航空电子设备研制的测试性设计考虑

D esign Consideration for Avionics Equipm ent D evelopm ent

测试性是航空电子设备基本设计特性,测试性设计的好坏直接决定了航空电子设备感知自身状态(正常、故障和降级)并自动隔离内部故障的能力。从全寿命周期费用探讨了民用飞机航空电子设备开展测试性设计的必要性,给出了民用飞机研制过程中航空电子设备通用测试性设计、机内测试设计和电路及元器件的测试性设计考虑。实践证明航空电子设备开展测试性设计能有效提高民用飞机的功能安全性和维修经济性。

Testability is a basic design characteristic of avionics,which determines the ability of status（ normal,malfunction,degradation） self-awareness and automatic internal failure isolation for avionics. Based on the whole life cycle cost,the necessity of testability design is discussed for commercial aircraft avionics. The testability design consideration of avionics general testability design,BIT design,ICs（ Integrated Circuits） and components are proposed during the development of commercial aircraft. Engineering practices show that the testability design efforts can be beneficial for raising the flight safety and maintenance economy of commercial aircraft.