Knowledge-based support in Non-Destructive Testing for health monitoring of aircraft structures

Maintenance manuals include general methods and procedures for industrial maintenance and they contain information about principles of maintenance methods. Particularly, Non-Destructive Testing (NDT) methods are important for the detection of aeronautical defects and they can be used for various kinds of material and in different environments. Conventional non-destructive evaluation inspections are done at periodic maintenance checks. Usually, the list of tools used in a maintenance program is simply located in the introduction of manuals, without any precision as regards to their characteristics, except for a short description of the manufacturer and tasks in which they are employed. Improving the identification concepts of the maintenance tools is needed to manage the set of equipments and establish a system of equivalence: it is necessary to have a consistent maintenance conceptualization, flexible enough to fit all current equipment, but also all those likely to be added/used in the future. Our contribution is related to the formal specification of the system of functional equivalences that can facilitate the maintenance activities with means to determine whether a tool can be substituted for another by observing their key parameters in the identified characteristics. Reasoning mechanisms of conceptual graphs constitute the baseline elements to measure the fit or unfit between an equipment model and a maintenance activity model. Graph operations are used for processing answers to a query and this graph-based approach to the search method is in-line with the logical view of information retrieval. The methodology described supports knowledge formalization and capitalization of experienced NDT practitioners. As a result, it enables the selection of a NDT technique and outlines its capabilities with acceptable alternatives

An Architectural Approach to Ensuring Consistency in Hierarchical Execution

Hierarchical task decomposition is a method used in many agent systems to organize agent knowledge. This work shows how the combination of a hierarchy and persistent assertions of knowledge can lead to difficulty in maintaining logical consistency in asserted knowledge. We explore the problematic consequences of persistent assumptions in the reasoning process and introduce novel potential solutions. Having implemented one of the possible solutions, Dynamic Hierarchical Justification, its effectiveness is demonstrated with an empirical analysis

Current Emergency Locator Transmitter (ELT) deficiencies and potential improvements utilizing TSO-C91a ELTs

An analysis was conducted of current ELT problems and potential improvements that could be made by employing the TSO-C91a ELTs to replace the current TSO-C91 ELTs. The scope of the study included the following: (1) validate the problems; (2) determine specific failure causes; (3) determine false alarm causes; (4) estimate improvements from TSO-C91a; (5) estimate benefits from replacement of the current ELTs; and (6) determine need and benefits for improved ELT inspection and maintenance. A detailed comparison between the two requirements documents (TSO-C91 and -91a) was made to assess improved performance of the ELT in each category of failure cause and each cause of false alarms. The comparison and analysis resulted in projecting a success of operation rate approximately 3 times the current rate and a reduction in false alarms to 0.25 of those generated by TSO-C91 ELTs. These improvements led to a projection of benefits of approximately 25 additional lives to be saved each year with TSO-C91a ELTs and an improved inspection and maintenance program

Status of advanced turboprop technology

Research is reviewed in the following areas: turboprop powered transport aircraft; wind tunnel aerodynamic and acoustics tests of model propellers; turboprop maintenance; and wind tunnel tests on airframe-turboprop interactions. Continued development of the technology for advanced turboprop transport was emphasized

Application of an AIS to the problem of through life health management of remotely piloted aircraft

The operation of RPAS includes a cognitive problem for the operators(Pilots, maintainers, ,managers, and the wider organization) to effectively maintain their situational awareness of the aircraft and predict its health state. This has a large impact on their ability to successfully identify faults and manage systems during operations. To overcome these system deficiencies an asset health management system that integrates more cognitive abilities to aid situational awareness could prove beneficial. This paper outlines an artificial immune system (AIS) approach that could meet these challenges and an experimental method within which to evaluate it

CFB Goose Bay and Operation “Desert Shield”

Canada committed forces to the American-led Coalition in the 1990–1991 campaign to liberate Kuwait (Operation DESERT SHIELD and Operation DESERT STORM). The Navy played an important role in the naval portion in this campaign known as Operation DESERT STORM. Canadian CF-18s provided defensive combat air patrols over the Persian Gulf region (less Kuwait and Iraq). Canadian soldiers helped guard prisoners of war, defend airfields and provide security for the 1st Canadian Field Hospital that provided additional health service support. While all of these were important contributions, Canada also provided assistance for Operation DESERT SHIELD. A number of states deployed forces to Saudi Arabia to aid in that Kingdom’s defence should Iraqi forces have attacked. Some Canadian contributions to this operation remain unacknowledged. The massive victory in DESERT STORM was a direct result of the efforts expended in DESERT SHIELD. The two operations comprise the 1991 Gulf Campaign. Canadian Forces Base (CFB) Goose Bay played a little known but remarkable role in Operation DESERT SHIELD in August 1990. It was, in fact, the first unit of the Canadian Forces to support the 1990–1991 Gulf Campaign by acting as a transit station for the US Air Force’s Military Airlift Command (MAC) as well as other US Air Force formations during Operation DESERT SHIELD

Survey of Employers in two LGAs in Southwestern Sydney 2013-2014

This is a report on the responses of 82 employers in Campbelltown, Fairfield, Narellan, Camden and Smeaton Grange, to a 2013-2014 survey designed to gather employers’ views of their skilled labour needs, in order to remain competitive and grow through innovation. Overall recommendation A lighthouse Regional Manufacturing Innovation and Workforce Development Partnership be piloted, to pioneer a regional program of information exchange and shared workforce development accessible to small and medium businesses. This Government-funded model would be supported by creating seconded or earmarked cross-organisational staff positions and roles, with the brief of working across employer groups, key training organisations and the three tiers of government. Their brief would be to provide a focus for gathering, exchanging and disseminating information that is timely, targeted, well- integrated and readily digestible. This information would cover: - Case study approaches to setting up local innovation initiatives - Environmental scanning of technological developments and locally-relevant market opportunities in Australian and global markets - Best- practice tools such as strategies and resources for induction and advice about accessing customised delivery of accredited workplace, online and off-site learning to building workplace expertise - Regional Manufacturing occupational labour market data, and a regional job-matching website specifically for use by local employers and jobseekers. The Partnership would also provide funding and practical support for the creation of recognized workplace development programs and resource materials supporting small manufacturing businesses in training novices and in upskilling staff. The Partnership would have initial funding for five years, and be tasked with the specific mission of embedding into ongoing practice the structures and approaches it develops. Development of the Badgerys Creek Precinct provides a unique catalyst, with significant multiplier effects, for the creation of such a South Western Sydney Advanced Manufacturing Initiative, one of whose focal points might be an Advanced Manufacturing and Aircraft Maintenance hub