论文部分内容阅读
出于通风散热、线缆进出的考虑,弹上很多设备的壳体表面都有孔洞,严重降低了壳体的电磁屏蔽效能,是造成电磁干扰的重要原因。弹上空间有限,负重对飞行成本的提高很大,且导弹飞行过程中过载很大,因此采取提高含孔缝壳体屏蔽效能的措施需同时考虑到所占空间、增加的重量和对设备结构强度的影响三个要素。提出了一种提高含孔缝腔体电磁屏蔽效能的新方法——加装屏蔽立柱,这种方法结构简单,基本不占用屏蔽壳体内的有限空间,也不会明显增加飞行重量,而且不影响线缆进出、通风散热、结构强度和电气连续性。理论计算和实验测试结果都验证了理论的正确性。
Out of ventilation and cooling, cable into and out of consideration, shells on the surface of many devices have holes on the shell, seriously reducing the electromagnetic shielding effectiveness of the shell, is an important cause of electromagnetic interference. Due to the limited space available on the missile and the heavy load, the flight cost is greatly increased and the missile is overloaded during the flight. Therefore, the measures taken to improve the shielding effectiveness of the slotted casing must take into account the space occupied, the added weight and the equipment structure The impact of three elements of strength. A new method to improve the electromagnetic shielding effectiveness of cavity with cavity is proposed, which is to install the shielding column. This method has the advantages of simple structure, little occupation of the limited space in the shielding shell and no significant increase in the weight of the flight, Cable entry and exit, ventilation and cooling, structural strength and electrical continuity. Theoretical calculations and experimental test results verify the correctness of the theory.