Remote Fault Diagnosis For Civil Aviation Engine

Aeroengine may fail at any time because of its vile working environment. As the heart of a plane, the health of civil aeroengine will affect the safety and schedules of flights directly. To meet the tide of network and information, the network technology based on Internet and fault diagnosis technology of civil aeroengine are combined in this paper, which can promote the maintenance and fault diagnosis methods to network environment, and it will largely improve the capability and efficiency of civil aeronautical maintenance system. The remote fault diagnosis based on Internet is a new technology field in which several developing branches are crisscrossing and permeating. From the point of engineering application, following research work based on civil aeroengine have been studied in this article.1. The technology status of fault diagnosis technology of civil aeroengine is analyzed firstly, technical route of realizing remote diagnosis of civil aeroengine is presented, technical thought of existing diagnosis devices and methods to realize network are discussed, and key technical problems to be solved are pointed out.2. How to make ferrous spectrum analysis system networked is emphasized in this paper. Functions and structural features of existing systems are analyzed, and then the thought of improving system networked is presented, which adopt techniques of up-down computer structure and Component Object Module (COM) to realize remote operation, status monitoring and controlling and remote transmission of pictures.3. A kind of smart remote data acquisition terminal, which is used to provide symptom information for remote fault diagnosis field, is studied in detail. On the basis of analysis of features of existing data acquisition terminal, a thought of designing a new data acquisition terminal which is portable, multifunction and can be directly connected to Internet is presented and realized hi engineering based on techniques of WebChip and high performance single chip computer.4. In order to realize manipulating remote diagnosis tools, the problem of Internet based remote control is studied. The delay characteristic on network is analyzed. A two-degree robot is used as the control object. The technology of neural networks for identifying the plant, general predictive control and data buffering logic are used to realize remote controlling.5. Computer Supported Cooperate Work (CSCW) which is adopted for remote fault diagnosis on Internet is studied hi this paper. Remote status monitoring of the diagnosed device is realized based on Lab View and G Web Server of National Instrument (NT). Two versatile CSCW environments for remote fault diagnosis are developed.6. As for the method of fault diagnosis, based on the FADEC system of CFM56-5B engine, fault diagnosis expert system (ES) based on Internet is studied. Network database is adopted to store knowledge base of ES and can be maintained on network conveniently. With COM techniques, knowledge inference is realized in web server, and can support several users to diagnose fault at the same time.