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 3391 for “"trajectory"”.
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Orbital transfer trajectory optimization
Recent developments in astronautical engineering have led to the adoption of low thrust rocket engines for spacecraft. Optimizing the orbital transfers for low thrust engines is significantly more complicated than optimizing transfers for impulsive engines because a continuous control law must be …
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Batch Continuous-Time Trajectory Estimation
… mapping (SLAM) formulation with a discrete-time trajectory model; this is not well suited for scanning-type sensors, such as lidar. In this thesis, we assert that a continuous-time model of the trajectory is a more natural and principled representation for robotic-state estimation. Practical …
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Optimal trajectory design under uncertainty
Reference trajectory design for atmospheric reentry vehicles can be accomplished through trajectory optimization using optimal control techniques. However, this method generally focuses on nominal vehicle performance and does not include robustness considerations during trajectory design. This …
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Scalable Techniques for Trajectory Outlier Detection
… each object into a time-ordered sequence called trajectory. The high availability of trajectory data has permitted the execution of data analysis operations such as trajectory outlier detection, which consists in the identification of those trajectories that behave much differently from the rest …
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Deep Learning for Space Trajectory Optimization
L'abstract è presente nell'allegato / the abstract is in the attachment
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Topics in Trajectory Generation for Robots
… of motion as a function of time, namely the trajectory. As we discuss in this thesis, a trajectory can be acquired from a human demonstration or generated by carefully designing an objective function. In the first approach, we examine a number of robotic setups which are suitable for human …
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A Probabilistic-Approach to Trajectory Sensitivity
Made available in DSpace on 2015-05-12T22:38:12Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7317563.PDF: 2674120 bytes, checksum: 7cf112c86d2822c6839489aa40dd22b3 (MD5) Previous issue date: 1973
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Biped walking trajectory design and stabilization
… model (LIPM), to design a dynamically stable trajectory for the biped robot, based on given gaits. Two different approaches will be used for the trajectory generation: boundedness constraint and linear-quadratic-regulator method. Both of these methods compute the center of mass (CoM) …
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Aerodynamic fuze characteristics for trajectory control
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1998.
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Average frequency trajectory control : normal mode.
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 1976
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Safe trajectory planning of autonomous vehicles
… presents a novel framework for safe online trajectory planning of unmanned vehicles through partially unknown environments. The basic planning problem is formulated as a receding horizon optimization problem using mixed-integer linear programming (MILP) to incorporate kino-dynamic, obstacle …
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Trajectory optimization involving powered planetary swingbys,
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1973.
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Statistical trajectory models for phonetic recognition
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
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Airplane trajectory expansion for dynamics inversion
… to perform a maneuver from a definition of the trajectory. This is called the inverse problem. It has been proposed that if a complete set of states and state time derivatives can be derived from a trajectory then a model-following solution can allocate the controls necessary for the maneuver. …
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Optimal Control in Aircraft Trajectory Planning
Trajectory planning for autonomous and piloted aircraft must satisfy not only geometric constraints but also full six-degree-of-freedom dynamics, actuator limits, and mission- or safety-driven performance objectives. This thesis investigates optimal control as a refinement tool for …
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Optimization and Trajectory Analysis of Morphing Waveriders
… range was evaluated using a direct collocation trajectory optimization algorithm. While the analytical model and CFD tool predicted similar performance trends, the CFD based method was better suited to capture the complex features experienced by round-leading edge morphing waveriders. For both …
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Benchmarking Academic Standards : A Policy Trajectory Study.
… Method: The study adopts the form of a policy trajectory study to examine each stage of the policy process. The policy trajectory uses the metaphor of the staircase as a simplifying organisational device to mark out the different phases of the trajectory. This does not imply that the policy …
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The trajectory of male homosexuality in Nazism
… the twentieth century, which determined the trajectory of male homosexuality under the Third Reich. While the party did not actively promote homosexuality, early Nazism valued hypermasculinity and homosocial relationships. Right-wing veterans of the First World War were attracted to the Nazi …
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