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针对某新型反坦克导弹红外成像导引头内部电气设备密集,走线复杂,电磁兼容隐患突出的情况,对导引舱系统的电磁兼容性进行评估。在分析导引舱内部电磁环境的基础上,确立了干扰源、耦合途径和敏感设备。建立了干扰源模型、互连线缆模型和敏感设备模型,对导引舱系统的辐射兼容性和传导兼容性分别进行了评估,并得出了评估结论:电磁干扰源的辐射干扰和电机高频谐波电流通过电源线对功放输出波形的传导耦合干扰是舱内电磁干扰的主要耦合途径;电位计信号的安全裕度较小,是潜在的电磁兼容隐患。然后通过导引头的电磁自兼容测试,对仿真结论进行了验证。最后针对上述问题,就导引舱的电磁兼容设计提出了几点整改建议。
Aiming at the situation of dense electrical equipment, complex routing and obvious electromagnetic compatibility problems in a new anti-tank missile infrared imaging seeker, the electromagnetic compatibility of the guidance cabin system is evaluated. Based on the analysis of the electromagnetic environment inside the guidance cabin, the sources of interference, coupling paths and sensitive equipment were established. The interference source model, the interconnection cable model and the sensitive equipment model are established. The radiation compatibility and conduction compatibility of the guidance cabin system are respectively evaluated. The conclusions are drawn as follows: the radiation interference of the electromagnetic interference source and the height of the motor Frequency harmonic current through the power line on the power amplifier output waveform coupling coupling is the main room electromagnetic interference coupling; Potentiometer signal safety margin is small, potential electromagnetic compatibility problems. Then through the electromagnetic compatibility test of seeker, the simulation conclusion is verified. Finally, in view of the above problems, some suggestions for rectification are put forward on the EMC design of the guidance module.