基于GPS的定高引信系统设计

云爆弹是内装高能燃料的高效毁伤弹药,需在特定的高度引爆,才能发挥最大杀伤效能,为此提出了一种适用于低速投放高着速的云爆弹定高引信;该引信系统以FPGA作为主控制器,通过判定GPS提供的高度信息,控制配电器使弹丸在特定高度执行相应的动作,并通过无线传输模块与外部进行通信,接收配置命令或将定高过程产生的数据发送给上位机;针对GPS定位数据更新速率低导致弹丸实际动作高度与目标高度相差大的问题,特提出了一种高度补偿算法,该算法通过在GPS连续两次测定的高度之间插入10个高度判定点,在提高高度信息采样率的同时提升了定高精度;最后用卫星导航信号模拟器对该系统进行了试验测试,结果表明该引信系统定高精度误差不超过1%,系统功耗约为1.5 W,满足实际应用需求。

Design of the GPS-based height determination Fuze System

Fuel Air Explosive are highly efficient destruction munitions with high energy fuel inside. They need to be detonated at a specific height to maximize their killing effectiveness. Therefore, a fixed-height fuze for cloud blast bombs with low-speed delivery and high velocity is proposed. The fuze system uses FPGA as the main controller. By judging the height information provided by GPS, the fuze system controls the distributor to make the projectile perform the corresponding action at a specific height, and communicates with the outside through the wireless transmission module to receive the configuration command, or sends the data generated in the process of height setting to the host computer. In order to solve the problem that the low update rate of GPS positioning data results in a large difference between the actual height of the projectile and the target height, a height compensation algorithm is designed. By inserting 10 height determination points between the two successive GPS altitudes, the algorithm improves the sampling rate of altitude information and the accuracy of altitude determination. Finally, the system was tested with a satellite navigation signal simulator, and the results showed that the fusing system has a high accuracy error of no more than 1%, and the power consumption of the system is about 1.5W, which meets the practical application requirements.