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The following topics are dealt with: test efficiency improvement; automatic testing; spectral and vector signal analysis; .NET framework; fault diagnosis; failure prognosis architecture; aircraft testing; system maintenance; digital instrumentation; system modernization; obsolescence; testing reliability; synthetic instrumentation; design testability; software standards and management; RF test; diagnostic...
Commercial off the shelf (COTS) equipment is generally preferred because of its low acquisition costs, wider user base and implied support from the vendor. Because it is treated as a black box, however, it is often complicated to measure the testability and diagnosability of the COTS equipment and therefore its supportability is difficult to predict. While some metrics for testability, diagnosability...
We need to focus on the exact cause of failure and perform prognostics during the test and repair cycle. Technology must change for test/diagnosis. With the advent of more robust microcircuits we need to think outside the box when if comes to testing. If we continue to perform diagnostics in the same manner, without considering other testing philosophies, we will continue to waste time and resources.
The introduction of EMA Systems requires the use of redundant inverters to drive the EMA and ensure reliability and safety. Redundant converters allow the implementation of fault tolerant control and high quality operation. Fault control has been implemented by means of redundant converter and fault detection system.
Timed failure propagation graph (TFPG) is a directed graph model that represents temporal progression of failure effects in physical systems. In this paper, a distributed diagnosis approach for complex systems is introduced based on the TFPG model settings. In this approach, the system is partitioned into a set of local subsystems each represented by a subgraph of the global system TFPG model. Information...
This paper presents a .NET framework as the integrating software platform linking all constituent modules of the fault diagnosis and failure prognosis architecture. The inherent characteristics of the .NET framework provide the proposed system with a generic architecture for fault diagnosis and failure prognosis for a variety of applications. Functioning as data processing, feature extraction, fault...
The present work shows a condition monitoring system applied to detect Fault Condition in EMA Systems. Removal of the engine hydraulic pumps requires fully-operative electrical power actuators and mastery of the flight control architecture. However, unexpected faults and lack of safety hinder the massive use of EMAs in flight control actuators and force to develop new systems and methods for supervision...
The paper considers the benefits and practicalities of using the Automatic Test Markup Language (ATML) family of Standards in Test Program Set (TPS) development and life cycle maintenance. As part of any TPS development, the exchange of critical information is key to the successful development of a TPS. At a project management level, these manifest themselves at key milestones in a development projects...
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