提高脉冲激光引信定距精度的仿真研究

激光引信是随着激光技术的发展而出现的一种近炸引信,其定距精度的高低,直接影响系统的最终性能。提出了采用Xilinx公司的SpartanⅢ系列FPGA芯片,通过对基准时钟的相移,利用4个相位相差90°的倍频时钟的方法进行脉冲测距,从而大幅度地提高脉冲激光引信的定距精度,理论上定距误差为0.1875m,并通过Modelsim进行仿真验证。

Research and simulation of high precision pulsed laser fuze

Laser fuze is a kind of proximity fuze developed with laser technology.And its precision of ranging has a direct influence on the overall performance of the system.Spartan III series FPGA chip are employed from Xilinx company.Through phase shifting the primary reference clock and ranging with four doubled-frequency clocks with phase shiftings of 90 degree,the ranging precision can be improved obviously.The theoretical ranging error is 0.1875m and the result is proven by simulation with Modelsim.Valuable conclusions are drawn for improving the ranging precision of laser fuze.