提出一种基于扩展卡尔曼滤波的DIFAR(Direction Finding and Ranging)浮标阵目标跟踪算法。首先,建立了目标与浮标的数学运动模型及坐标系,然后推导出目标状态方程及观测方程,确定了滤波初始状态值及初始协方差矩阵。仿真结果表明,以测...提出一种基于扩展卡尔曼滤波的DIFAR(Direction Finding and Ranging)浮标阵目标跟踪算法。首先,建立了目标与浮标的数学运动模型及坐标系,然后推导出目标状态方程及观测方程,确定了滤波初始状态值及初始协方差矩阵。仿真结果表明,以测量目标方位和频率作为输入信息,使用卡尔曼滤波技术,在测向方位误差均方差5°,测频误差均方差0.1 Hz情况下,成功完成了目标参数估计任务。最后针对三种典型的浮标布防阵形进行了大量仿真,分析了三种阵形的参数估计性能,讨论了三种阵形的优缺点。展开更多
In order to solve the problem of target location of single direction finding and ranging(DIFAR) sonobuoy, a new target location algorithm is proposed. Based on the new generation of high performance sonobuoy signal pr...In order to solve the problem of target location of single direction finding and ranging(DIFAR) sonobuoy, a new target location algorithm is proposed. Based on the new generation of high performance sonobuoy signal processing platform, the new algorithm makes full use of the Doppler information of the targets while using the target location data, and successfully implements the target detection, location and tracking. In the calculation of target parameters, the new algorithm utilizes the repeated measurement data to further improve the calculation accuracy of the target parameters using the principle of Least Square. The simulation results indicate the correctness of the new algorithm. The algorithm is simple, stable and easily implemented in engineering. And besides, it overcomes the weakness of the traditional algorithm which requires at least two DIFAR buoys to locate the targets.展开更多
声纳浮标是用于探测和识别水下移动目标的重要手段,被广泛应用于航空反潜领域。DIFAR(Directional Frequency Analysis and Recording)浮标就是一种典型的声纳浮标,也被称为被动定向浮标,应用于目标的初始定位。AN/SSQ-53系列声纳浮标作...声纳浮标是用于探测和识别水下移动目标的重要手段,被广泛应用于航空反潜领域。DIFAR(Directional Frequency Analysis and Recording)浮标就是一种典型的声纳浮标,也被称为被动定向浮标,应用于目标的初始定位。AN/SSQ-53系列声纳浮标作为DIFAR浮标的一种,是由三个声传感器集成的小型基阵,包括一个全向水听器和一对正交偶极子,其中全向水听器提供接收信号的全向声压信息,正交偶极子提供接收信号的方向信息,使其可以对目标进行方位估计。这三个声传感器分别构成三个相互独立的声信号通道:全向通道、正弦通道和余弦通道。论文介绍了DIFAR浮标目标方位估计的两种方法:FFT/B-Scan和FOS/B-Scan,通过仿真对比得出,在一定条件下FOS/B-Scan算法比FFT/B-Scan算法在目标方位估计方面性能更佳。展开更多
文摘提出一种基于扩展卡尔曼滤波的DIFAR(Direction Finding and Ranging)浮标阵目标跟踪算法。首先,建立了目标与浮标的数学运动模型及坐标系,然后推导出目标状态方程及观测方程,确定了滤波初始状态值及初始协方差矩阵。仿真结果表明,以测量目标方位和频率作为输入信息,使用卡尔曼滤波技术,在测向方位误差均方差5°,测频误差均方差0.1 Hz情况下,成功完成了目标参数估计任务。最后针对三种典型的浮标布防阵形进行了大量仿真,分析了三种阵形的参数估计性能,讨论了三种阵形的优缺点。
文摘In order to solve the problem of target location of single direction finding and ranging(DIFAR) sonobuoy, a new target location algorithm is proposed. Based on the new generation of high performance sonobuoy signal processing platform, the new algorithm makes full use of the Doppler information of the targets while using the target location data, and successfully implements the target detection, location and tracking. In the calculation of target parameters, the new algorithm utilizes the repeated measurement data to further improve the calculation accuracy of the target parameters using the principle of Least Square. The simulation results indicate the correctness of the new algorithm. The algorithm is simple, stable and easily implemented in engineering. And besides, it overcomes the weakness of the traditional algorithm which requires at least two DIFAR buoys to locate the targets.
文摘声纳浮标是用于探测和识别水下移动目标的重要手段,被广泛应用于航空反潜领域。DIFAR(Directional Frequency Analysis and Recording)浮标就是一种典型的声纳浮标,也被称为被动定向浮标,应用于目标的初始定位。AN/SSQ-53系列声纳浮标作为DIFAR浮标的一种,是由三个声传感器集成的小型基阵,包括一个全向水听器和一对正交偶极子,其中全向水听器提供接收信号的全向声压信息,正交偶极子提供接收信号的方向信息,使其可以对目标进行方位估计。这三个声传感器分别构成三个相互独立的声信号通道:全向通道、正弦通道和余弦通道。论文介绍了DIFAR浮标目标方位估计的两种方法:FFT/B-Scan和FOS/B-Scan,通过仿真对比得出,在一定条件下FOS/B-Scan算法比FFT/B-Scan算法在目标方位估计方面性能更佳。