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.
Results
Showing 1 to 14 of 14 for “"Autopilots"”.
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Intelligent autopilots for ships
… gyrocompass. Until the earlier 70s almost all autopilots for a ship were based on the proportional-derivative-integral (PID) controller. The main disadvantage with PID controllers is that the optimal parameters setting can be achieved only for a particular sailing condition. This shortcoming …
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Synthesis of missile autopilots robust to the presence of parametric variations
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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Missile autopilot design using Mu-Synthesis
… and their application to the design of missile autopilots are addressed in this thesis. In addition, conventional autopilot designs are performed as comparative benchmarks. This paper reviews the missile autopilot design problem and presents descriptions of the classical and H-Infinity/Mu design …
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A Design Methodology for Adaptive Open-Seas Course-Keeping Control of Containerships (Adaptive, Steering, Ship)
… stimulated an increasing interest in research on autopilots for ships. Much of this research effort is directed to the problem of automatic steering of merchant ships to minimize propulsion losses. The recent availability of small and inexpensive microprocessor-based digital computers enables …
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Adaptive Control of Micro Air Vehicles
… during flight are explored. However, because the autopilots on MAVs are small, many of the adaptive control algorithms like those that employ least squares estimation may take too much code space, memory, and/or computing power. In this thesis we develop several Lyapunov-based model reference …
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Robust Yaw/roll Control of High-Speed Containerships
… having ignored certain dynamics, were designing autopilots which were issuing inherently conflicting control signals. This thesis work demonstrated the effectiveness of each manner of control, as well as, the MV design approach itself.
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Reconfigurable autopilot design for a high performance aircraft using model predictive control
… describes the development of four types of MPC autopilots. A description of the controller implementation and failure implementation is also included. Each autopilot is subject to a surface failure during certain times in a sample maneuver and the resulting controller adaptation is analyzed. All …
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System Architectures for Cooperative Teams of Unmanned Aerial Vehicles Interacting Physically with the Environment
… are becoming a trend. In that case, as di erent autopilots, heterogeneous platforms, and application-dependent software components have to be integrated, multi-UAV system architectures that are fexible and can adapt to the team's needs are required. In this thesis, we develop system architectures …
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Adaptive Control Techniques for Transition-to-Hover Flight of Fixed-Wing UAVs
… payloads and missions, often requiring custom autopilots and unconventional airframe configurations. With recent government spending cuts, UAV operators like the military and law enforcement agencies have been urging UAV developers to make their aircraft cheaper, more versatile, and easier to …
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Perching with fixed wings
… far outside the flight envelope of conventional autopilots. Given the tremendous thrust-to-weight ratio available on these small machines [1, 2], linear control approaches have recently produced impressive demonstrations that come close to matching this agility for a certain class of aerobatic …
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Building blocks for the mind
… that could be saved if the behavior of plane autopilots was better understood [1]. Current state of the art approaches to man-machine interaction within a dialog, which use sentiment analysis, recommender systems, or information retrieval algorithms, fail to provide a rationale for their …
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Models, optimal performances and sensitivities of commercial flight trajectory in the air traffic system
… trajectories are obtained with the pilots or autopilots actively tracking flight objectives extracted from the generated trajectories. They reflect trajectory predictability. In this thesis, closed-loop sensitivities are computed with respect to potential uncertainties of vertical wind speed.
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A Mathematical Model To Simulate Small Boat Behaviour
… can assist with the design and testing of marine autopilots. The boat model is presented in six degrees-of-freedom, which, with suitable wave disturbance terms, allows motions such as broaching to be analysed. Instabilities in the performance of an autopilot arising from such sea induced yaw …
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Contributions to deconfliction advanced U-space services for multiple unmanned aerial systems including field tests validation
… a given trajectory. Currently, commercial autopilots do not offer this functionality that allows to improve the airspace occupancy using time as an additional dimension. Moreover, the integration of onboard detect and avoid capabilities, as well as the consequences for U-space services are …