Study On A Remote Fault Collaborative Diagnosis Concurrent Mechanism Of Aircraft

With the development of civil aviation industry of China, how to ensure the flight safety of civilian aircraft has become a more and more important issue. The key to solve this problem is to establish an aircraft fault diagnosis system, by which the aircraft faults can be diagnosed in time and positioned accurately. Nowadays, the rapid development of Internet makes it likely to use the Computer Supported Cooperative Work in the process of the remote fault diagnosis.In this process of remote fault diagnosis, each aircraft system has its own relatively independent system, therefore the field of knowledge in which theoretical foundation, detective methods and parameters used for fault diagnosis involve is relatively independent also. The system and its subsystems have some links, and also have the characteristics of relative independence, which results in two mainly problems of the process of information interaction among the principal parts of the traditional remote fault diagnosis. The one hand is determining the priority of the cooperative parts in order to decide to use parallelism or serial in the process of sending fault request; the other hand is consistency during the fault solutions submit.Through analyzing the issues which arise in the process of the aircraft remote fault diagnosis, the Study on a Remote Fault Collaborative Diagnosis and Concurrent Mechanism of Aircraft is put forward and some research is made as follows in the thesis:(1) Based on the introduction of various fault diagnosis technology, remote fault diagnosis technology based on network is chose to be the research object.(2) Based on introducing the computer supported collaborative work theory and locking mechanisms theory, according to the characteristic of aircraft remote fault diagnosis, the temporal relations among the concurrent control technology of role-based aircraft remote collaborative diagnosis, the application of locking mechanisms and the cooperative task are studied, and the corresponding calculation methods are established.(3) The basic theory of Petri Net theory, the current applications scopes and features are studied, and establish control model of the Petri Net in the process of remote collaborative diagnosis in order to schedule experts of different places dynamically.(4) The overall scheme and the structure mode are studied and the framework of the aircraft remote fault collaborative diagnosis system which is based on B/S structure is established on the basis of analyzing the requirements of aircraft remote fault collaborative diagnosis system, developed by ASP.NET and supported by Microsoft SQL Server 2000.(5) In the concurrency control system of aircraft remote fault diagnosis, the collaborative operation of aircraft remote fault diagnosis system and the experts dynamic scheduling are tested through the existing campus network. Take the"engine starting overheating"as an example to validate and the model is proved to be correct.