基于多普勒频差曲线特征识别的炸点控制方法

Detonating Control Based on Characteristics of Doppler Frequency Difference Curve

针对短时傅里叶变换在分析对空无线电引信目标多普勒信号频谱特征时频率分辨率不足的问题,提出基于多普勒频差曲线特征识别的炸点控制方法。该方法对多普勒信号进行短时傅里叶变换与离散时间傅里叶变换结合的时频分析,提取出多普勒频差曲线,并识别出曲线跳变点作为特征信号进行炸点精确控制。实测信号的仿真表明,该算法比短时傅里叶变换算法提取的频率更加精确,反应出更丰富的弹目交会信息,可有效提高引信精确炸点控制性能,有一定实用价值。

For the problem of short-time Fourier transform that frequency resolution is insufficient when analyzing the spectrum characteristics of Doppler signal of anti-aircraft radio fuze target, a detonating control method based on Doppler frequency difference curve characteristics identification was proposed. By means of Time-Frequency Analysis based on short-time Fourier transform and discrete-time Fourier transform of Doppler signal, the method extracted the Doppler frequency difference curves and identified the curve discontinuity as the charac-teristic for accurate detonate control. The simulation showed that the proposed algorithm was more accurate than short-time Fourier transform and contained more rendezvous information, which could effectively improve the detonating control performance.