基于多普勒信号幅频信息联合处理的炸高控制技术

Burst Height Control Technique Based on Doppler Signal Amplitude-frequency Information Combining Processing

连续波多普勒体制迄今仍是常规压制弹药无线电引信的主要体制,但它存在炸高散布大、抗干扰性能不强等缺点。研究了混合型微处理器为核心的信号处理电路,建立了经验模型,通过对电路系统及背景噪声统计处理动态计算信噪比门限值,实现恒虚警处理;根据弹丸飞行时间计算限定目标信号的频率范围实现交会参数的选择;以多普勒周期为时基对多普勒信号幅频信息进行统计分析、联合处理,实现对炸高的精确控制。实验室半实物仿真结果表明:幅频信息联合处理的炸高控制技术可在赤道面方向图各向异性的微波连续波多普勒无线电引信上使用,具有良好的炸高控制精度及抗干扰能力。

CW Doppler system is still the main system of radio fuze for conventional suppression ammunition. It has the shortcoming of larger burst height dispersion and poor antijamming. A signal processing circuit based on hybrid microprocessor was researched, empirical model was setup, and constant false alarm processing was real- ized through processing noises of the circuit system and background, computing the signal-to-noise threshold. En- counter parameter was chosen by computing the frequency range of the limited target signal according to the flight time of the projectile,and the precise control of burst height was realized by taking the Doppler duration as time base to make the statistic analysis and combining processing of amplitude-frequency information of Doppler signal. Hardware-in-loop simulation test results indicate that the burst height control method based on ampli- tude-frequency information combining processing can be used in a microwave continuous wave Doppler radio fuze which has an anisotropic equatorial plane directivity pattern. It is characterized by good burst height control capacity and antijamming ability.