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在战场上,相对于普通运动目标,微动目标的威胁性越来越大。而采用传统的激光测速系统进行微动目标检测时,系统精度低,参数估计算法复杂。为此,文章提出了一种基于分数阶傅里叶变换的激光微动目标运动参数测量方法。首先给出了激光信号的数学模型,推导了微动目标运动参数测量算法,分析了参数估计精度,最后采用Matlab对算法进行仿真。数值分析表明,此算法可以有效检测出微动目标的速度和加速度信息,具有一定的工程应用价值。
On the battlefield, fretting targets are more and more threatening than ordinary sporting targets. However, when the conventional laser speed measurement system is used to detect the fretting target, the system accuracy is low and the parameter estimation algorithm is complex. To this end, this paper presents a measurement method of moving parameters of the laser micro-moving target based on Fractional Fourier Transform. Firstly, the mathematical model of laser signal is given, the moving parameters measurement algorithm of micro-moving target is deduced, the precision of parameter estimation is analyzed, and the algorithm is simulated by Matlab. Numerical analysis shows that this algorithm can effectively detect the velocity and acceleration information of the fretting target and has certain engineering application value.