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Articles 121 - 150 of 412
Full-Text Articles in Aviation
Product Development Process For Small Unmanned Aerial Systems, Jonathan D. Poole
Product Development Process For Small Unmanned Aerial Systems, Jonathan D. Poole
Theses and Dissertations
The DoD has recognized the need for persistent Intelligence, Surveillance and Reconnaissance (ISR) over the last two decades. Recent developments with commercial drones have changed the market structure; there is now a thriving and extensive market base for drone based remote sensing. This research provides system engineering methods to support the DoD use of this burgeoning market to meet operational ISR needs. The three contributions of this research are: a process to support Small Unmanned Aerial Systems (SUAS) design, tools to support the design process, and tools to support risk assessment and reduction for both design and operations. The process …
United States Air Force Applications Of Unmanned Aerial Systems (Uas): A Delphi Study To Examine Current And Future Uas Autonomous Mission Capabilities, Alberto Sigala
Theses and Dissertations
As UAS technology continues to grow and enable increased autonomous capabilities, acquisition and operational decision makers must determine paths to pursue for existing and emerging mission areas. The DoD has published a number of 25-year unmanned systems integration roadmaps (USIR) to describe future capabilities and challenges. However, these roadmaps have lacked distinguishable stakeholder perspectives. Following the USIRs concept, this research focused on UAS autonomy through the lens of UAS subject matter experts (SMEs). We used the Delphi method with SMEs from USAF communities performing day-to-day operations, acquisitions, and research in UAS domains to forecast mission capabilities over the next 20 …
Multi-Path Automatic Ground Collision Avoidance System For Performance Limited Aircraft With Flight Tests: Project Have Medusa, Kenneth C. Gahan
Multi-Path Automatic Ground Collision Avoidance System For Performance Limited Aircraft With Flight Tests: Project Have Medusa, Kenneth C. Gahan
Theses and Dissertations
A multi-path automatic ground collision avoidance system (Auto-GCAS) for performance limited aircraft was further developed and improved to prevent controlled flight into terrain. This research includes flight test results from the United States Test Pilot School's Test Management Project (TMP) titled Have Multi-Path Escape Decisions Using Sophisticated Algorithms (MEDUSA). Currently, the bomber and mobility air- craft communities lack an Auto-GCAS. The F-16 Auto-GCAS was proven successful for fighter-type aircraft with seven aircraft and eight lives saved from 2014 to 2018. The newly developed and tested Rapidly Selectable Escape Trajectory (RSET) sys- tem included a 5-path implementation which continuously updated at …
Simulation And Piloted Simulator Study Of An Automatic Ground Collision Avoidance System For Performance Limited Aircraft, James D. Carpenter
Simulation And Piloted Simulator Study Of An Automatic Ground Collision Avoidance System For Performance Limited Aircraft, James D. Carpenter
Theses and Dissertations
The F-16 Automatic-Ground Collision Avoidance System (Auto-GCAS) has been a resounding success since implementation in Nov 2014, saving 8 pilots and 7 aircraft from Controlled Flight into Terrain (CFIT). However, there is no implemented Auto- GCAS for "heavy" performance limited aircraft. This research endeavors to expand on the success of F-16 Auto-GCAS to other aircraft in the Air Force inventory such as the C-130, C-17, and B-1. MIL-STD-1797 classifies performance limited aircraft as large, heavy, and low to medium maneuverability. Using a stitched Learjet-25D model (LJ-25D), an Auto-GCAS algorithm was developed to predict multiple escape-maneuver trajectories, compare these paths to …
Examining The Drivers Of C-130j Maintenance Requirements Through Multiple Regression Analysis, Andrew V. Gill
Examining The Drivers Of C-130j Maintenance Requirements Through Multiple Regression Analysis, Andrew V. Gill
Theses and Dissertations
As a result of increasing system complexity and cost, new aircraft acquisition, upgrade and repair timelines continue to lengthen. As a result, aircraft are kept in service longer than originally intended. Therefore, age-related wear continues to play a large part in determining mission-capable status, and therefore, aircraft availability (AA) rates. Combined with decreasing fleet sizes and manpower resource pools, each aircraft declared not mission capable (NMC) exerts an out-sized influence upon fleet AA rates. This research used multiple regression analysis to identify and quantify the effects of age, Major Command (MAJCOM) and operating location ambient weather on unscheduled not mission …
Assessing Artificial Agent Response Time Effects On Human-Agent Teams In Variable Inter-Arrival Time Environments, David J. Canzonetta
Assessing Artificial Agent Response Time Effects On Human-Agent Teams In Variable Inter-Arrival Time Environments, David J. Canzonetta
Theses and Dissertations
Autonomous systems have gained an expanded presence within the Department of Defense (DoD). Furthermore, the DoD has clearly stated autonomous systems must extend the capabilities of their human operators. Thus, the exploration of strategies for effective pairing of humans and automation supports this vision. Previous research demonstrated that the time at which an automated agent assumes a task for its human teammate, or agent response time (ART), affects human-agent team performance, human engagement, and human workload. However, in this research environment, the time between subsequent tasks appearing to the human-agent team, or inter-arrival time (IAT), remained constant. Variable IAT environments …
Evaluation Of Unmanned Aircraft Flying Qualities Using A Stitched Learjet Model, Patrick M. Callaghan
Evaluation Of Unmanned Aircraft Flying Qualities Using A Stitched Learjet Model, Patrick M. Callaghan
Theses and Dissertations
In recent years, military UAVs have taken over missions that were too dull, dirty, or dangerous for manned aircraft. The increased demand has led to a build-fly-fix-fly development mentality, plaguing the early lifecycle with staggering mishap rates. Currently, MIL-STD-1797 lists flying qualities for UAVs as TBD, and the standards for manned fixed wing are inadequate when applied to UAVs. In an effort to expand the database of UAV flying qualities, an analysis was completed on a Simulink model of an LJ-25D developed from Calspans Variable Stability System aircraft at the United States Test Pilot School. Three maneuvers were simulated: (1) …
Implementation Of Music In A Simulated Unmanned Aircraft System (Uas) Monitoring Task To Alleviate The Vigilance Decrement, Maria Chaparro
Implementation Of Music In A Simulated Unmanned Aircraft System (Uas) Monitoring Task To Alleviate The Vigilance Decrement, Maria Chaparro
Theses and Dissertations
The vigilance decrement is a thoroughly researched phenomenon in psychological literature and has been identified in many monotonous tasks. Although the phenomenon has been recorded for approximately 80 years, no universal repair, or theory to account for its onset, has been identified. Jobs requiring monotonous task performance have been increasing as time has elapsed, in part due to the rise in automation. Furthermore, much of the vigilance literature does not address modern, more complex tasks, such as the Unmanned Aerial Systems (UAS) monitoring task. A potential method that has been proposed to combat the vigilance decrement is the inclusion of …
Evaluation Of Rsaf Airworthiness And Applicability, Majed M. Altowairqi
Evaluation Of Rsaf Airworthiness And Applicability, Majed M. Altowairqi
Theses and Dissertations
This research focuses on evaluation of Royal Saudi Air Force (RSAF) airworthiness processes and their applicability. The current RSAF airworthiness process is in accordance with internationally recognized best practice in the area of military aviation, this is achieved by benchmarking against European Aviation Safety Agency (EASA) and International Organization for Standardization (ISO) standards. Airworthiness policy for the RSAF is developed on the basis that it will be as civil as possible and as military as necessary. For the purpose of this research, the current RSAF airworthiness process will be benchmarked against the United States Air Force (USAF) airworthiness process. That …
Flightline Simulation Model Of A Squadron, Huseyin Mert
Flightline Simulation Model Of A Squadron, Huseyin Mert
Theses and Dissertations
Military flight training is a long and costly process. Ensuring that the training aircraft are ready for flight is critical in processing pilots through training courses on schedule. Maintaining a high mission capable rate for training aircraft requires scheduled periodic maintenance and maintenance between sorties. Aircraft Ground Equipment (AGE) is used to service each aircraft to make it ready for the following flight. Having a sufficient amount of AGE available is critical, as cancelling or delaying sorties due to lack of AGE generally has a significant impact on the training schedule. This work analyzes the AGE support equipment used in …
Employees Attitudes Toward Safety Risk Management And Safety Performance At U.S. Airports, Umut Oztekin
Employees Attitudes Toward Safety Risk Management And Safety Performance At U.S. Airports, Umut Oztekin
Theses and Dissertations
Increasing air transportation traffic around the world initiated authorities to take new safety measures into consideration. In 2010, the Federal Aviation Administration (FAA) issued a Notice of Proposed Rulemaking to introduce Safety Management Systems (SMS) to the airport community (FAA, 2016). Throughout the years, the FAA has introduced SMS as a 4-pillar system for airports to provide a systematic approach to identify hazards, mitigate risks, increase safety performance, enhance reporting systems, and increase communication systems. It is advised by the FAA that airport employees should confidently speak up and report safety related incidents for further development of airport safety. The …
Impact Of Computer Tablets On General Aviation Flight Training, Anthony Saitabau Lolchoki
Impact Of Computer Tablets On General Aviation Flight Training, Anthony Saitabau Lolchoki
Theses and Dissertations
Over the past two decades, Electronic Flight Bags (EFBs) and Personal Electronic Devices (PEDs) have developed from flight publication storage devices hosted on modified laptop computers into fully interactive near-avionics-quality navigation equipment based on consumer-grade tablet computers. Broadly speaking, the Code of Federal Regulation (CFR) 14 regulates the use of this type of equipment for commercial airlines, commuter operations, and fractional ownership operators, but have neglected the General Aviation (GA) sector. Due, in part, to this lack of governance, little has been known about EFB use in GA. After using an internet-based survey, this study was conducted to examine whether …
Positive Experiences As Countermeasures To Stress In Spaceflight: An Investigation Of The Experiences Of Astronauts, Morgan M. Eudy
Positive Experiences As Countermeasures To Stress In Spaceflight: An Investigation Of The Experiences Of Astronauts, Morgan M. Eudy
Theses and Dissertations
Long-duration space mission targets such as asteroids, the Moon and Mars in coming years will increase the need to stress management techniques to support crews on increasingly risky, autonomous missions. New stress management approaches may be found by better understanding the reported positive effects resulting from factors in these environments. This study utilized an exploratory case study approach to leverage quantitative and qualitative data to yield research questions for future correlational analysis. This study found that positive experiences and changes in environmental perspectives occurred from viewing Earth from orbit. Furthermore, this study found that personality factors such as extraversion may …
Assessment Of The Evolving Low-Cost Business Model For The Future Importance Of U.S. Secondary Airports, Nurettin Dinler
Assessment Of The Evolving Low-Cost Business Model For The Future Importance Of U.S. Secondary Airports, Nurettin Dinler
Theses and Dissertations
Airline deregulation caused a profound reshape in the aviation industry. The liberalization of the aviation sector resulted in a favorable environment for the emergence of low-cost carriers (LCCs). Following deregulation, airlines saw many attempts at their business strategies to gain more passengers in air transportation market. To capture additional market shares of passenger traffic, the business models of LCCs have evolved to mirror the more common business models employed by the traditional legacy airlines. The purpose of this study was to examine what effect, if any, exists between LCCs’ market share of passenger enplanements at secondary airports and their business …
Effects Of Verbal Vs Graphical Weather Information On A Pilots Decision-Making During Preflight, Warren Phillip Pittorie
Effects Of Verbal Vs Graphical Weather Information On A Pilots Decision-Making During Preflight, Warren Phillip Pittorie
Theses and Dissertations
Before a general aviation pilot conducts a flight, they obtain a preflight weather briefing that shares information on possible hazards along the intended route of flight. These preflight weather briefings are typically obtained either verbally, via a narrative delivered over a telephone, or visually, where graphical and textual information is presented on a computer or tablet display. This study compared verbal and graphical/textual weather briefings in a within-subjects study that altered the order in which participants received each format. Thirty-six participants were given a survey that contained two flight scenarios, each with specific weather scenarios and a specific briefing format. …
Pilots’ Likelihood To Quit Flying In Part 121 Commercial Aviation, Gajapriya Tamilselvan
Pilots’ Likelihood To Quit Flying In Part 121 Commercial Aviation, Gajapriya Tamilselvan
Theses and Dissertations
The purpose of the study was to develop a statistical model representing predictors to anticipate pilots’ likelihood to quit flying in Part 121 Commercial Aviation. The study was primarily focused on the current Part 121 pilots in the United States. The study was designed with a correlational methodology and multiple linear regression was employed as the statistical procedure to analyze the data collected from diverse sources. The sample of the study consists of 163 participants (33 females), and all of them currently working for either major or regional airline in the United States respectively. Simultaneous regression strategy was used to …
Managing Supply Discrepancies: The Effect Of Performance Measurement And Feedback On Order Fulfillment Quality, Michael J. Weber
Managing Supply Discrepancies: The Effect Of Performance Measurement And Feedback On Order Fulfillment Quality, Michael J. Weber
Theses and Dissertations
Extensive research on the impact of shipping and packaging errors in the private sector finds numerous negative outcomes, including reduced customer satisfaction, reduced customer loyalty, and lower profitability. However, little research has been done examining the impact of order fulfillment errors on military operations. The purpose of this research is to quantify the impact of supply discrepancy reports (SDRs) on military aircraft readiness metrics, including cannibalizations, not mission capable supply (NMCS) hours, aircraft availability and MICAP hours. Results show SDRs significantly impact aircraft readiness metrics in seven of the fifteen analyses conducted. Additionally, a quasi-experimental study is implemented at DLA …
United States Air Force Applications Of Unmanned Aerial Systems: Modernizing Airfield Damage Assessment, Samuel M. Clark
United States Air Force Applications Of Unmanned Aerial Systems: Modernizing Airfield Damage Assessment, Samuel M. Clark
Theses and Dissertations
Modernizing airfield damage assessment has long been a priority mission at the Air Force Civil Engineer Center (AFCEC). Previously, AFCEC has made advances to expedite unexploded ordnance (UXO) neutralization and pavement repair. Missing from these initiatives is the initial assessment component. This thesis expands the idea of using Small Unmanned Aerial Systems (SUAS), applies it to the Air Force mission, and provides SUAS vehicle configuration and sensor recommendations. In this study, 25 civil engineer officers reviewed airfield imagery gathered using two small air vehicles. For the first review, participants attempted to identify UXOs and foreign object debris (FOD) in a …
Flightline Heroics And The Façade Of A Healthy Common Support Equipment Fleet, Benjamin D. Bobic
Flightline Heroics And The Façade Of A Healthy Common Support Equipment Fleet, Benjamin D. Bobic
Theses and Dissertations
Access to serviceable support equipment enables aircraft maintenance crews the ability to efficiently keep assigned aircraft safe and mission capable. Current Air Force policy does not require formal management and enterprise fleet health reporting of serialized support equipment. As such, articulating funding requirements to replace equipment has been a challenge for equipment managers. To better articulate support equipment requirements, equipment managers need quantifiable support equipment data. A previous study examined the relationship between aircraft availability and support equipment availability. While finding no significant correlation, the author identifies the practices of "Frankensteining" and "Beg-Borrow-Steal" as possible reasons for the absence of …
An Analysis Of Aircraft Operating And Support Cost Element Structures, Garrett B. O'Hanlon
An Analysis Of Aircraft Operating And Support Cost Element Structures, Garrett B. O'Hanlon
Theses and Dissertations
As the cost of DoD Weapon Systems continue to increase, the ability to more accurately predict the Operating and Support (O&S) costs for the various weapon systems has become more vital for long run affordability. The investigation into the O&S arena has been overshadowed by the research and development (R&D) and acquisition fields. This research focuses on the O&S portion of the total life cycle costs, specifically the OSD-CAPE Cost Element Structure (CES) elements and sub-elements. The research investigates seven categories of 52 aircrafts and their cost expenditures within the CES from the years 1996-2016. The first portion of the …
Demonstration Of Head Mounted Displays And Its Effects On Situational Awareness, Adam Richard Goetz
Demonstration Of Head Mounted Displays And Its Effects On Situational Awareness, Adam Richard Goetz
Theses and Dissertations
In this investigation, I discussed the use of Head-Mounted Displayed (HMD) Augmented Reality and its effects on a driver’s Situational Awareness (SA) while observing two driving scenarios. In this study I showed participants two videos, one with a simulated HMD and one without. Throughout the video, the participants were asked questions about their environment to see if they can retain information presented to them. This included the current speed of the vehicle, the next navigation direction, how many cars are surrounding the vehicle, and several others. These questions will give insight into the participant’s SA. This method is called the …
The Psychological Health Of Airline Pilots: A Flight Deck Crew’S Perceptions And Willingness To Fly, Jason Charles Herkimer
The Psychological Health Of Airline Pilots: A Flight Deck Crew’S Perceptions And Willingness To Fly, Jason Charles Herkimer
Theses and Dissertations
Pilots have an image of bravado and charisma which includes that of a hardened, unemotional professional. What happens when the inevitable hardship occurs to a pilot? In the past, physical attributes were highly sought after in the recruitment of pilots. Eventually, pilots can and will suffer from the same psychological stressors as the general population. The purpose of this study is to determine the effect stigmatizing attitudes and psychological treatment of pilots have on a flight deck crew’s willingness to fly. The current study incorporated several different methodologies including a between subjects true experimental, an analysis of covariance (ANCOVA), an …
Development And Investigation Of An Air Transportation Operations Safety Climate Scale, Matthew D. Roberts
Development And Investigation Of An Air Transportation Operations Safety Climate Scale, Matthew D. Roberts
Theses and Dissertations
Safety is of critical importance in many industries, and the US Air Force is no exception. Since 2005, the US Air Force has experienced more than 119 on-duty air and ground fatalities as well as 520 off-duty ground fatalities. One of the more dangerous environments in the U.S. Air Force and the civilian industry is air transportation operations where the fatal injury rate is higher than the national average. However, peer-reviewed safety research focusing on air transportation operations is practically non-existent, both in the military and civilian context. Therefore, safety research that helps us better understand how to shape safety …
A Prediction Model Of Airline Passenger Preference: Identifying Factors That Predict Passenger Preference Between Low Cost And Legacy Carriers., Rian Mahiar Mehta
A Prediction Model Of Airline Passenger Preference: Identifying Factors That Predict Passenger Preference Between Low Cost And Legacy Carriers., Rian Mahiar Mehta
Theses and Dissertations
The purpose of the study was to identify factors that influence a commercial airline passenger’s preference between low-cost and legacy airline carriers. In turn a prediction model of passenger preference was created for American travelers. The study utilized a correlational design with linear multiple regression analyses as the statistical analyses to build the prediction model. The study was conducted in two stages utilizing two independent samples totaling 936 participants (379 females), all from the United States. Data from the first sample was used to create the regression equation for passenger preference. Data from the second sample was used to test …
Consumers’ Willingness To Fly In Augmented Cognition Equipped Aircraft, Eric Schanafelt
Consumers’ Willingness To Fly In Augmented Cognition Equipped Aircraft, Eric Schanafelt
Theses and Dissertations
Current advancements in the field of Augmented Cognition have garnered attention from the aviation industry. Equipping flight management systems with Augmented Cognition is a possibility in the near future as the result of recent computing breakthroughs. The purpose of this study was to determine to what extent gender, country of origin and condition of Augmented Cognition affect consumers willingness to fly. To further understand the consumer's decision-making process the participant’s willingness to fly measured through affect (emotion), represented through the six universal facial expressions, (anger, disgust, fear, happiness, sad, and surprise) (Ekman & Friesen, 1971). This study surveyed participants from …
A Comparison Of Airline Passengers' Perception And Attention Toward Onboard Safety Briefing Video Presentations, Yousef Aba Alkhail
A Comparison Of Airline Passengers' Perception And Attention Toward Onboard Safety Briefing Video Presentations, Yousef Aba Alkhail
Theses and Dissertations
The purpose of this study is to determine the effect of the type of safety demonstration on a passenger's perception and attention. Furthermore, the study examined if there are gender differences based on participant gender. The design utilizes a two-study approach. Study 1 used Florida Tech College of Aeronautics students. For Study 1, the design for Florida Tech Aeronautics students was a mixed design using one within subjects variable and one between subjects variable. This study was a nonrandomized, posttest-only design. Experimental conditions were counterbalanced. The ANOVA analysis of Study 1 demonstrated that there was no significant interaction between gender …
Consumers’ Level Of Trust In Using An Automated Train, Aircraft, Or Vehicle As A Transportation Means, Vivalda Alexandra Patin
Consumers’ Level Of Trust In Using An Automated Train, Aircraft, Or Vehicle As A Transportation Means, Vivalda Alexandra Patin
Theses and Dissertations
Automation is a growing technology within most industries. It is expected that automated systems may replace human functions in the near future. The purpose of this study was to determine whether factors such as: type of passenger, type of transportation, and type of operating system have an effect on consumers’ level of trust when it comes to automation in terms of transportation. In order to accomplish this task, an experimental study was conducted with 735 participants who were recruited via Amazon’s ® Mechanical Turk ®. The study provided participants with a questionnaire where they were presented with different scenarios such …
Exploring Usability In Web-Based Aviation Weather: An Assessment Of The Aviation Weather Center Website, Benjamin Remy
Exploring Usability In Web-Based Aviation Weather: An Assessment Of The Aviation Weather Center Website, Benjamin Remy
Theses and Dissertations
To provide a starting point for usability research in the area of online aviation weather, we performed a two-part usability study of the popular Aviation Weather Center website for general aviation users. The first part of the study utilized the System Usability Scale to examine different types of weather information as used by a general aviation pilot on a VFR cross-country flight and compare the usability of the information to an existing benchmark. No scores were significantly less than the benchmark, but the ordering of weather information by usability score provided valuable insight into the relationship between usability and pilot …
Symbol Salience Affects Change Detection Performance In General Aviation Weather Displays, Adam A. Hruszczyk
Symbol Salience Affects Change Detection Performance In General Aviation Weather Displays, Adam A. Hruszczyk
Theses and Dissertations
General aviation pilots perform many tasks during a flight such as navigating a route, performing 'see and avoid', operating the radio and navigational instruments, viewing charts and approach plates, and scanning and interpreting their flight instruments. In addition to these tasks, pilots may utilize a cockpit weather presentation to monitor weather information for areas along the route of flight. Due to the complexity of most modern weather displays, information changes may go unnoticed. The objective of this study was to examine how saliency characteristics such as line color, thickness, and orientation affected an observer’s change detection performance and response time. …
The Effects Of Laser Eye Protection On Color Recognition And Discrimination, Sherisse Melanie Pierre
The Effects Of Laser Eye Protection On Color Recognition And Discrimination, Sherisse Melanie Pierre
Theses and Dissertations
The number of reported laser strikes on aircraft has increased over the years. Laser strikes pose a threat to safety and thus, warrant attention and mitigation efforts. Laser Eye Protection (LEP) is one mitigation method available to pilots; however, LEP can affect a person’s color vision. When wearing the LEP pilots should be able to retain sufficient color recognition and discrimination abilities. This exploratory study investigates the effect of LEP on color recognition and discrimination of four colors, red, blue, green, and amber, using a sample of 90 participants. When using the LEP the majority of participants were able to …