直升机加装设备电磁干扰研究

Research on Electromagnetic Interference of Helicopters with Devices Installed

直升机通过加装电子设备,其用途愈加广泛,而带来的电缆辐射及设备超限问题也越来越引起重视。对于直升机的大型复杂系统而言,在有限空间内集成的电子设备越来越多,电磁能量的耦合途径越来越复杂,要理论分析加装电子设备及电缆带来的电磁干扰也越来越困难。为解决上述问题,利用电磁仿真软件CST搭建直升机及加装设备模型,从加装电子设备内外部电缆辐射两个方面进行了仿真。仿真结果表明,在多种信号激励下,当电子设备外部电缆未加装屏蔽层时,上述设备在低频段超限,加装屏蔽层可解决超限问题。

For complex systems such as helicopter, the electronic devices are integrated in the limited space more and more, the coupling way of electromagnetic energy is more and more complex. It is more and more difficult to ana- lyze the electromagnetic interference caused by the installation of electronic devices and cables. In order to solve this problem, CST software is used to build the helicopter and the additional electronic device model, and simulate in two aspects ： internal and external cables radiation. The simulation results show that under the multiple signals, and when the external conductors of the electronic equipment are not screened, the excitation can exceed the limit value in some frequency band, and the radiation value can be reduced by shielding.