Download or read book A Plan for Revolutionary Change in Gas Turbine Engine Control System Architecture written by Dennis E. Culley and published by BiblioGov. This book was released on 2013-06 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: The implementation of Distributed Engine Control technology on the gas turbine engine has been a vexing challenge for the controls community. A successful implementation requires the resolution of multiple technical issues in areas such as network communications, power distribution, and system integration, but especially in the area of high temperature electronics. Impeding the achievement has been the lack of a clearly articulated message about the importance of the distributed control technology to future turbine engine system goals and objectives. To resolve these issues and bring the technology to fruition has, and will continue to require, a broad coalition of resources from government, industry, and academia. This presentation will describe the broad challenges facing the next generation of advanced control systems and the plan which is being put into action to successfully implement the technology on the next generation of gas turbine engine systems.

Download or read book Transition in Gas Turbine Control System Architecture Modular Distributed and Embedded written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2019-01-18 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Controls systems are an increasingly important component of turbine-engine system technology. However, as engines become more capable, the control system itself becomes ever more constrained by the inherent environmental conditions of the engine; a relationship forced by the continued reliance on commercial electronics technology. A revolutionary change in the architecture of turbine-engine control systems will change this paradigm and result in fully distributed engine control systems. Initially, the revolution will begin with the physical decoupling of the control law processor from the hostile engine environment using a digital communications network and engine-mounted high temperature electronics requiring little or no thermal control. The vision for the evolution of distributed control capability from this initial implementation to fully distributed and embedded control is described in a roadmap and implementation plan. The development of this plan is the result of discussions with government and industry stakeholders Culley, Dennis Glenn Research Center NASA/TM-2010-216806, GT2010-23226, E-17438

Download or read book Transition in Gas Turbine Control System Architecture written by Dennis Culley and published by BiblioGov. This book was released on 2013-07 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Controls systems are an increasingly important component of turbine-engine system technology. However, as engines become more capable, the control system itself becomes ever more constrained by the inherent environmental conditions of the engine; a relationship forced by the continued reliance on commercial electronics technology. A revolutionary change in the architecture of turbine-engine control systems will change this paradigm and result in fully distributed engine control systems. Initially, the revolution will begin with the physical decoupling of the control law processor from the hostile engine environment using a digital communications network and engine-mounted high temperature electronics requiring little or no thermal control. The vision for the evolution of distributed control capability from this initial implementation to fully distributed and embedded control is described in a roadmap and implementation plan. The development of this plan is the result of discussions with government and industry stakeholders.

Download or read book Gas Turbine Design Components and System Design Integration written by Meinhard T. Schobeiri and published by Springer Nature. This book was released on 2019-11-25 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the second revised and enhanced edition of the book Gas Turbine Design, Components and System Integration written by a world-renowned expert with more than forty years of active gas turbine R&D experience. It comprehensively treats the design of gas turbine components and their integration into a complete system. Unlike many currently available gas turbine handbooks that provide the reader with an overview without in-depth treatment of the subject, the current book is concentrated on a detailed aero-thermodynamics, design and off-deign performance aspects of individual components as well as the system integration and its dynamic operation. This new book provides practicing gas turbine designers and young engineers working in the industry with design material that the manufacturers would keep proprietary. The book is also intended to provide instructors of turbomachinery courses around the world with a powerful tool to assign gas turbine components as project and individual modules that are integrated into a complete system. Quoting many statements by the gas turbine industry professionals, the young engineers graduated from the turbomachinery courses offered by the author, had the competency of engineers equivalent to three to four years of industrial experience.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transition in Gas Turbine Engine Control System Architecture Modular Distributed Embedded written by and published by . This book was released on 2009 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presentations from the Distributed Engine Control Working Group included: Vision and need for future turbine engine control; Implementation and technology challenges; High temperature electronics; Innovation and entry barriers.

Download or read book Gas Turbine Design Components and System Design Integration written by Meinhard T. Schobeiri and published by Springer. This book was released on 2017-06-06 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book written by a world-renowned expert with more than forty years of active gas turbine R&D experience comprehensively treats the design of gas turbine components and their integration into a complete system. Unlike many currently available gas turbine handbooks that provide the reader with an overview without in-depth treatment of the subject, the current book is concentrated on a detailed aero-thermodynamics, design and off-deign performance aspects of individual components as well as the system integration and its dynamic operation.This new book provides practicing gas turbine designers and young engineers working in the industry with design material that the manufacturers would keep proprietary. The book is also intended to provide instructors of turbomachinery courses around the world with a powerful tool to assign gas turbine components as project and individual modules that are integrated into a complete system. Quoting many statements by the gas turbine industry professionals, the young engineers graduated from the turbomachinery courses offered by the author, had the competency of engineers equivalent to three to four years of industrial experience.

Download or read book Improving Gas Turbine Engine Control System Component Optimization by Delaying Decisions written by Craig Todd Stambaugh and published by . This book was released on 2003 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gas Turbine Fuel Controls Analysis and Design written by SAE Powerplant Activity Committee. Gas Turbine Committee and published by Pergamon. This book was released on 1965 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Towards Verifiable Adaptive Control of Gas Turbine Engines written by Mehrdad Pakmehr and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation investigates the problem of developing verifiable stable control architectures for gas turbine engines. First, a nonlinear physics-based dynamic model of a twin spool turboshaft engine which drives a variable pitch propeller is developed. In this model, the dynamics of the engine are defined to be the two spool speeds, and the two control inputs to the system are fuel flow rate and prop pitch angle. Experimental results are used to verify the dynamic model of JetCat SPT5 turboshaft engine. Based on the experimental data, performance maps of the engine components including propeller, high pressure compressor, high pressure, and low pressure turbines are constructed. The engine numerical model is implemented using Matlab. Second, a stable gain scheduled controller is described and developed for a gas turbine engine that drives a variable pitch propeller. A stability proof is developed for a gain scheduled closed-loop system using global linearization and linear matrix inequality (LMI) techniques. Using convex optimization tools, a single quadratic Lyapunov function is computed for multiple linearizations near equilibrium and non-equilibrium points of the nonlinear closed-loop system. This approach guarantees stability of the closed-loop gas turbine engine system. To verify the stability of the closed-loop system on-line, an optimization problem is proposed which is solvable using convex optimization tools. Through simulations, we show the developed gain scheduled controller is capable to regulate a turboshaft engine for large thrust commands in a stable fashion with proper tracking performance. Third, a gain scheduled model reference adaptive control (GS-MRAC) concept for multi-input multi-output (MIMO) nonlinear plants with constraints on the control inputs is developed and described. Specifically, adaptive state feedback for the output tracking control problem of MIMO nonlinear systems is studied. Gain scheduled reference model system is used for generating desired state trajectories, and the stability of this reference model is also analyzed using convex optimization tools. This approach guarantees stability of the closed-loop gain scheduled gas turbine engine system, which is used as a gain scheduled reference model. An adaptive state feedback control scheme is developed and its stability is proven, in addition to transient and steady-state performance guarantees. The resulting closed-loop system is shown to have ultimately bounded solutions with a priori adjustable bounded tracking error. The results are then extended to GS-MRAC with constraints on the magnitudes of multiple control inputs. Sufficient conditions for uniform boundedness of the closed-loop system is derived. A semi-global stability result is proven with respect to the level of saturation for open-loop unstable plants, while the stability result is shown to be global for open-loop stable plants. Simulations are performed for three different models of the turboshaft engine, including the nominal engine model and two models where the engine is degraded. Through simulations, we show the developed GS-MRAC architecture can be used for the tracking problem of degraded turboshaft engine for large thrust commands with guaranteed stability. Finally, a decentralized linear parameter dependent representation of the engine model is developed, suitable for decentralized control of the engine with core and fan/prop subsystems. Control theoretic concepts for decentralized gain scheduled model reference adaptive control (D-GS-MRAC) systems is developed. For each subsystem, a linear parameter dependent model is available and a common Lyapunov matrix can be computed using convex optimization tools. With this control architecture, the two subsystems of the engine (i.e., engine core and engine prop/fan) can be controlled with independent controllers for large throttle commands in a decentralized manner. Based on this D-GS-MRAC architecture, a "plug and play" (PnP) technology concept for gas turbine engine control systems is investigated, which allows us to match different engine cores with different engine fans/propellers. With this plug and play engine control architecture, engine cores and fans/props could be used with their on-board subordinate controllers ready for integration into a functional propulsion system. Simulation results for three different models of the engine, including the nominal engine model, the model with a new prop, and the model with a new engine core, illustrate the possibility of PnP technology development for gas turbine engine control systems.

Download or read book Parameterization Methods for Dynamic Design of Gas Turbine Engine Control Systems written by Zhi Yong Cai and published by . This book was released on 2008 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Influence of System Architecture Changes on Organizational Work Flow and Application to Geared Turbofan Engines written by Denman Halsted James and published by . This book was released on 2011 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design and development of a gas turbine engine for aircraft applications is a highly integrated process, and requires the integration of efforts of large numbers of individuals from many design specialties. If the design process is well defined and the product architecture is stable, the outcome of the process will become highly predictable and repeatable. In the case that there are significant architecture changes due to technology insertion, customer requirements or overall changes in component configuration for performance, this large and integrated design process may become more challenging. Communication of design intent, requirements and predicted performance for all of the components, systems and subsystems must be made without error to all involved in the development of the product. Pratt & Whitney is a large gas turbine engine design company, and has been in the engine business since it's inception in 1925. In 2008, P&W designed, built and flew a large "Geared Turbofan" engine which was a demonstrator for a new product architecture being developed, the first of the new product family being the PWl 524G. This new engine architecture is different from the more traditional turbofan engine architecture in the use of a reduction gear set between the fan and the turbine shaft which drives it. Earlier work in examination of gas turbine engine product-design process interactions has been performed with a traditional high bypass ratio gas turbine engine architecture using the PW4098. Using two test cases, the PW4098 and PW1524G, this work seeks to map the architecture of a gas turbine aero engine in the Design Structure Matrix format, with all major connectivity shown, and then to apply organizational information in the form of Domain Matrix Maps to the physical architectural connectivity to determine which portions of the architecture result in additional or functional group interactions. The determination of the architecture driven changes in the number of functional group interactions is made first, and then isolation of "novel" functional group interactions is made with the original architecture serving as the baseline for organizational interaction. Analysis of these results is then performed to examine the potential organizational impact of moving from traditional turbofan architecture to a geared turbofan architecture. The potential impact to the organization in assessed and recommendations are made to minimize the potential impact of the change. The analysis presented shows that the change in engine architecture represents a move to a more distributed and less modular architecture. The DSM shows a 20% increase in density of connectivity between components. From an organizational impact perspective, there is a 30% change overall in the total number of functional group interactions in the integration of the engine. The impact of these changes on particular design functional groups is discussed, and the data suggests that the more distributed architecture of the PW1524G likely will require more system integration effort than the traditional turbofan architecture of the PW4098.

Download or read book Transition in Gas Turbine Control System Architecture written by Dennis Culley and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transition in gas turbine control system architecture written by Dennis Culley and published by . This book was released on 2010 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1996 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Linearizing and Distributing Engine Models for Control Design written by Timothy Michael Seitz and published by . This book was released on 2013 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Turbine engine control is used widely today and is about to undergo a revolution in its control architecture. Currently, all calculations are done on a single computer, known as the full authority digital engine controller (FADEC), which requires many cables, harnesses, and pins that add weight to the system. To improve performance and efficiency, a distributed architecture is being proposed to allow for advancement to take place. Distributed engine control will allow the sensor and actuators to act as nodes, carrying out A/D and D/A conversions as well as potentially control logic. This architecture also allows for easier design of the engine's control system by allowing it to be more scalable and prevent obsolescence. However, implementing control logic over a network induces time varying delays which need to be designed around. This paper proposes different setups that attempt to make the system robust to these delays, by implementing discrete control systems with observers to estimate non-present sensor data.

Download or read book Design of a Family of Gas Turbine Engines with a Common Core written by S. Tuhme and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: