红外探测与追踪的双机被动定位模型

Two-fighter Passive Location Model for Infrared Search and Track

针对机载红外探测与追踪(IRST)被动定位的精度低和解算速度慢及多机间信息大容量实时传输问题,提出了两种应用激光数据链传输信息的IRST双机被动定位模型。模型均基于测向交叉定位原理构建,模型一的基线距离已知,两机坐标未知;模型二的两机坐标已知,基线距离未知;并对比了两种模型的特性。仿真表明,测角误差减小,两机距离增大,会提高定位精度;模型二的计算速度优于模型一,但目标高度大于1km时,模型二失效;双机与目标构成等腰三角形且两载机的交角为110°时,定位的精度最高。

For the problem of low accuracy,settlement calculation speed and large capacity information real-time transmission of airborne infrared search and track（IRST）among multiple machine problem,two application laser data link transmission information of IRST passive positioning of two models were put forward.The models were built on the basis of the principle of direction of arrival location,a baseline distance was known and aircraft coordinates unknown.Simulation results showed that the measuring angle error was reduced,the positioning accuracy was improved when the two machine distance increased;the computing speed of model two was better than model one,but,when the target height was greater than 1km,model two failed;when two aircrafts and target forming a isosceles triangle and the two aircraft crossing angle was 110°,the highest accuracy was gained.