基于相位差分的弹丸进动周期提取

doi:10.3969/j.issn.1000-1093.2017.01.023

摘要/Abstract

摘要： 进动周期是表征炮弹、火箭弹等常规武器无控弹丸弹道特性的重要指标。为有效获取弹丸进动周期，提出了基于相位差分的弹丸进动周期提取方法。弹丸进动会对连续波雷达回波产生微多普勒调制，建模分析表明，进动弹丸的微动速度遵循正弦规律变化，其相位变化率与进动周期呈反比关系。利用Hilbert变换可以提取微动速度的瞬时相位，由相位差分即可获得弹丸进动周期。仿真实验验证了该方法对信噪比大于7 dB的微动速度提取进动周期具有更好的性能。利用该方法对实际测量数据进行处理，获取了弹丸准确、平滑的进动周期数据。

关键词: 兵器科学与技术, 连续波雷达, 进动周期, 微多普勒, Hilbert变换

Abstract: For uncontrolled projectile, such as cannonballs, rockets, etc, precession period is an important parameter of the trajectory characteristic. To obtain the precession period of projectile effectively, a precession period extraction method based on phase differential is introduced. Precession of projectile brings micro-Doppler modulation on echoes of continuous-wave radar, and its mathematic model indicates that the micro-velocity produced by precession changes with the law of sine, and the change rate of its phase is inversely proportional to precession period. The phase of the micro-velocity can be obtained by Hilbert transform, and then the precession period can be derived by the phase differential of the micro-velocity. The experimental results show that, for the micro-velocity signal which S/N is greater than 7 dB, precession period can be effectively extracted with the proposed method, and this method is more precise and smooth for actual measuring data. Key

Key words: ordnancescienceandtechnology, continuouswaveradar, precessionperiod, micro-Doppler, Hilberttransform

中图分类号:

TJ012.3⁺6

刘志学，宫志华，冷雪冰. 基于相位差分的弹丸进动周期提取[J]. 兵工学报, 2017, 38(1): 177-183.

LIU Zhi-xue, GONG Zhi-hua, LENG Xue-bing. Extraction of Precession Period of Projectile Based on Phase Differential[J]. Acta Armamentarii, 2017, 38(1): 177-183.

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