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飞机电源系统机内自检测（Ｂｕｉｌｔ－ｉｎ－ｔｅｓｔ，ＢＩＴ）技术已日益受到人们的重视，文中介绍了ＢＩＴ技术及其四个方面，即：检测技术、信号处理技术、故障识别和诊断技术、故障处理技术。阐述了飞机电源已经历了四代发展及其已实现了数字化、标准化的现状，指出飞机电源ＢＩＴ技术的核心是故障诊断技术，并对我国今后飞机电源ＢＩＴ技术的发展提出了建议，指出了发展方向。
Built-in-test (BIT) technology of aircraft power system has been paid more and more attention. This paper introduces BIT technology and its four aspects, namely, detection technology, signal processing technology, fault identification and diagnosis technology, Troubleshooting technology. It states that the power of aircraft has gone through four generations of development and has realized the status quo of digitization and standardization. It is pointed out that the core of aircraft power BIT technology is fault diagnosis technology, and the future development of BIT technology for aircraft power is put forward. direction.