复杂飞行器电气系统抗干扰设计技术研究

Research on Anti-interference Design Technology of Complex Electrical System of Aircraft

摘要:

结合现代飞行器因其功能复杂，设备种类和数量众多，电气系统规模庞大，设备间连接关系复杂，接口信号类型多的特点，针对其较高的抗干扰性能和可靠性要求，系统分析了复杂飞行器电气系统辐射、电源串扰、浪涌串扰等干扰源类型、特性及影响。针对影响电路的传导、辐射、差模、共模干扰四种干扰模式，提出了可以从源头抑制提高复杂飞行器电气系统抗干扰性能的四个方面的设计方法和注意事项，分别是接地设计、屏蔽设计、隔离设计和滤波设计。最后，结合典型案例，分析了某飞行器电气系统因设计缺陷存在地信号干扰问题，通过增加隔离措施解决了该干扰问题，并通过了试验验证。

Abstract:

Combined with the characteristics of modern aircraft , which has Complex functions, many kinds of equipment, large number of equipment, large scale of electrical system, complicated interdevice connection and many interface signal types , For high anti-interference performance and reliability requirements , the types, characteristics and influence of interference sources, such as radiation, power supply crosstalk, surge and crosstalk are analyzed systematically . In view of the influence of circuit conduction, radiation, differential mode and common mode interference four interference pattern, the design method was put forward in four aspects from the source to improve the suppression of complex aircraft electrical system anti-jamming performance and precautions , which is grounding design, shielding design, isolation design and filter design. Finally, combined with typical cases, the problem of signal interference in the electrical system of an aircraft is analyzed, which is solved by adding isolation measures and verified by experiments.