Research and Application of ATML for Aircraft Electric Power Diagnosis and Prognostic System

The technology of integrated health management (IHVM) is an important approach to improve the security, reliability and maintainability of airplanes and spacecrafts, and to reduce their cost significantly. Taken aircraft electric power system into consideration, it is one of the important equipment that provides electric energy for all electro-equipments in airplane. Its working state is a crucial to ensure airplane normal and secure flight, so the research of condition detection, fault diagnosis and prognosis is a great concern in the field of IHVM system. Aiming at interoperability and complexity of data exchanging for aircraft electric power diagnosis and prognostic system, a method of using ATML (automatic test markup language) based on XML (extensible markup language) is proposed in order to describe the information of devices and conditions for fault diagnosis and prognostic in the system. First, based on reference frame of integrated health management system, a distributed multi-level fault diagnosis and prognosis system structure that exchange data through ATML is designed. Secondly, condition monitor is a foundation of fault diagnosis and prognosis, and a schema of test information for aircraft electric power parameters is designed by using ATML after data of crucial fault is analyzed. The result shows that the method can implement seamless interaction among test, diagnosis and prognosis. At same time, sharing and transplant of test information and diagnostic knowledge is improved and the process of fault diagnosis is accelerated.