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 432 for “"maneuver"”.
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Robust rendezvous maneuver point conditions
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1992.
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Maneuver and control of flexible spacecraft
… spacecraft undergoing large rigid-body maneuvers are derived. The elastic motions are assumed to remain in the linear range. A method of substructure synthesis is presented which spatially discretizes the equations of motion. A perturbation approach is used to solve the equations of …
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Flight Regime and Maneuver Recognition for Complex Maneuvers
… of flight regime recognition during complex maneuvers flown in a fixed wing airplane using measured data from an Inertial Measurement Unit (IMU). Flight Regime Recognition (FRR) is required for numerous applications in the aerospace and aviation industry, including the determination of loads …
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Application of semianalytic satellite theory to maneuver planning
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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Maneuver-Based Motion Control of a Miniature Helicopter
This thesis deals with the control of a highly maneuverable miniature helicopter about trajectories, generated online, from a library of prespecified maneuvers. Linearizing the nonlinear equations describing the helicopter dynamics about the prespecified, library maneuvers results in a hybrid …
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Tracking maneuvering targets via semi-Markov maneuver modeling
… Gaussian disturbance and error processes. The maneuvering target tracking problem generally involves nonlinear system properties as well as non-Gaussian disturbance processes. The study presented here explores several solutions. to this problem. An adaptive state estimator centered about the …
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Optimal maneuver guidance with sensor line of sight constraint
… low altitude, subsonic, vertical plane approach maneuver of an air vehicle constrained to maintain view of a fixed final position is studied using a nonlinear, constrained, optimal control problem formulation. Multiple, competing optimization criteria are included separately as performance goals …
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Modeling and Slew-Maneuver Control of a Flexible Spacecraft
<p>Slew-maneuver control problem is studied for a flexible spacecraft consisting of a rigid main body to which a long flexible appendage is attached. Nonlinear dynamical system models are developed using both distributed parameter modeling and discrete parameter modeling; these models are shown to …
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Debris collision avoidance maneuver optimization (CAMO) for satellite constellations
… which typically rely on single-impulse maneuvers executed in response to ground-based warnings, often suffer from high propellant costs and operational inefficiencies due to late detection and reaction times. This thesis proposes and validates an autonomous, multi-objective optimization …
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Nonlinear wake evolution of Joukowski aerofoils in severe maneuver
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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Flying between obstacles with an autonomous knife-edge maneuver
… a high speed (7m/s or 16 MPH) "knife-edge" maneuver through a gap that is smaller than the aircraft's wingspan. The maneuver consists of flying towards a gap, rolling to a significant angle, accurately navigating between the obstacles, and rolling back to horizontal. The speed and roll-rate …
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Control of flexible spacecraft during a minimum-time maneuver
The problem of simultaneous maneuver and vibration control of a flexible spacecraft can be solved by means of a perturbation approach whereby the slewing of the spacecraft regarded as rigid represents the zero-order problem and the control of elastic vibration, as well as of elastic perturbations …
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Maneuver analysis for spinning thrusting spacecraft and spinning tethered spacecraft
… undergoing orbital injections or control maneuvers, misalignments and center-of-mass offset create undesired body-fixed torques. The effects of the body-fixed torques, which in turn cause velocity pointing errors, can be reduced by ramping up (and then ramping down) the thruster. The first …
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Design and verification of a safe autonomous satellite rendezvous maneuver
A fundamental maneuver in autonomous space operations is known as rendezvous, where an active spacecraft navigates towards and maneuvers within close proximity of a free-flying passive spacecraft. Any mistake during autonomous space flight can be extremely costly, yet these systems are difficult to …
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Angles-only navigation technique for maneuver-free spacecraft proximity operations
… problem is for the surveyor to perform precise maneuvers to change the nominal angle profile between the surveyor and the target. In the space environment, the orbital dynamics are inherently nonlinear and natural orbit perturbations have the effect of continuous micro-maneuvers. These …
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Ecology of pronghorns on the Piñon Canyon Maneuver Site, Colorado
… were studied on the 1040 km² Piñon Canyon Maneuver Site, in southeastern Colorado, prior to initiation of military training. Forty-seven adults and 32 fawns were radio marked; 247 adults were color collared or ear tagged only. Using aerial strip and quadrat surveys, I estimated a summer …
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Ecology of mule deer on the Pinon Canyon Maneuver Site, Colorado
… and habitat use were studied on the Pinon Canyon Maneuver Site in southeastern Colorado during January 1983-December 1984. Thirty-eight adults and 28 fawns were radio collared, and 35 adults were color collared or ear tagged. Population estimates were 365 and 370 deer for 1983 and 1984, …
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Finite Element Model of the Pediatric Hip Joint During the Barlow Maneuver
… examination of the hip, one method is the Barlow maneuver.</p> <p>The aim of the project is to use healthy and dysplastic hip Finite Element Models to predict the biomechanics of the Barlow maneuver. By modeling and studying the diagnostic maneuver, insight can be gained into the contact pressures …
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A Genetic Algorithm Framework using Variable Length Chromosomes for Vehicle Maneuver Planning
… class of reconfigurable systems are fleets of maneuvering vehicles. Considering this class naturally leads to the question of how to generate the optimal set of maneuvers over an operational campaign. This thesis presents a genetic algorithm framework with Variable Length Chromosomes (VLC) to …
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