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A Hybrid Neural Network Genetic Algorithm Technique For Aircraft Engine Performance Diagnostics Nasa
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Book Synopsis A Hybrid Neural Network-Genetic Algorithm Technique for Aircraft Engine Performance Diagnostics by : Takahisa Kobayashi
Download or read book A Hybrid Neural Network-Genetic Algorithm Technique for Aircraft Engine Performance Diagnostics written by Takahisa Kobayashi and published by . This book was released on 2001 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper, a model-based diagnostic method, which utilizes Neural Networks and Genetic Algorithms, is investigated. Neural networks are applied to estimate the engine internal health, and Genetic Algorithms are applied for sensor bias detection and estimation. This hybrid approach takes advantage of the nonlinear estimation capability provided by neural networks while improving the robustness to measurement uncertainty through the application of Genetic Algorithms. The hybrid diagnostic technique also has the ability to rank multiple potential solutions for a given set of anomalous sensor measurements in order to reduce false alarms and missed detections. The performance of the hybrid diagnostic technique is evaluated through some case studies derived from a turbofan engine simulation. The results show this approach is promising for reliable diagnostics of aircraft engines.
Book Synopsis A Hybrid Neural Network-genetic Algorithm Technique for Aircraft Engine Performance Diagnostics ... Nasa by : United States. National Aeronautics and Space Administration
Download or read book A Hybrid Neural Network-genetic Algorithm Technique for Aircraft Engine Performance Diagnostics ... Nasa written by United States. National Aeronautics and Space Administration and published by . This book was released on 2003* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research & Technology 2001 written by and published by DIANE Publishing. This book was released on with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Control of Turbofan Engines by : Hanz Richter
Download or read book Advanced Control of Turbofan Engines written by Hanz Richter and published by Springer Science & Business Media. This book was released on 2011-10-20 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Control of Turbofan Engines describes the operational performance requirements of turbofan (commercial) engines from a controls systems perspective, covering industry-standard methods and research-edge advances. This book allows the reader to design controllers and produce realistic simulations using public-domain software like CMAPSS: Commercial Modular Aero-Propulsion System Simulation, whose versions are released to the public by NASA. The scope of the book is centered on the design of thrust controllers for both steady flight and transient maneuvers. Classical control theory is not dwelled on, but instead an introduction to general undergraduate control techniques is provided. Advanced Control of Turbofan Engines is ideal for graduate students doing research in aircraft engine control and non-aerospace oriented control engineers who need an introduction to the field.
Book Synopsis Aircraft Turbofan Engine Health Estimation Using Constrained Kalman Filtering by :
Download or read book Aircraft Turbofan Engine Health Estimation Using Constrained Kalman Filtering written by and published by . This book was released on 2003 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Kalman filters are often used to estimate the state variables of a dynamic system. However, in the application of Kalman filters some known signal information is often either ignored or dealt with heuristically. For instance, state variable constraints (which may be based on physical considerations) are often neglected because they do not fit easily into the structure of the Kalman filter. This paper develops an analytic method of incorporating state variable inequality constraints in the Kalman filter. The resultant filter is a combination of a standard Kalman filter and a quadratic programming problem. The incorporation of state variable constraints increases the computational effort of the filter but significantly improves its estimation accuracy. The improvement is proven theoretically and shown via simulation results obtained from application to a turbofan engine model. This model contains 16 state variables, 12 measurements, and 8 component health parameters. It is shown that the new algorithms provide improved performance in this example over unconstrained Kalman filtering.
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781724081209 Total Pages :40 pages Book Rating :4.0/5 (812 download)
Book Synopsis Cascade Optimization for Aircraft Engines with Regression and Neural Network Analysis - Approximators by : National Aeronautics and Space Adm Nasa
Download or read book Cascade Optimization for Aircraft Engines with Regression and Neural Network Analysis - Approximators written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-27 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NASA Engine Performance Program (NEPP) can configure and analyze almost any type of gas turbine engine that can be generated through the interconnection of a set of standard physical components. In addition, the code can optimize engine performance by changing adjustable variables under a set of constraints. However, for engine cycle problems at certain operating points, the NEPP code can encounter difficulties: nonconvergence in the currently implemented Powell's optimization algorithm and deficiencies in the Newton-Raphson solver during engine balancing. A project was undertaken to correct these deficiencies. Nonconvergence was avoided through a cascade optimization strategy, and deficiencies associated with engine balancing were eliminated through neural network and linear regression methods. An approximation-interspersed cascade strategy was used to optimize the engine's operation over its flight envelope. Replacement of Powell's algorithm by the cascade strategy improved the optimization segment of the NEPP code. The performance of the linear regression and neural network methods as alternative engine analyzers was found to be satisfactory. This report considers two examples-a supersonic mixed-flow turbofan engine and a subsonic waverotor-topped engine-to illustrate the results, and it discusses insights gained from the improved version of the NEPP code. Patnaik, Surya N. and Guptill, James D. and Hopkins, Dale A. and Lavelle, Thomas M. Glenn Research Center NASA/TM-2000-209177, E-11686, NAS 1.15:209177
Book Synopsis Adaptive Optimization of Aircraft Engine Performance Using Neural Networks by :
Download or read book Adaptive Optimization of Aircraft Engine Performance Using Neural Networks written by and published by . This book was released on 1995 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 2003 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Application of a Bank of Kalman Filters for Aircraft Engine Fault Diagnostics by :
Download or read book Application of a Bank of Kalman Filters for Aircraft Engine Fault Diagnostics written by and published by . This book was released on 2003 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper, a bank of Kalman filters is applied to aircraft gas turbine engine sensor and actuator fault detection and isolation (FDI) in conjunction with the detection of component faults. This approach uses multiple Kalman filters, each of which is designed for detecting a specific sensor or actuator fault. In the event that a fault does occur, all filters except the one using the correct hypothesis will produce large estimation errors, thereby isolating the specific fault. In the meantime, a set of parameters that indicate engine component performance is estimated for the detection of abrupt degradation. The proposed FDI approach is applied to a nonlinear engine simulation at nominal and aged conditions, and the evaluation results for various engine faults at cruise operating conditions are given. The ability of the proposed approach to reliably detect and isolate sensor and actuator faults is demonstrated. (7 tables, 4 figures, 17 refs.).
Book Synopsis 37th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit by :
Download or read book 37th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit written by and published by . This book was released on 2001 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computational Intelligence in Fault Diagnosis by : Vasile Palade
Download or read book Computational Intelligence in Fault Diagnosis written by Vasile Palade and published by Springer Science & Business Media. This book was released on 2006-12-22 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the most recent concerns and research results in industrial fault diagnosis using intelligent techniques. It focuses on computational intelligence applications to fault diagnosis with real-world applications used in different chapters to validate the different diagnosis methods. The book includes one chapter dealing with a novel coherent fault diagnosis distributed methodology for complex systems.
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781724090560 Total Pages :30 pages Book Rating :4.0/5 (95 download)
Book Synopsis Artificial Neural Networks Applications by : National Aeronautics and Space Adm Nasa
Download or read book Artificial Neural Networks Applications written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-27 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper reviews some of the recent applications of artificial neural networks taken from various works performed by the authors over the last four years at the NASA Glenn Research Center. This paper focuses mainly on two areas. First, artificial neural networks application in design and optimization of aircraft/engine propulsion systems to shorten the overall design cycle. Out of that specific application, a generic design tool was developed, which can be used for most design optimization process. Second, artificial neural networks application in monitoring the microgravity quality onboard the International Space Station, using on-board accelerometers for data acquisition. These two different applications are reviewed in this paper to show the broad applicability of artificial intelligence in various disciplines. The intent of this paper is not to give in-depth details of these two applications, but to show the need to combine different artificial intelligence techniques or algorithms in order to design an optimized or versatile system. Jules, Kenol and Lin, Paul P. Glenn Research Center NASA/TM-2002-211811, E-13505, NAS 1.15:211811
Download or read book Research and Technology 2001 written by and published by . This book was released on 2002 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cascade Optimization for Aircraft Engines With Regression and Neural Network Analysis - Approximators by :
Download or read book Cascade Optimization for Aircraft Engines With Regression and Neural Network Analysis - Approximators written by and published by . This book was released on 2000 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aircraft Engine Sensor/Actuator/Component Fault Diagnosis Using a Bank of Kalman Filters by :
Download or read book Aircraft Engine Sensor/Actuator/Component Fault Diagnosis Using a Bank of Kalman Filters written by and published by . This book was released on 2003 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An integrated architecture for aircraft engine performance monitoring and fault diagnostics by : Aidan W. Rinehart
Download or read book An integrated architecture for aircraft engine performance monitoring and fault diagnostics written by Aidan W. Rinehart and published by . This book was released on 2015 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
