Robust Control Of Flexible Space Vehicles With Minimum Structural Excitation
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Robust On Off Pulse Control Of Flexible Space Vehicles
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Author : National Aeronautics and Space Adm Nasa
language : en
Publisher:
Release Date : 2018-11-14
Robust On Off Pulse Control Of Flexible Space Vehicles written by National Aeronautics and Space Adm Nasa and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-11-14 with categories.
The on-off reaction jet control system is often used for attitude and orbital maneuvering of various spacecraft. Future space vehicles such as the orbital transfer vehicles, orbital maneuvering vehicles, and space station will extensively use reaction jets for orbital maneuvering and attitude stabilization. The proposed robust fuel- and time-optimal control algorithm is used for a three-mass spacing model of flexible spacecraft. A fuel-efficient on-off control logic is developed for robust rest-to-rest maneuver of a flexible vehicle with minimum excitation of structural modes. The first part of this report is concerned with the problem of selecting a proper pair of jets for practical trade-offs among the maneuvering time, fuel consumption, structural mode excitation, and performance robustness. A time-optimal control problem subject to parameter robustness constraints is formulated and solved. The second part of this report deals with obtaining parameter insensitive fuel- and time- optimal control inputs by solving a constrained optimization problem subject to robustness constraints. It is shown that sensitivity to modeling errors can be significantly reduced by the proposed, robustified open-loop control approach. The final part of this report deals with sliding mode control design for uncertain flexible structures. The benchmark problem of a flexible structure is used as an example for the feedback sliding mode controller design with bounded control inputs and robustness to parameter variations is investigated. Wie, Bong and Sinha, Ravi Unspecified Center ATTITUDE CONTROL; FLEXIBLE SPACECRAFT; JET CONTROL; ORBIT TRANSFER VEHICLES; ORBITAL MANEUVERING VEHICLES; ROBUSTNESS (MATHEMATICS); SPACE STATIONS; ALGORITHMS; ATTITUDE STABILITY; FEEDBACK CONTROL; OPTIMAL CONTROL; TIME OPTIMAL CONTROL...
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1992
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Aeronautics categories.
Monthly Catalog Of United States Government Publications
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Author :
language : en
Publisher:
Release Date : 1992
Monthly Catalog Of United States Government Publications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Government publications categories.
Monthly Catalogue United States Public Documents
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Author :
language : en
Publisher:
Release Date : 1993
Monthly Catalogue United States Public Documents written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Government publications categories.
High Performance Robust Control Of Flexible Space Structures
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Author : Mark S. Whorton
language : en
Publisher:
Release Date : 1997
High Performance Robust Control Of Flexible Space Structures written by Mark S. Whorton and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Aerodynamics categories.
Many spacecraft systems have ambitious objectives that place stringent requirements in terms of pointing and vibration control systems. Because of the difficulty of obtaining accurate models for flexible space structures, limitations must be placed on performance in order to ensure stability. In some cases, to achieve sufficiently high performance to accomplish mission objectives will require the ability to refine the control design model based on closed-loop test data and tune the controller based on the refined model. The objective of this thesis is to develop a procedure for control system design which maximizes achievable performance with robust stability guarantees. Two facts of this dissertation are control design and system identification. A control design and system identification. A control design procedure is developed based on mixed H2/H[Infinite symbol] [subscript] optimization which is used to design a set of controllers which explicitly trade between nominal performance and robust stability. A homotopy algorithm is presented which generates a trajectory of gains along the boundary which trades between robustness and performance. This set of controllers may be implemented to determine the maximum achievable performance for a given model error bound. Examples are given which show that a better balance between robustness and performance is obtained using the mixed H2/H[Infinite symbol][subscript] design method than either H2 or ư-synthesis control design. A second contribution of this dissertation is a new procedure for closed-loop system identification. Using closed-loop response data, the parameters of a control design model in a canonical realization are refined. Examples are provided to demonstrate the convergence of the parameter esimation and improved performance realized by using the refined model for controller redesign. These developments result in an effective mechanism for achieving high performance control of flexible space structures.
Technology For Large Space Systems
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Author :
language : en
Publisher:
Release Date : 1990
Technology For Large Space Systems written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Large space structures (Astronautics) categories.
Government Reports Announcements Index
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Author :
language : en
Publisher:
Release Date : 1993-07
Government Reports Announcements Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993-07 with Science categories.
Large Space Structures Systems In The Space Station Era
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Author :
language : en
Publisher:
Release Date : 1990
Large Space Structures Systems In The Space Station Era written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Large space structures (Astronautics) categories.
Effects Of Structural Flexibility On Launch Vehicle Control Systems
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Author : United States. National Aeronautics and Space Administration
language : en
Publisher:
Release Date : 1970
Effects Of Structural Flexibility On Launch Vehicle Control Systems written by United States. National Aeronautics and Space Administration and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Space vehicles categories.
Large Space Structures Systems In The Space Station Era
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Author :
language : en
Publisher:
Release Date : 1993
Large Space Structures Systems In The Space Station Era written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Large space structures (Astronautics) categories.