基于北斗短报文通信和落点预测方法的信标机设计

摘要

A beacon that indicates the location coordinates of aerocraft is designed,aiming at the problem of low efficiency of recovery of the aerocraft after flight test.This beacon is composed of positioning module,short message transmission module,power supply module and information processing module.It can constantly obtain the real-time location information in falling process,calculate coordinates of the predicted landing point by the mathematical method.With the short message communication function of Beidou satellite navigation and position system,the predicted coordinates of the falling point will be sent back to the ground.The beacon will send real-time location information of the point of fall at a certain frequency if it works normally after landing.On this basis,a beacon is fabricated and multiple simulation experiments are carried out for verification.The test results show that the coordinate error between estimated value and actual value is within ±20 meters in the direction of latitude and longitude and within ±5 meters in the elevation direction.Searchers can find the target device quickly and the efficiency of recovery is improved.%针对飞行器在飞行试验后回收效率低的问题,设计一种指示飞行器落点坐标的信标机.该型信标机由定位模块、短报文发送模块、电源模块、信息处理模块等组成.其可在下落过程中不断获取实时定位信息,通过数学方法计算预测落点的坐标;再利用北斗系统的短报文通信功能将预测的落点坐标发送回地面,落地后如果信标机能正常工作,则会按照一定频度持续发送实时落点信息.依照上述理论制作信标机并通过多次模拟实验进行验证.结果表明:获取到的预测坐标与实际落点坐标在经、纬度方向上的误差在±20 m以内,海拔高度方向上的误差在±5 m以内,搜索人员可以很快地找到目标设备,提高回收效率.