某发射装置膛口信号抗干扰技术研究

【作者】 郝光荣；

【导师】 张越；

【作者基本信息】 南京理工大学 ， 机械工程， 2012， 硕士

【摘要】 本文主要针对某发射装置膛口信号抗干扰技术进行了分析与研究。通过对某发射装置膛口信号的产生机理分析,建立了磁化和非磁化两种弹丸膛口信号计算模型,得到了类似于正弦波的膛口信号,并根据某发射装置膛口的工作环境,确定出膛口装置中线圈的种类以及弹丸出膛时会受到的干扰因素。运用数字信号处理方法,对起滤波作用的数字滤波器进行了研究,分析了不同的窗函数和增加滤波器阶次分别对数字滤波器的滤波效果造成的影响。在以上分析的基础上,通过建立计算模型,对弹丸偏离枪管轴线运动和枪管振动两种干扰因素进行了具体分析,确定了这两种干扰因素对膛口信号的影响规律,从理论上讨论了控制和减小噪声干扰应采取的措施。利用MATLAB软件,模拟仿真了电磁辐射(均匀白噪声、高斯白噪声)对膛口信号造成的干扰,通过数字滤波器的作用,达到理想的抗干扰效果。本文通过模拟分析与仿真试验相结合的方法,为研究某发射装置膛口信号抗干扰处理完成了部分前期工作,取得的结果为进一步研究提供了一定的参考。更多还原

【Abstract】 The article mainly aims at that the analysis and research are carried out a launch device muzzle signal anti-interference technology. Through the analysis of the launch device muzzle signal generation mechanism, establish calculation model of magnetized and non-magnetized projectile muzzle signal, similar to get the sine wave muzzle signal, and according to the work environment of the launch device muzzle, determine the type of coil in muzzle device and the projectile when loaded by the interference factors. The use of digital signal processing methods, the filter role of the digital filter has been studied, analyzed respectively the filtering effect of the digital filter that the different window functions and increased filter order. On the basis of the above analysis, by establishing the calculation model, a detailed analysis is carried out that two interference factors of the projectile deviated from the barrel axis of movement and barrel vibration, determine the these two interference factors on the influence of the muzzle signal, in theory discuss the control and noise reduction measures to bu taken. Using MATLAB software, simulation of the electromagnetic radiation (uniform white noise, Gaussian white noise) on the muzzle signal interference, by the role of the digital filter, achieve the desired interference effect.In this paper, simulation analysis and the method of combining simulation were used for the study of muzzle signal jamming technology to complete some preliminary work, and the results of further studies provide some references.更多还原