双分布孔径红外系统的协同定位与精度分析

针对城市防空背景下利用两个分布孔径红外系统(DAIRS)对目标进行测距的问题,从目标成像的角度,构建了双DAIRS协同定位模型,推导了定位误差公式。误差分析除了考虑目标投影点的测量误差外,还增加了红外告警单元标定不准确等原因造成的系统误差。当目标在不同传感器上依次成像时,通过对定位误差延续性的分析表明在忽略视场限制的情况下,可以用其中的一个配对组来对处于不同视场交叠区的目标进行误差分析。最后,仿真分析了影响目标定位的主要因素,结果表明:减少组成DAIRS传感器数目对定位精度影响较少,该方面可以在一定程度上降低系统的高成本,另外当两个DAIRS之间的距离增加1/3时,定位误差可以降低一半。

Cooperative location and accuracy analysis of dual distributed aperture infrared system

A new algorithm model for target location is proposed to increase the detecting capability of dual distributed aperture infrared system(DAIRS)on urban air defense system,and a location error formula was derived.In the process of error analysis,the system errors introduced by various causes,such as the wrong calibration of the infrared warning units,were also taken into account except for the measurement errors of the projection point.Then the continuity of location error was analyzed when the target was imaged in different sensors,which shows that the target location precision can be analyzed only using a pair of sensors when ignoring the limit of the field of view.Finally,simulation and analysis of influence factors were made.The results show that the decrease of sensors has small impact on the location accuracy,which can reduce system cost,and when the distance between two DAIRS increase by 1 / 3,the location error can reduce by half.