引信电磁感应系统电磁兼容性设计

EMC Design of Electromagnetic Induction System on Fuze

电磁兼容性设计在引信中越来越引起重视。对发射中引信与平台快速信息交联的电磁感应系统进行电磁兼容性设计,目的是提高系统的抗干扰性和优化结构。用图解及解析分析法分析20 MHz载波发射线圈的电磁场特性,对单、双组绕线感应磁场进行数值仿真表明,双组绕法电磁场更稳定。建立感应系统发射场和接收系统的Ansys有限元模型,通过仿真模拟证实屏蔽罩用铝或铜、泄气装置用铝可有效控制电磁辐射。实验验证表明,优化后结构满足国军标电磁兼容性的要求。

The EMC design on the fuze is paid attention increasingly.The EMC design of the electromagnetic induction system by which the fuze communicates with the platform quickly in shell launching is elaborated.The aim of the design is to improve the anti-interference performance of the system and to optimize the system structure.The characteristic of electromagnetic field of the launch coil the carrier wave frequency of which is 20 MHz is analyzed by graphical and analytical methods.The electromagnetic field which is resulted from the launch coil in single-group or double-group winding methods is simulated respectively by Matlab,by which we can find the launch coil in double-group winding method can produce a more stable electromagnetic field.The finite element modes of the launching system and the receiving system are modeled by Ansys.By the FEM simulation,the shield cover made of aluminum or copper and the air release equipment made of aluminum can control electromagnetic radiation effectively.It is tested by the experiments that the optimized structure meet with the EMC requirements of GJB.