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A family-oriented software development process for engine controllers

Lecture Notes in Computer Science

作者： Allenby, Karen Burton, Simon Buttle, Darren McDermid, John Murdoch, John Stephenson, Alan Bardill, Mike Hutchesson, Stuart Rolls-Royce University Technology Centre in Systems and Software Engineering Department of Computer Science University of York YorkYO10 5DD United Kingdom Rolls-Royce Plc Control Systems SinC-3 P.O. Box 31 Moor Lane DerbyDE24 8BJ United Kingdom

ISBN: (纸本)3540425713

This paper presents a software engineering process that includes family-based aspects for aero-engine control software. The process uses a "family capability" derived from family analysis of the embedding system. This analysis allows reuse capability to be designed into the process by exploiting prior knowledge of the differences between members of an engine family. The process described follows the traditional software lifecycle. However, the nature of the stages is modified to incorporate the use of the family capability, essentially to allow systematic application of both compositional and generational reuse throughout the development process. The process described was evaluated on a trial project to develop, and subsequently modify, a thrust reverser system for a small aero-engine. Initial results show that this process can reduce effort for both initial and subsequent developments through the use of the family capability. © Springer-Verlag Berlin Heidelberg 2001.

关键词： Engines

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PES Meetings

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IEEE Power engineering Review 2001年第4期21卷 25-25页

作者： C. Booth J.R. McDonald P. Donald N. Lines N. Cooke C. Smith Rolls-Royce University Technology Centre University of Strathclyde Glasgow UK Rolls-Royce Strategic Systems Engineering Derby UK

This letter has presented an overview of activities to date with respect to the development and demonstration of anomaly detection functions, which analyze key parameters from an industrial gas turbine during its starting sequence. The software modules have been shown to be able to successfully detect anomalies in the start sequences. The software has been developed using a combination of simulated and actual plant performance data and is currently in the process of being implemented in the field. In the longer term, as the level of operational experience and knowledge grows, the anomaly detection functions can be augmented to include prognostic and diagnostic functionality. This will permit not only the detection of anomalous behavior but also the provision of information to plant operators as to the suspected cause of the anomaly.

关键词： Condition monitoring Turbines Power generation Power generation economics Gas industry Power system modeling Cost function Computer industry Engines Temperature

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Multi-Disciplinary Optimisation Applied to a Vertical Lift control System

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IFAC Proceedings Volumes 2000年第26期33卷 729-734页

作者： H.A. Thompson P.J. Fleming Rolls-Royce University Technology Centre in Control and Systems Engineering Department of Automatic Control and Systems Engineering University of Sheffield Mappin Street Sheffield SI 3JD United Kingdom

The design of complex systems such as the Lift control System for a vertical take-off and landing aircraft poses challenging problems. It is necessary to consider the design of the system from the point of view of many design disciplines to optimise acquisition and operating support costs, weight, maintainability and availability of the system. A design process, based on multiobjective optimisation and employing evolutionary computing methods is described and its application demonstrated on this application.

关键词： multiobjective optimisation genetic algorithms flight control architectures

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A Smart Actuator for Fault-Tolerant control

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IFAC Proceedings Volumes 2000年第11期33卷 807-812页

作者： D. Lee G. Allan H.A. Thompson S. Bennett Department of Automatic Control and Systems Engineering Rolls-Royce University Technology Centre in Control and Systems Engineering The University of Sheffield Mappin Street Sheffield SI 3JD United Kingdom Tel: +44-114-222-5236 Fax.: +44-114-273-1729

Recent advances in smart actuator and fieldbus technologies are promoting changes in fault-tolerant control design issues. In this paper, a smart actuator scheme is implemented based on a low-cost stepper-motor and CAN bus interface. In order to enhance fault-tolerance capability of the control system, the proposed scheme is focused on self-diagnosis and self-compensation of undesirable actuator characteristics produced by faults. Experimental results with a distributed architecture demonstrator show that actuator faults can be accommodated successfully without a redundant actuator by using the proposed smart actuator scheme.

关键词： fault-tolerance actuators backlash nonlinearity fieldbus

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Application of Parameter Estimation Techniques to a Smart Fuel Metering System

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IFAC Proceedings Volumes 2000年第11期33卷 1059-1064页

作者： H Benítez-pérez S.M. Hargrave H.A. Thompson P.J. Fleming Department of Automatic Control and Systems Engineering University of Sheffield Mappin Street Sheffield S1 3JD United Kingdom Rolls-Royce University Technology Centre in Control Systems Engineering Department of Automatic Control and Systems Engineering University of Sheffield Mappin Street Sheffield S1 3JD United Kingdom

The application of parameter estimation techniques to monitor the health of a smart fuel metering unit for a gas turbine engine is reported. The process dynamics of this fuel metering unit are multivariable and non-linear. The parameter estimates are used to form fault residual signals that are processed by a fuzzy logic-based evaluation procedure to form health monitoring information. The condition monitoring information resulting from this evaluation is presented in a modified SEVA standard.

关键词： Parameter Estimation Fault Detection Fault Isolation Gas Turbine Fuel control

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PID control for a Distributed System with a Smart Actuator

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IFAC Proceedings Volumes 2000年第4期33卷 499-504页

作者： D. Lee H.A. Thompson S. Bennett Department of Automatic Control and Systems Engineering The University of Sheffield Mappin Street Sheffield S1 3JD United Kingdom Rolls-Royce University Technology Centre in Control and Systems Engineering The University of Sheffield Mappin Street Sheffield S1 3JD United Kingdom Tel: +44-114-222-5236 Fax.: +44-114-273-1729

Recent advances in smart actuator and fieldbus technologies are promoting changes in PID controller design issues. By employing a built-in microprocessor a smart actuator, in general, is capable of self-validation and compensation. In this paper, online retuning of PID controller for a distributed system that contains a smart actuator is explored. The on-line controller retuning is carried out using a set of validation data generated by a smart actuator. The proposed approach is investigated by means of a distributed architecture demonstrator which consists of a set of PCs and a stepper-motor based smart actuator interconnected through fieldbus network.

关键词： PID control actuators nonlinearity fieldbus distributed control

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An Integrated Multi-Disciplinary Optimisation Environment for Distributed Aero-Engine control systems Architectures

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IFAC Proceedings Volumes 1999年第2期32卷 8084-8088页

Currently, there is considerable interest in adopting distributed control systems for aerospace applications. This is being driven by the perceived advantages: fewer and shorter buses, intrinsic partitioning, smaller control box size, increased health monitoring, increased system flexibility and reduced vulnerability to hazardous events and the advent of smart sensors and actuators. Designers are faced with a highly complex, laborious process of assessing the trade-offs and constraints from many different design disciplines. In this work a design environment is being developed to aid systems engineers in the selection and optimisation of control systems architectures

关键词： Multi-Objective Optimisation distributed systems

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The use of case-based reasoning technology to aid fault isolation in a modern gas turbine engine design

The use of case-based reasoning technology to aid fault isol...

引用

ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition, GT 1998

作者： Hargrave, S.M. Fleming, P.J. Rolls-Royce University Technology Centre in Control and Systems Engineering Department of Automatic Control and Systems Engineering University of Sheffield Mappin Street SheffieldS1 3JD United Kingdom

ISBN: (纸本)9780791878668

The increasing numbers of commercial decision support tools based on Case-Based Reasoning (CBR) technology reflects the interest in the use of this technology to aid fault diagnosis, not only in gas turbine applications but also in the wider engineering domain. CASSIOPEE from CFM and ARIADNE from British Airways are but two examples of these types of support tool in the civil gas turbine engine arena. They reflect the trend of developing such systems from a historical database of maintenance arisings and necessarily apply to older engine designs. Further characteristics of which include older and less sophisticated aircraft maintenance systems, which provide limited diagnostic information and rely more heavily upon the experience of maintenance personnel to isolate engine faults successfully. It is this diagnostic experience which these CBR tools have attempted to capture and emulate;the case for a CBR-based tool in this instance is well proven. More recent aircraft design have resulted in a more comprehensive on-board maintenance systems to aid maintenance personnel diagnose airframe and engine faults. Such an approach should rely less heavily upon the experience of the maintenance crew to isolate a fault successfully. The paper reports on the design and development of two CBR-based maintenance decision support tools for the rolls-royce Trent 800 and RB21 1- 524 engines. One system is currently undergoing a trial to refine the design of the maintenance case base (the database over which the CBR engine searches to match the current fault symptoms to a historical event). The lessons learned from this field trial and future prospects for such a CBR-based maintenance aid are discussed. Copyright © 1998 by ASME - All Rights Reserved.

关键词： Gas turbines

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Multi-objective optimisation of systems architectures for distributed aero-engine control systems 34th

Multi-objective optimisation of systems architectures for di...

引用

34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, 1998

作者： Thompson, H.A. Fleming, P.J. Chipperfield, A.J. Rolls-Royce University Technology Centre in Control and Systems Engineering Department of Automatic Control and Systems Engineering University of Sheffield Mappin Street SheffieldS1 3JD United Kingdom

The increasing use of embedded intelligence to produce smart sensors and actuators offers great potential benefits in adopting a distributed control strategy in aerospace applications. There are many advantages to be gained: fewer and shorter buses, intrinsic partitioning, smaller control box size, increased health monitoring, increased system flexibility and reduced vulnerability to hazardous events. However, this has to be traded off against the problems of greater complexity, processor diversity, accessibility, exposure of electronics to severe environments, power distribution, software production costs and management. In this paper how multi-objective optimisation can be applied to this problem for the application of military gas turbine engines is considered. © 1998 by H. A. Thompson.

关键词： Multiobjective optimization

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Multi-objective optimisation of systems architectures for distributed aero-engine control systems

Multi-objective optimisation of systems architectures for di...

引用

ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition, GT 1998

ISBN: (纸本)9780791878668

关键词： Multiobjective optimization

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