考虑弹体旋转情况下的四元红外探测系统仿真

doi:10.12382/bgxb.2023.0170

摘要/Abstract

摘要：

为了准确分析四元红外探测系统跟踪电路的输出信号,为导弹导引头的跟踪和抗干扰算法提供准确的计算依据,分析该系统的工作原理,在考虑弹体旋转的情况下仿真四元红外探测系统与圆锥扫描相结合产生的目标图像轨迹。以某型便携式防空导弹为例,分析四元红外探测系统在有干扰和无干扰两种情况下的信息信号和目标捕获信号,在此基础上完成脉冲模拟跟踪和数字跟踪电路的信号仿真,开发四元红外探测系统的仿真软件。仿真实验结果表明:如果不考虑弹体旋转、直接仿真四元探测系统输出信号,则四元红外探测系统输出信号仿真结果会导致后期的跟踪电路输出信号仿真结果出现误差;当四元红外探测系统视场中只有目标像斑时,探测器输出可以准确地捕捉目标并计算其方位信息,当有干扰像斑时目标捕获信号输出异常;脉冲模拟跟踪电路和数字跟踪电路都可以计算目标的方位信息,但脉冲模拟跟踪的实现更为复杂。

关键词: 便携式防空导弹, 四元红外探测器, 圆锥扫描, 脉冲模拟跟踪, 数字跟踪

Abstract:

To precisely analyze the output signal of tracking circuit in a four-element infrared detection system and provide an accurate computational basis for the guidance and anti-jamming algorithms, this paper delves into its operational principle. Considering the missile spinning, the target image trajectory generated by combining the four-element infrared detection system with conical scanning is simulated. The information signals and target acquisition signals of four-element infrared detection system with and without interference are analyzed by taking a man-portable air defence missile as an example. Based on these findings, the signal simulations of pulse analog tracking and digital tracking circuits are accomplished, and a simulation software for the four-element infrared detection system is developed. Through simulation experiments, it is discovered that the direct simulation of output signal from four-element detection system without taking into account the missile spinning leads to the errors in the output signal simulation results of tracking circuit. When there’s only a target spot in the detector’s field-of-view, the target can be accurately captured and and its azimuth information is calculated from the detector output. However, when the interference spots present, the target acquisition signal output becomes abnormal. Both pulse analog and digital tracking circuits can compute the azimuth information of target, but the pulse analog tracking implementation is more intricate.

Key words: man-portable air defence missile, four-element infrared detection system, conical scanning, pulse analog tracking, digital tracking

中图分类号:

TJ301

王成, 王卫国, 孟晨, 李青, 成悦, 孔子华. 考虑弹体旋转情况下的四元红外探测系统仿真[J]. 兵工学报, 2024, 45(7): 2218-2227.

WANG Cheng, WANG Weiguo, MENG Chen, LI Qing, CHENG Yue, KONG Zihua. Simulation of Four-element Infrared Detection System Considering Missile Spinning[J]. Acta Armamentarii, 2024, 45(7): 2218-2227.

图/表 16

图1 光学系统工作原理示意图

Fig.1 Operating principle of the optical system

图2 调制器光敏面结构示意图

Fig.2 The structure of photodetector in the modulator

图3 调制原理示意图

Fig.3 Modulation principle

图4 四元红外探测器像斑扫描轨迹

Fig.4 Scanning trajectory of image spot on a four-element Infrared detector

图5 考虑弹体旋转情况下的四元红外探测系统

Fig.5 Four-element infrared detection system under the condition of missile spinning

图6 不考虑弹体旋转情况下的目标像斑轨迹

Fig.6 Trajectory of target image spot on four-element infrared detection system without considering missile spinning

图7 考虑弹体旋转情况下的四元红外探测系统目标像斑轨迹

Fig.7 Trajectory of target image spot on four-element infrared detection system under the condition of missile spinning

图8 单目标情况下四元红外探测系统输出信号仿真结果(ωM=15rad/s, ωφ=100rad/s, ρ=0.14mm,θ=45°, ρnoise=0mm, θnoise=0°)

Fig.8 Simulated results of output signal from four-element infrared detection system in a single target scenario(ωM=15rad/s, ωφ=100rad/s, ρ=0.14mm, θ=45°, ρnoise=0mm, θnoise=0°)

图9 设置干扰情况下四元红外探测系统输出信号仿真结果(ωM=15rad/s, ωφ=100rad/s, ρ=0.14mm,θ=45°, ρnoise=1.28mm, θnoise=-141.34°)

Fig.9 Simulated results of output signal from four-element infrared detection system under interference settings(ωM=15rad/s, ωφ=100rad/s, ρ=0.14mm, θ=45°, ρnoise=1.28mm, θnoise=-141.34°)

图10 跟踪电路工作流程

Fig.10 Workflow of the tracking circuit

图11 脉冲模拟跟踪电路系统方框图

Fig.11 Block diagram of pulse analog tracking circuit system

图12 调制线圈和基准线圈信号仿真波形

Fig.12 Simulated waveform of the modulation coil and reference coil signals

图13 UY和UZ信号仿真波形

Fig.13 Simulated waveforms of UY and UZ signals

图14 Us信号仿真波形

Fig.14 Simulated waveform of Us

图15 数字跟踪电路跟踪信息计算方法

Fig.15 Algorithm for calculating the tracking information in digital tracking circuit

图16 考虑弹体旋转情况下四元红外探测系统仿真软件界面

Fig.16 Simulation software interface of four-element infrared detection system under missile spinning

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