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Modeling Of Jet Engine Abnormal Conditions And Detection Using The Artificial Immune System Paradigm, Jaclyn Marie Porter
Modeling Of Jet Engine Abnormal Conditions And Detection Using The Artificial Immune System Paradigm, Jaclyn Marie Porter
Graduate Theses, Dissertations, and Problem Reports
Previous research at WVU has yielded promising results in the detection of aircraft sub-systems malfunctions using the artificial immune system (AIS) paradigm. However, one aircraft component that requires improvement is the aircraft propulsion system. In this research effort, MAPSS, a non-real time low-bypass turbofan engine model distributed by NASA, has been linearized and interfaced with the WVU F-15 model and the WVU 6 degrees-of-freedom flight simulator to provide a more complex engine model and create more options for engine failure modeling and engine failure detection. A variety of engine actuator and sensor failures were modeled and implemented into the simulation …
Immunity-Based Detection, Identification, And Evaluation Of Aircraft Sub-System Failures, Hever Y. Moncayo
Immunity-Based Detection, Identification, And Evaluation Of Aircraft Sub-System Failures, Hever Y. Moncayo
Graduate Theses, Dissertations, and Problem Reports
This thesis describes the design, development, and flight-simulation testing of an integrated Artificial Immune System (AIS) for detection, identification, and evaluation of a wide variety of sensor, actuator, propulsion, and structural failures/damages including the prediction of the achievable states and other limitations on performance and handling qualities. The AIS scheme achieves high detection rate and low number of false alarms for all the failure categories considered. Data collected using a motion-based flight simulator are used to define the self for an extended sub-region of the flight envelope. The NASA IFCS F-15 research aircraft model is used and represents a supersonic …
Computational Environment For The Development Of An Faa Compliant Level 6 Flight Training Device, Steven Mullins
Computational Environment For The Development Of An Faa Compliant Level 6 Flight Training Device, Steven Mullins
Graduate Theses, Dissertations, and Problem Reports
A flight simulator can successfully achieve its purpose only if equipped with adequate mathematical models of the aircraft, its sub-systems, and the environment. The US Federal Aviation Administration (FAA) has instituted stringent regulations to ensure that flight simulators used for pilot training reach desirable levels of accuracy and fidelity. The purpose of this thesis is to present the development and application of a design strategy and the computational environment associated to it for building an aircraft simulation model that meets the FAA regulations for flight simulator performance. The proposed methodology is based on using flight test data in combination with …
Aerodynamic Design Of A Tilting Wind Tunnel For The Study Of A Glider In Ground Effect, Andres Felipe Velasquez E.
Aerodynamic Design Of A Tilting Wind Tunnel For The Study Of A Glider In Ground Effect, Andres Felipe Velasquez E.
Graduate Theses, Dissertations, and Problem Reports
A small, low-speed, open return, tilting wind tunnel has been designed. This wind tunnel is intended to simulate the behavior of an unpowered recreational glider that flies down slopes in ground effect at about 1m above the surface. The required tilting angle is 50°. The wind tunnel has to be capable of holding free-flying models with a recommended scaling factor of 14.2 and with Froude number matching.;The designed wind tunnel uses a centrifugal fan to blow air into the test section through a wide angle diffuser, a settling chamber and a contraction. There are six screens and a honeycomb to …
Transient Flow Characteristics Of A High Speed Rotary Valve, Patrick H. Browning
Transient Flow Characteristics Of A High Speed Rotary Valve, Patrick H. Browning
Graduate Theses, Dissertations, and Problem Reports
Pressing economic and environmental concerns related to the performance of fossil fuel burning internal combustion engines have revitalized research in more efficient, cleaner burning combustion methods such as homogeneous charge compression ignition (HCCI). Although many variations of such engines now exist, several limiting factors have restrained the full potential of HCCI. A new method patented by West Virginia University (WVU) called Compression Ignition by Air Injection (CIBAI) may help broaden the range of effective HCCI operation. The CIBAI process is ideally facilitated by operating two synchronized piston-cylinders mounted head-to-head with one of the cylinders filled with a homogeneous mixture of …
Development And Evaluation Of A Fault Detection And Identification Scheme For The Wvu Yf-22 Uav Using The Artificial Immune System Approach, Sebastian Pablo Sanchez
Development And Evaluation Of A Fault Detection And Identification Scheme For The Wvu Yf-22 Uav Using The Artificial Immune System Approach, Sebastian Pablo Sanchez
Graduate Theses, Dissertations, and Problem Reports
A failure detection and identification (FDI) scheme is developed for a small remotely controlled jet aircraft based on the Artificial Immune System (AIS) paradigm. Pilot-in-the-loop flight data are used to develop and test a scheme capable of identifying known and unknown aircraft actuator and sensor failures. Negative selection is used as the main mechanism for self/non-self definition; however, an alternative approach using positive selection to enhance performance is also presented. Tested failures include aileron and stabilator locked at trim and angular rate sensor bias. Hyper-spheres are chosen to represent detectors. Different definitions of distance for the matching rules are applied …
An Investigation Into The Theoretical And Analytical Basis For The Spread Of Airborne Influenza, John B. Redrow
An Investigation Into The Theoretical And Analytical Basis For The Spread Of Airborne Influenza, John B. Redrow
Graduate Theses, Dissertations, and Problem Reports
With the threat of a pandemic drawing near and the possibility of a "new", more deadly, form of the influenza virus from genetic re-assortment of avian and human influenza viruses, there is dire need for a better understanding of the transmission mechanisms of this virus. The present study focuses on the aerosol mode of transmission, particularly via the mechanism of human cough. Utilizing computational fluid dynamics (CFD), an in-house code was developed to model the transport of a sputum droplet (cough expectorant) within a jet of air (representative of a human cough). A parametric study was conducted using the model, …
Circulation Control Improvements To Rotor Lift Asymmetry Due To Reverse Flow, Michael J. Lyons
Circulation Control Improvements To Rotor Lift Asymmetry Due To Reverse Flow, Michael J. Lyons
Graduate Theses, Dissertations, and Problem Reports
Circulation control has been applied to airfoils since the late 1960's, and has been proven to change the aerodynamic performance by altering the interaction of the streamlines without changing the physical characteristics of the airfoil itself. This has many applications in fluid dynamics; the focus of this application is for the replacement of the conventional helicopter rotor blade system with a fly-by-wire, active circulation controlled system. Conventional helicopters use a swashplate and a series of mechanical linkages, bearings, and dampers to create a fully articulated rotor hub system. This system is required to achieve the blade characteristics required for stable …