起较大误差,导致频率预测值和实际值存在较大差异。为使频率响应模型适应实际应用场景中高精度的要求,该文提出了模型-数据融合驱动的频率稳定智能增强判别方法(model-data driven intelligent enhanced method for frequency stability discrimination,MD-IEFSD),利用扰动初期频率响应数据对模型关键参数进行辨识,建立结合卷积神经网络和注意力机制的CNN-Attention频率参数预测模型,构建了融合参数预测误差和频率响应曲线预测误差的损失函数,引入了参数的敏感性和学习速率的分析,实现了频率稳定性的准确判别。最后以中国电科院万节点测试系统为算例,验证所提方法的可行性和有效性。
