In this paper, the authors attempt to demonstrate: how optical fibre sensors can provide valuable information about circuit breaker operation, free from the uncertainties and malfunction from which electronic sensors ...
In this paper, the authors attempt to demonstrate: how optical fibre sensors can provide valuable information about circuit breaker operation, free from the uncertainties and malfunction from which electronic sensors suffer during live testing; and how the sensor information can be used to validate fundamental physical modelling of the arc-aerodynamic interaction on the one hand and from the basis of condition monitoring via chromatic processing on the other. The example chosen shows clearly the conflicting needs of the modelling and monitoring applications.
Highly sophisticated control strategies are generally employed to control aircraft gas turbine engines which have to operate in harsh environmental conditions. Faults are difficult to detect with this increased comple...
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Highly sophisticated control strategies are generally employed to control aircraft gas turbine engines which have to operate in harsh environmental conditions. Faults are difficult to detect with this increased complexity and the present fault detection systems sometimes indicate the wrong components to be faulty. These faults cost the airline industry millions of pounds each year. To improve the performance of these existing systems an autonomously learning fault detection system is proposed. The system is capable of detecting new faults and also adapting to faults that are similar to faults previously encountered. This paper presents the performance of this system when applied to real engine data and gives details on the improvements made to the system.
This paper describes a reuse-oriented approach to software development currently being investigated at rolls Smith Engine controls Limited (RoSEC). It argues that reuse be structured at three levels: domain, component...
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This paper describes a reuse-oriented approach to software development currently being investigated at rolls Smith Engine controls Limited (RoSEC). It argues that reuse be structured at three levels: domain, component and artifact. The authors demonstrate how these three levels have been used to achieve the systematic reuse of requirements for engine control software. Practical lessons from applying domain-specific techniques to system development are also discussed.
Gas turbine engines are highly non-linear, multi-sample rate, multi-input/multioutput systelus with fast changing dynamics. As a consequence a representative gas turbine engine model that comprises of the engine, its ...
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Gas turbine engines are highly non-linear, multi-sample rate, multi-input/multioutput systelus with fast changing dynamics. As a consequence a representative gas turbine engine model that comprises of the engine, its accessories and the controller, is extremely complex and interactive, incorporating look-up tables derived from real engine data and a mixture of continuous and logical functions. In this paper, a SIMULINK model of the gas turbine engine and controller is described. This model is being primarily used for generating simulated fault data that is being used to train neural networks for fault diagnosis. The current work focuses on using Resource Allocating Networks (RAN) to not only identify faults but to give an indication of the duration of the faults
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