Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 646 for “"on-board"”.
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Optimal and on-board near-optimal midcourse guidance
… missile featuring boost-coast-sustain propulsion. A vertical plane, point-mass model is studied with load factor as a control variable. Time-range-energy optimal trajectories are computed, open-loop, via the usual necessary conditions and a multiple-shooting algorithm. A requirement on terminal …
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On-board near-optimal climb-dash energy management
… modelling has been extensively used in the solution of problems in flight mechanics. In particular the lowest-order attractive due to its simplicity, energy model is but because of the assumptions made (γ = 0.0) is of little use for realtime guidance. The method of matched asymptotic expansions …
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The prospects of plasmatron on-board fuel reforming vehicles
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2002.
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Data collection framework for vehicular On-Board-Diagnostic systems
Most modern vehicles contain an On-Board-Diagnostic (OBD) system that can collect a wide range of system data from the vehicle. In aggregation, such data could be applied towards solving the problems of accident prevention, vehicular safety, and driving efficiency. In this paper, we describe our …
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A study on board of directors and organizational performance
This dissertation reports an investigation of the relationship between board strategic management functions and organizational performance. This dissertation provides a framework for understanding the influence of boards of directors in decision making, planning, control and operation, and …
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Autonomous & adaptive oceanographic feature tracking on board autonomous underwater vehicles
The capabilities of autonomous underwater vehicles (AUVs) and their ability to perform tasks both autonomously and adaptively are rapidly improving, and the desire to quickly and efficiently sample the ocean environment as Earth's climate changes and natural disasters occur has increased …
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Multi-fuel operation of modern engines; on board fuel identification
<p>Modern engines require enhancement of electronic controls to achieve better fuel economy, higher power density and satisfactory emissions levels while operating safely.</p> <p>Military vehicles should be capable to run safely and efficiently on any fuel available in the field, therefore on-board …
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Autonomous & adaptive oceanographic feature tracking on board autonomous underwater vehicles
The capabilities of autonomous underwater vehicles (AUVs) and their ability to perform tasks both autonomously and adaptively are rapidly improving, and the desire to quickly and efficiently sample the ocean environment as Earth's climate changes and natural disasters occur has increased …
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Quality of on-board cryogenically frozen sea scallops (Placopecten Magellanicus)
Scallops have traditionally been blast or sharp frozen. This study compared the quality of at-sea cryogenically frozen scallops with fresh and mechanically frozen scallops. A liquid CO₂ batch freezer was installed on-board the scallop boat. Samples were analyzed for microbiological, physical, …
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On-Board Artificial Intelligence for Failure Detection and Safe Trajectory Generation
<p>The use of autonomous flight vehicles has recently increased due to their versatility and capability of carrying out different type of missions in a wide range of flight conditions. Adequate commanded trajectory generation and modification, as well as high-performance trajectory tracking control …
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Ionization In Diesel Combustion For On-Board Diagnostics And Engine Control
… and specific power output, but there is concern about engine-out NOx and particulate matter emissions. To meet the current emission standards, advanced diesel engines are fitted with electronically controlled fuel injection systems and sophisticated and expensive after-treatment devices. …
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Dual High-Voltage Power Supply for Use on Board a CubeSat
<p>Since their conception in 1999, CubeSats have come and gone a long way. The first few that went into space were more of a “proof of concept,” and were more focused on sending simple data and photographs back to Earth. Since then, vast improvements have been made by over 40 universities and …
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Polymer waveguide based optical interconnects for high-speed on-board communications
This dissertation presents a study of multimode polymer waveguide technology for use in board-level communication links for future data centres and supercomputers. The motivation for this work comes from the severe interconnection bandwidth challenges faced by the conventional electrical …
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Performance evaluation of multimedia satellite communications systems using on-board packet switches
Satellite communications systems are ideally equipped to provide future multimedia services on a global level and at a distance-independent cost. In order to meet the ever-growing bandwidth demands of these new applications, satellites employing multiple spot beam antennas are required. An on-board …
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Utilizing Permanent On-Board Water Storage for Efficient Deep Space Radiation Shielding
<p>As space technologies continue to develop rapidly, there is a common desire to launch astronauts beyond the ISS to return to the Moon and put human footsteps on Mars. One of the largest hurdles that still needs to be addressed is the protection of astronauts from the radiation environment seen …
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On-Board Orbit Determination and 3-Axis Attitude Determination for Picosatellite Applications
This thesis outlines an orbit determination and 3-axis attitude determination system for use on orbit as applicable to 1U CubeSats and other picosatellites. The constraints imposed by the CubeSat form factor led to the need for a simple configuration and relaxed accuracy requirements. To design a …
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On Board for Brands: Understanding the Motivating Influences of Sponsored Female Snowboarders
While athlete endorsements and sponsorship have been extensively researched in sport marketing, little attention has been given to the athlete’s perspective (Dumont, 2016). This study sought to address this gap by exploring the motivations and decision-making factors that drive female athletes’ …
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On-board automatic aid and advisory for pilots of control-impaired aircraft
… Institute of Technology, Dept. of Aeronautics and Astronautics, 1988.
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Design of a biologically-inspired underwater burrowing robot with on-board actuation
… Atlantic razor clam (Ensis directus) burrows by contracting its valves, fluidizing the surrounding soil and reducing burrowing drag. Moving through a fluidized, rather than static, soil requires energy that scales linearly with depth, rather than depth squared. In addition to providing an …
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Decentralized on-board planning and scheduling for crosslink-enabled Earth-observing constellations
… and temporal coverage, while at a fraction of the cost. Planning and scheduling for efficient bulk data routing with discrete crosslink windows in a dynamic network is a difficult combinatorial optimization problem [30]. As problem size grows, quickly solving the planning and scheduling …
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