Дисертації з теми "Aircraft Thermal Management Systems"
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Reed, William Cody. "Comparison of Heat Exchanger Designs for Aircraft Thermal Management Systems." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/75142.
Повний текст джерелаMaster of Science
Tipton, Austin L. "Simulation, Experimentation, Control and Management of a Novel Fuel Thermal System." Wright State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=wright1578320719632833.
Повний текст джерелаMaser, Adam Charles. "Optimal allocation of thermodynamic irreversibility for the integrated design of propulsion and thermal management systems." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45913.
Повний текст джерелаThomas, Kevin P. "System architecture for real time power management." Thesis, University of Bristol, 1996. http://hdl.handle.net/1983/b4d196a1-d1f8-4141-b6e3-a32eb4f2073f.
Повний текст джерелаJones, Andy. "Component-led integrative optimisation methodology for avionic thermal management." Thesis, Loughborough University, 2017. https://dspace.lboro.ac.uk/2134/24785.
Повний текст джерелаLammers, Zachary A. "Thermal Management of Electromechanical Actuation System for Aircraft Primary Flight Control Surfaces." University of Dayton / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1399021324.
Повний текст джерелаAllen, Christopher T. "Global Optimization of an Aircraft Thermal Management System through Use of a Genetic Algorithm." Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1220969610.
Повний текст джерелаPayne, Nathaniel M. "Development of a Combined Thermal Management and Power Generation System using a Multi-Mode Rankine Cycle." Wright State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=wright1622657194320193.
Повний текст джерелаButt, Nathaniel J. "Development and Thermal Management of a Dynamically Efficient, Transient High Energy Pulse System Model." Wright State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright1527602141695356.
Повний текст джерелаKhanna, Yash. "Conceptual design and development of thermal management system for hybrid electric aircraft engine. : A study to develop a physical model and investigate the use of Mobil Jet Oil II as coolant for aircraft electrical propulsion under different scenarios and time horizons." Thesis, Mälardalens högskola, Framtidens energi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-46612.
Повний текст джерелаFleming, Andrew J. "Aircraft Thermal Management Using Loop Heat Pipes." Wright State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=wright1238086423.
Повний текст джерелаNuzum, Sean Robert. "Aircraft Thermal Management using Liquefied Natural Gas." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1462460693.
Повний текст джерелаDonovan, Adam. "Vehicle Level Transient Aircraft Thermal Management Modeling and Simulation." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1472236965.
Повний текст джерелаSermeno, Mena Salvador. "Vehicle thermal management control systems." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0052.
Повний текст джерелаThe increasing complexity of engine cooling systems results in added interactions and disturbances to the performance. Besides, non-propulsion loads (fan, water pump…) draw a significant percentage of the engine’s power thus lowering the vehicle’s fuel efficiency. Recent studies have shown that by controlling components the efficiency can be improved by adjusting fan speed according to cooling needs, coolant flow, and oil flow. Currently, the Volvo group in order to optimize the performance of their truck’s cooling systems had installed new thermal management components. However, problems were found while testing control strategies and a better understanding of the interaction between components is required to prevent this from happening again. In this work, the bond graph approach has been applied for the study of the cooling system of a Heavy duty vehicle and has enabled subsystem interactions to be identified. Based on a simplified model issued from the bond graph, several control strategies have been built. These controllers are based on different control approaches: model predictive control, flatness control, model free control and model free control with reduced order model. These controllers were implemented in a simulation platform in the Matlab/Simulink environment. Results of the implementation of the new advanced control strategies are given. Fuel economy gains ranged between 0.5 and 0.9 %. A structural analysis of the current architecture is also proposed aiming at the optimization of the system. Given the insights from the analysis, an assessment of new concepts for the cooling system architecture is proposed
McFarlane, Alexander. "Biofilm development and management in aircraft fuel systems." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/17655/.
Повний текст джерелаCoşkun, Ayşe Kıvılcım. "Efficient thermal management for multiprocessor systems." Diss., [La Jolla] : University of California, San Diego, 2009. http://wwwlib.umi.com/cr/ucsd/fullcit?p3372516.
Повний текст джерелаTitle from first page of PDF file (viewed October 13, 2009). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 109-114).
Gibbons, Blake. "Safety Management Systems (SMS) for aircraft manufacturers and maintainers?" Thesis, Cranfield University, 2014. http://dspace.lib.cranfield.ac.uk/handle/1826/9213.
Повний текст джерелаDemus, Justin Cole. "Prognostic Health Management Systems for More Electric Aircraft Applications." Miami University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami1631047006902809.
Повний текст джерелаKreinar, David J. "Energy Management Techniques for Hybrid Electric Unmanned Aircraft Systems." University of Dayton / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=dayton159640308960136.
Повний текст джерелаThe'berge, Marc W. "Three case studies of management information systems." Thesis, Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA238310.
Повний текст джерелаThesis Advisor(s): Haga, William J. Second Reader: Zviran, Moshe. "September 1990." Description based on title screen as viewed on December 21, 2009. DTIC Identifier(s): Management Information Systems, Naval Operations, Data Bases, Instructional Materials, Decision Aids, Aviation Accidents, Antisubmarine Warfare, Naval Training, Local Area Networks, Theses. Author(s) subject terms: Case Studies, Database Management Systems, Local Area Networks, Decision Support. Includes bibliographical references. Also available in print.
Liu, Chih-Chun. "Dynamic thermal management in chip multiprocessor systems." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2913.
Повний текст джерелаDesai, Anand Hasmukh. "Thermal management of small scale electronic systems." Diss., Online access via UMI:, 2006.
Знайти повний текст джерелаHamedi, Mohammadreza. "Advanced thermal management of diesel aftertreatment systems." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/7059/.
Повний текст джерелаLawee, Ian P. (Ian Philip). "Reducing development cycle time for aircraft electrical wiring systems." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/11530.
Повний текст джерелаIncludes bibliographical references (p. 93-94).
by Ian P. Lawee.
M.S.
Santamaría, Barnadas Eduard. "Formal mission specification and execution mechanisms for unmanned aircraft systems." Doctoral thesis, Universitat Politècnica de Catalunya, 2010. http://hdl.handle.net/10803/6020.
Повний текст джерелаMost current commercial solutions, if not remotely piloted, rely on waypoint based flight control systems for their navigation and are unable to coordinate UAS flight with payload operation. Therefore, automation capabilities and the ability for the system to operate in an autonomous manner are very limited. Some motivators that turn autonomy into an important requirement include limited bandwidth, limits on long-term attention spans of human operators, faster access to sensed data, which also results in better reaction times, as well as benefits derived from reducing operators workload and training requirements.
Other important requirements we believe are key to the success of UAS in the civil domain are reconfigurability and cost-effectiveness. As a result, an affordable platform should be able to operate in different application scenarios with reduced human intervention.
To increase capabilities of UAS and satisfy the aforementioned requirements, we propose adding flight plan and mission management layers on top of a commercial off-the-shelf flight control system. By doing so, a high level of autonomy can be achieved while taking advantage of available technologies and avoiding huge investments. Reconfiguration is made possible by separating flight and mission execution from its specification.
The flight and mission management components presented in this thesis integrate into a wider hardware/software architecture being developed by the ICARUS research group.
This architecture follows a service oriented approach where UAS subsystems are connected together through a common networking infrastructure. Components can be added and removed from the network in order to adapt the system to the target mission.
The first contribution of this thesis consists, then, in a flight specification language that enables the description of the flight plan in terms of legs. Legs provide a higher level of abstraction compared to plain waypoints since they not only specify a destination but also the trajectory that should be followed to reach it. This leg concept is extended with additional constructs that enable specification of alternative routes, repetition and generation of complex trajectories from a reduced number of parameters.
A Flight Plan Manager (FPM) service has been developed that is responsible for the execution of the flight plan. Since the underlying flight control system is still waypoint based, additional intermediate waypoints are automatically generated to adjust the flight to the desired trajectory.
In order to coordinate UAS flight and payload operation a Mission Manager (MMa) service has also been developed. The MMa is able to adapt payload operation according to the current flight phase, but it can also act on the FPM and make modifications on the flight plan for a better adaption to the mission needs. To specify UAS behavior, instead of designing a new language, we propose using an in-development standard for the specification of state machines called State Chart XML.
Finally, validation of the proposed specification and execution elements is carried out with two example missions executed in a simulation environment. The first mission mimics the procedures required for inspecting navigation aids and shows the UAS performance in a complex flight scenario. In this mission only the FPM is involved. The second example combines operation of the FPM with the MMa. In this case the mission consists in the detection of hotspots on a given area after a hypothetical wildfire. This second simulation shows how the MMa is able to modify the flight plan in order to adapt the trajectory to the mission needs. In particular, an eight pattern is flown over each of the dynamically detected potential hot spots.
Lin, Jiang. "Thermal modeling and management of DRAM memory systems." [Ames, Iowa : Iowa State University], 2008.
Знайти повний текст джерелаBradley, Thomas Heenan. "Modeling, design and energy management of fuel cell systems for aircraft." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26592.
Повний текст джерелаCommittee Chair: Parekh, David; Committee Member: Fuller, Thomas; Committee Member: Joshi, Yogendra; Committee Member: Mavris, Dimitri; Committee Member: Wepfer, William. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Salah, Mohammad Hasan. "Nonlinear control strategies for advanced vehicle thermal management systems." Connect to this title online, 2007. http://etd.lib.clemson.edu/documents/1202409346/.
Повний текст джерелаMcMillin, Timothy Walter. "Thermal management solutions for low volume complex electronic systems." College Park, Md.: University of Maryland, 2007. http://hdl.handle.net/1903/7368.
Повний текст джерелаThesis research directed by: Dept. of Mechanical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Herrera, Jason (Jason Richard). "Evaluation of control systems for automated aircraft wing manufacturing." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82484.
Повний текст джерелаThis electronic version was submitted and approved by the author's academic department as part of an electronic thesis pilot project. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from department-submitted PDF version of thesis
Includes bibliographical references (p. 62-64).
The Boeing Company is looking to bring aircraft manufacturing technology into the 21st century. As part of this process, several projects have been started to develop the technologies required to achieve Boeing's vision for the future of aircraft manufacturing. To date, much of this work has focused on hardware, including robotic and other automation technologies. However, in order to use this hardware, a significant effort must also be made in the area of factory control and coordination. This thesis advances knowledge in this area by evaluating the suitability of different control system approaches for aircraft wing box assembly. First, general classes of control systems are discussed and several criteria are proposed for evaluating their performance in an aircraft manufacturing environment. The current wing box assembly process is then examined in order to develop simplified but representative task networks to which various algorithms can be applied. The Tercio algorithm, developed at MIT, is used to generate schedules for several problem structures of interest in order to characterize the algorithm's performance in this context. The Tercio algorithm is then benchmarked against the Aurora scheduling tool, showing that Tercio can generate more efficient schedules than Aurora, but at the cost of increased computation time. Next, management considerations with respect to product design, manufacturing technology development, and implementation associated with advanced manufacturing technologies are discussed. Finally, recommendations are provided for how Boeing can accelerate the development of useful and practical advanced, automated manufacturing systems.
by Jason Herrera.
S.M.
M.B.A.
Kuroda, Scott H. "Distribution of Conflict Detection of Aircraft for Next Generation Flight Management Systems." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/1043.
Повний текст джерелаBhatia, Padampat Chander. "Thermal Analysis of Lithium-Ion Battery Packs and Thermal Management Solutions." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1371144911.
Повний текст джерелаSmarra, Devin. "Thermal Management and Packaging Techniques for High Performance Electrical Systems." University of Dayton / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1591122977788952.
Повний текст джерелаKallinen, Valtteri A. "Collision risk modelling for unmanned aircraft separation and traffic management." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/232516/1/Valtteri_Kallinen_Thesis.pdf.
Повний текст джерелаPienaar, Leanne Jane. "Probabilistic conflict detection for commercial aircraft near airports." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97033.
Повний текст джерелаENGLISH ABSTRACT: Increasing air traffic and urbanisation has led to a cluttered airspace, particularly near airports, where both complex terrain and multiple moving obstacles are frequent. Accurately and efficiently predicting violations in safe separation criteria for commercial aircraft, a process called conflict detection, is therefore crucial in assessing risk associated with threats of collision. Existing avoidance systems in operation such as TCAS, EGPWS and ATC exhibit shortcomings, leaving room for uncertainty and possible conflict scenarios. A single on-board system capable of minimising errors in prediction would inform conflict resolution decisions more accurately as well as support the notion of free flight, an objective of next-generation air traffic management systems. This thesis investigates the viability of a modern algorithm, probability flow, as a method of probabilistic conflict detection for commercial aircraft in airport environments. Simulation results for realistic flight scenarios are presented in comparison with a ground-truth result obtained through Monte Carlo simulation. Observations are made regarding the suitability of probability flow for real-world application. It is found that probability flow is capable of calculating a tight upper bound to the probability of conflict quickly and accurately for most conflict scenarios. However, unreasonably large overestimates on the probability of conflict are obtained when flying parallel to an obstacle conflict region. This problem could lead to a high frequency of false alerts, particularly in aborted landing scenarios and at airports operating parallel runways. It is therefore advised that further research be conducted to resolve this problem before probability flow can be reliably implemented in an airport environment.
AFRIKAANSE OPSOMMING: Toenemende lugverkeer en verstedeliking het gelei tot ‘n deurmekaar lugruim, veral naby lughawens, waar beide komplekse terrein en verskeie bewegende struikelblokke gereeld voorkom. Akkuraat en doeltreffende voorspelling van oortredings in veilige skeidingskriteria vir kommersiële vliegtuie, naamlik konflik opsporing, is dus van kardinale belang in die beoordeling van die risiko wat verband hou met dreigemente van ‘n botsing. Bestaande vermyding stelsels in werking soos TCAS, EGPWS en ATC toon tekortkominge, wat ruimte laat vir onsekerheid en moontlike konflik scenario’s. ‘n Enkele aanboordstelsel, wat in staat is om foute in voorspelling te verminder, sou konflikresolusie besluite meer akkuraat in kennis stel, asook om die idee van vrye vlug te ondersteun, ‘n doelwit van toekomstige lugverkeer beheerstelsels. Hierdie tesis ondersoek die lewensvatbaarheid van ‘n moderne algoritme, waarskynlikheidsvloei, as ‘n metode van probabilistiese konflik opsporing vir kommersiële vliegtuie in die lughawens omgewing. Simulasie resultate vir realistiese vlug scenario’s word aangebied in vergelyking met ‘n grond-waarheid resultaat wat verkry word deur middel van Monte Carlo simulasie. Waarnemings word gemaak ten opsigte van die geskiktheid van waarskynlikheidsvloei vir die werklikheid. Dit is bevind dat waarskynlikheidsvloei in staat is om die berekening van ‘n stywe bogrens tot die waarskynlikheid van konflik vinnig en akkuraat te bepaal vir die meeste konflik scenario’s. Tog is daar ‘n onredelike groot oorskatting op die waarskynlikheid van konflik wat verkry word wanneer ‘n vliegtuig parallel met ‘n hindernis konflik streek vlieg. Hierdie probleem kan lei tot ‘n hoë frekwensie van valse waarskuwings, veral in mislukte landing scenario’s en by lughawens wat van parallel aanloopbane gebruik maak. Dit word dus aanbeveel dat verdere navorsing gedoen word om die probleem op te los voordat waarskynlikheidsvloei betroubaar in ’n lughawe omgewing geïmplementeer word.
Lusk, Parker Chase. "Vision-Based Emergency Landing of Small Unmanned Aircraft Systems." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/7029.
Повний текст джерелаWang, Yong. "Microfuidic technology for integrated thermal management micromachined synthetic jet /." Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04082004-180443/unrestricted/wang%5fyong%5f200312%5fphd.pdf.
Повний текст джерелаVakil, Sanjay S. (Sanjay Sridhar). "Analysis of complexity evolution management and human performance issues in commercial aircraft automation systems." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/9172.
Повний текст джерелаIncludes bibliographical references (p. 181-187).
Autoflight systems in the current generation of aircraft have been implicated in several recent incidents and accidents. A contributory aspect to these incidents may be the manner in which aircraft transition between differing behaviours or "modes." The current state of aircraft automation was investigated and the incremental development of the autoflight system was tracked through a set of aircraft to gain insight into how these systems developed. This process appears to have resulted in a system without a consistent global representation. In order to evaluate and examine autoflight systems, a "Hybrid Automation Representation" was developed. This representation was used to examine several specific problems known to exist in aircraft systems. Cyclomatic complexity is an analysis tool from computer science which counts the number of linearly independent paths through a program graph. This approach was extended to examine autoflight mode transitions modelled with the Hybrid Automation Representation. A survey was conducted of pilots to identify those autoflight mode transitions which airline pilots find difficult. The transitions identified in this survey were analyzed using cyclomatic complexity to gain insight into the apparent complexity of the autoflight system from the perspective of the pilot. Mode transitions which had been identified as complex by pilots were found to have a high cyclomatic complexity. Further examination was made into a set of specific problems identified in aircraft: the lack of a consistent representation of automation, concern regarding appropriate feedback from the automation, and the implications of physical limitations on the autoflight systems. Mode transitions involved in changing to and leveling at a new altitude were identified across multiple aircraft by numerous pilots. Where possible, evaluation and verification of the behaviour of these autoflight mode transitions was investigated via aircraft-specific high fidelity simulators. Three solution approaches to concerns regarding autoflight systems, and mode transitions in particular, are presented in this thesis. The first is to use training to modify pilot behaviours, or procedures to work around known problems. The second approach is to mitigate problems by enhancing feedback. The third approach is to modify the process by which automation is designed. The Operator Directed Process forces the consideration and creation of an automation model early in the design process for use as the basis of the software specification and training.
by Sanjay Sridhar Vakil.
Ph.D.
Corcoran, Evangeline Mae. "Monitoring and modelling vulnerable wildlife populations using remotely piloted aircraft systems and machine learning." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/212423/1/Evangeline_Corcoran_Thesis.pdf.
Повний текст джерелаLoeffler, Benjamin Haile. "Modeling and optimization of a thermosiphon for passive thermal management systems." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45960.
Повний текст джерелаCacciari, Matteo <1984>. "Model predictive control in thermal management of multiprocessor systems-on-chip." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5771/.
Повний текст джерелаBergman, Emma. "Designing Thermal Management Systems For Lithium-Ion Battery Modules Using COMSOL." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-241899.
Повний текст джерелаWolfe, Neil A. "Development of a Tailored Flight Test Approach for small Unmanned Aircraft Systems." DigitalCommons@CalPoly, 2019. https://digitalcommons.calpoly.edu/theses/2073.
Повний текст джерелаWang, Yong. "Microfluidic technology for integrated thermal management: micromachined synthetic jet." Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/5438.
Повний текст джерелаXia, YuXin M. B. A. Sloan School of Management. "M28 Fixed wing transport aircraft cost reduction." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/66038.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 146-148).
The M28 is a Polish short-takeoff-and-landing (STOL) light cargo aircraft developed in 1984 and currently built by PZL Mielec, a subsidiary of United Technology Corporation (UTC). There has been renewed interest in the product from military and commercial markets due to its impressive STOL capabilities. However, in order to become price-competitive, its cost would need to be reduced significantly. Multiple cost-reduction concepts have been proposed by the manufacturing and procurement groups. An Optimization Team was also formed to lead the cost-reduction effort. However, a more systematic approach is required in order to achieve the ambitious reduction goals. The proposed solution is to create a top-down systematic cost-reduction framework used to coordinate and prioritize the team's current bottom-up approach. A top-down cost reduction strategy was developed based on UTC Otis' Octopus Fishing concept. Such methodology, heavily finance driven, systematically breaks M28 into sub-systems, and prioritizes improvement recommendations based on cost-reduction potentials. It also leverages on the wealth of knowledge from global cross-functional teams to generate explosive amount of improvement recommendations. The sub-systems were benchmarked against competitors cost structures. The framework will be linked to concepts generated from the database to create a process that combine top-down and bottom-up approaches. After tasks were prioritized using the outlined framework, a three-prong approach was implemented to enhance cost reduction capability. Manufacturing of labor intensive parts such as nacelle deflection cover was automated using CNC machines. A set of commodity purchasing strategies were formulated for forgings, avionics, raw materials, interior and composite materials. Lastly, a discrete Kaizen event was described to aid redesign-for-manufacturing.
by Yuxin Xia.
S.M.
M.B.A.
Asokan, Aravind E. M. Massachusetts Institute of Technology. "System architecture for single-pilot aircraft in commercial air transport operations." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/106240.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 161-165).
Commercial flight operations have seen the consistent reduction of flight crew from five to two over the past several decades. As technology improves and airplanes become increasingly capable of flying themselves, this trend of crew reduction can be expected to continue. Single pilot operations in commercial air transport presents a range of benefits and challenges, some of which are explored in this thesis. While there has been some discussion of the concept of having a single pilot operate a complex aircraft, including an announcement by a regional jet manufacturer of their intent to realize the concept in the first half of the next decade, it is seen that there is a need to define architectures and compare them in different operational contexts. This examination of architectures is conducted by identifying high level concepts or architectural decisions mentioned in the literature reviewed thus far, and creating an architectural space containing the possible constrained combinations of architectural divisions. The architectural space is represented as a safety versus cost trade space, wherein different architectural combinations are compared against present day operations. An attempt is also made to identify possible off nominal situations and the ability of the different architectures to deal with them. Safety is studied primarily as a function of pilot workload, which is identified by studying the movement of flight operations processes from the first officer, who is eliminated. Cost in this context is regarded as a combination of acquisition costs and operating costs. The former is quantified by identifying likely changes in system complexity, while the latter is a combination of crew and new infrastructure costs. Moving to SPO requires taking into account the operating context. The analysis indicates that different classes of aircraft - widebodies, narrowbodies, and regional jets - have different levels of benefits and costs in moving to SPO. Capabilities of automation needs to improve drastically before the second human in the flight deck can be replaced, and this is borne out by the dominance of human centered concepts in the trade space. The analysis also indicates that regional aircraft may be prime candidates to move to SPO first, as most regional architectures generate positive savings.
by Aravind Asokan.
S.M. in Engineering and Management
Scofield, Jan W. (Jan William). "Benefit analysis and feasibility of ground collision avoidance systems on United States Air Force aircraft." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/41801.
Повний текст джерелаIncludes bibliographical references (p. 91-92).
This thesis examines a specific type of USAF aircraft mishaps - Controlled Flight Into Terrain (CFIT) mishaps. The thesis presents data on CFIT mishaps, causes, and efforts to reduce CFIT mishaps through the development and adoption of Ground Collision Avoidance Systems (GCAS) or similar designs - Ground Proximity Warning Systems (GPWS). GPWS exist today on some USAF aircraft, but many times these systems are inadequate (as evidenced by the continued occurrence of CFIT mishaps). Both ongoing and future initiatives by the USAF to adopt and develop better GPWS/GCAS systems were studied. An analysis was performed which studied the cost to the USAF (and the U.S. taxpayer) as a result of CFIT mishaps, and compared with an analysis of the cost to develop and implement improved GPWS/GCAS systems. The results show conclusively that installing GCAS/GPWS on a majority of USAF aircraft is cost effective. Technology exist today which could improve existing GPWS performance, and although efforts to improve GPWS are moving forward, some resistance does exist. Possible reasons for resistance of GCAS/GPWS adoption were studied and several recommendations were made on how to improve the adoption of these systems within the USAF.
by Jan W. Scofield.
S.M.
Butler, Patrick C. "Value proposition analysis for medium- and heavy- lift cargo unmanned aircraft systems." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122591.
Повний текст джерелаThesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2019, In conjunction with the Leaders for Global Operations Program at MIT
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 99-109).
The majority of current unmanned aircraft system (UAS) research is focusing on small UAS operations at low altitude over rural and underpopulated areas. There is a gap in research about UAS greater than 55 pounds. The first unmanned aircraft to operate in this airspace is likely to be unmanned air cargo vehicles. This paper analyzes the commercial market opportunities for medium- and heavy-lift cargo UAS by developing value propositions for each viable market. A multi-criteria decision analysis (MCDA) tool was developed to analyze the value proposition for cargo UAS compared to other transportation vehicles. The MCDA tool evaluated the value generated from three different value attributes: cost, time, and vehicle characteristics. These were applied across fourteen different reference missions to assess the potential utilization of cargo UAS in those markets. The results of the analysis showed that a medium-lift cargo UAS is the best transportation vehicle for organ/blood transport, medical equipment transport, urgent delivery, remote delivery, and search and rescue operations. Heavy-lift cargo UAS proved to be the best transportation vehicle for oil rig delivery, HVAC service, and disaster relief. Additional findings showed that the most significant method to reduce cost for medium-lift cargo UAS is by applying autonomy and advanced command & control systems which facilitate the operation of multiple vehicles per operator. The most important consideration to reduce cost for heavy-lift cargo UAS is to increase the specific energy of the batteries used.
by Patrick C. Butler.
M.B.A.
S.M.
M.B.A. Massachusetts Institute of Technology, Sloan School of Management
S.M. Massachusetts Institute of Technology, Department of Aeronautics and Astronautics
Rudol, Piotr. "Increasing Autonomy of Unmanned Aircraft Systems Through the Use of Imaging Sensors." Licentiate thesis, Linköpings universitet, UASTECH – Teknologier för autonoma obemannade flygande farkoster, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-71295.
Повний текст джерелаTelford, Rory. "Novel methods for improving fault protection & health management within advanced aircraft electrical power systems." Thesis, University of Strathclyde, 2017. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=27950.
Повний текст джерела