反馈式权值动态分配雷达与红外传感器航迹融合方法

Dynamic Weight Assignment with Feedback for Radar and Infrared Sensor Track Fusion Method

为了有效提高雷达与红外传感器航迹融合的精确度和稳定性,提出了反馈式融合与基于局部航迹精度的权值动态分配相结合的航迹融合方法。首先,从结构和性能上对比分析了带反馈与不带反馈两种估计融合算法,指出带反馈融合的优越性,为实现反馈式融合时权值动态分配,利用新息与协方差定义了标准化精度矩阵作为点迹精确度的评价指标;然后,计算一段连续点迹标准化精度矩阵的标准差作为权值将各传感器产生的航迹进行融合运算,并将运算结果反馈到各传感器。仿真实验表明,基于局部航迹精度的反馈式权值动态分配法在雷达与红外传感器航迹融合应用中误差小、性能稳定,且受低精度传感器误差影响较小,能够在传感器精度差异较大或精度发生变化的情况下依然保持较高的精确度。

In order to effectively improve the accuracy of radar and infrared sensor track fusion,a track fusion method combining feedback fusion and dynamic weight assignment method based on local track accuracy is proposed. Firstly,two estimation fusion algorithms with feedback and without feedback are compared in terms of structure and performance. In order to realize the dynamic weight distribution,the standardized precision matrix is defined by using the new information and covariance as the evaluation index of point trace precision,and then the standard deviation of the standardized precision matrix of a continuous point trace is calculated as the weight to fuse the track generated by each sensor,and the result is fed back to each sensor. The simulation results show that the feedback dynamic weight distribution method based on local track accuracy has low error and stable performance in radar and infrared sensor track fusion applications. In addition,it is less affected by the error of low precision sensor,and it can maintain high accuracy even if the accuracy of sensor varies greatly.