Optimal Control Of Electrodynamic Tethers
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Optimal Control Of Electrodynamic Tethers
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Author :
language : en
Publisher:
Release Date : 2008
Optimal Control Of Electrodynamic Tethers written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Low thrust propulsion systems offer a fuel-efficient means to maneuver satellites to new orbits, however they can only perform such maneuvers when they are continuously operated for a long time. Such long-term maneuvers occur over many orbital revolutions often rendering short time scale trajectory optimization methods ineffective. An approach to long time scale, multirevolution optimal control of an electrodynamic tether is investigated for a tethered satellite system in Low Earth Orbit with atmospheric drag. Optimal control problems are constructed in such a way as to maneuver the satellite to new orbits while minimizing a cost function subject to the constraints of the time-averaged equations of motion by controlling current in the tether. The method of averaging is employed to transform the optimal control problem from the time domain into a Fourier space where the complex problem is drastically reduced to a Zermelo type problem that is solved using a pseudospectral method. Optimal control solutions are determined that maneuver an electrodynamic tether to new orbits over long time scales while managing librational motion using only current in a wire. Results are simulated using a higher fidelity?truth? model to validate the controller performance.
Modelling And Optimal Control Of Electrodynamic Tethers
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Author : Andrew Hyslop
language : en
Publisher:
Release Date : 2003
Modelling And Optimal Control Of Electrodynamic Tethers written by Andrew Hyslop and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
An Approach To Optimal Control Of Electrodynamic Tethers In A Stochastically Varying Drag Environment
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Author : Alexander James Buck
language : en
Publisher:
Release Date : 2011
An Approach To Optimal Control Of Electrodynamic Tethers In A Stochastically Varying Drag Environment written by Alexander James Buck and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Atmospheric density categories.
Electrodynamic tethers offer a real option of zero-propellant orbital maneuvers in space. Using a linear controller to regulate a non-linear optimal control solution we can achieve reliable performance in spite of modeling error and environmental perturbations.
Optimal Control Of Electrodynamic Tether Satellites
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Author : Robert E. Stevens
language : en
Publisher:
Release Date : 2008
Optimal Control Of Electrodynamic Tether Satellites written by Robert E. Stevens and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Artificial satellites categories.
Optimal Orbit Maneuvers With Electrodynamic Tethers
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Author :
language : en
Publisher:
Release Date : 2006
Optimal Orbit Maneuvers With Electrodynamic Tethers written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Electrodynamics categories.
Electrodynamic tethers can be employed to effect spacecraft orbital maneuvering outside of Keplerian motion without incurring the mass penalty of traditional propulsion systems. Recently, several studies have been conducted to establish a framework for guidance and control of such orbit maneuvers, including the optimization of a particular maneuver, the orbit transfer. This thesis provides an overview of the concept of electrodynamic tether employment, summarizes research in the field, and catalogues recent proposals. Two minimum-time orbit transfer problems are considered - an orbit raising and a deorbit problem. Both formulations use an identical set of initial conditions for the spacecraft. In the case of the orbit raising problem formulation, the terminal manifold requires an increase in semimajor axis and return to initial eccentricity and inclination values. Other orbital elements are unconstrained. For the deorbit case, optimal control is developed for a minimum time decrease in semimajor axis; the remaining orbital elements are unconstrained. The totality of optimality conditions for both cases of using electrodynamic tethers to maneuver from an initial orbit is examined. Observations and recommendations for future work are presented in the conclusions.
Optimization Algorithms
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Author : Jan Valdman
language : en
Publisher: BoD – Books on Demand
Release Date : 2018-09-05
Optimization Algorithms written by Jan Valdman and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-05 with Mathematics categories.
This book presents examples of modern optimization algorithms. The focus is on a clear understanding of underlying studied problems, understanding described algorithms by a broad range of scientists and providing (computational) examples that a reader can easily repeat.
Astrodynamics
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Author :
language : en
Publisher:
Release Date : 2006
Astrodynamics written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Astrodynamics categories.
Tethered Space Robot
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Author : Panfeng Huang
language : en
Publisher: Academic Press
Release Date : 2017-11-06
Tethered Space Robot written by Panfeng Huang and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-11-06 with Technology & Engineering categories.
Tethered Space Robot: Dynamics, Measurement, and Control discusses a novel tethered space robot (TSR) system that contains the space platform, flexible tether and gripper. TSR can capture and remove non-cooperative targets such as space debris. It is the first time the concept has been described in a book, which describes the system and mission design of TSR and then introduces the latest research on pose measurement, dynamics and control. The book covers the TSR system, from principle to applications, including a complete implementing scheme. A useful reference for researchers, engineers and students interested in space robots, OOS and debris removal. Provides for the first time comprehensive coverage of various aspects of tethered space robots (TSR) Presents both fundamental principles and application technologies including pose measurement, dynamics and control Describes some new control techniques, including a coordinated control method for tracking optimal trajectory, coordinated coupling control and coordinated approaching control using mobile tether attachment points
Journal Of Guidance Control And Dynamics
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Author :
language : en
Publisher:
Release Date : 2009
Journal Of Guidance Control And Dynamics written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Airplanes categories.
Attitude Dynamics And Control Of Space Debris During Ion Beam Transportation
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Author : Vladimir Aslanov
language : en
Publisher: Elsevier
Release Date : 2022-10-21
Attitude Dynamics And Control Of Space Debris During Ion Beam Transportation written by Vladimir Aslanov and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-10-21 with Technology & Engineering categories.
Attitude Dynamics and Control of Space Debris During Ion Beam Transportation provides an overview of the cutting-edge research around the topic of contactless ion beam transportation for the removal of space debris. This practical guide covers topics such as space debris attitude motion, the motion of rigid materials in an inhomogeneous high-speed rarefied medium, gravity gradient torque, and more. The book examines and compares the various ways to control the spatial motion of space debris, such as engine thrust or altering the direction of the ion beam axis, and offers simple mathematical models for analyzing system behaviors. Provides insight on the features, advantages, and disadvantages of contactless ion beam transportation of space debris Demonstrates how classical mechanics, nonlinear and chaotic dynamics, and methods of stability theory are applied during the ion beam method Includes simple mathematical models describing the behavior of the considered mechanical system, allowing the reader to understand the nature of the studied phenomenon