Download or read book Analysis of a Passive Gravity Gradient Satellite Attitude Control System written by Roza Hashemian and published by . This book was released on 1965 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Numerical Analysis of Passive Attitude Stabilization Using a Tethered Balloon on a Gravity Gradient Satellite written by Ernest Matias Maramba and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Attitude Stabilization for CubeSat written by Mohammed Chessab Mahdi and published by Cambridge Scholars Publishing. This book was released on 2018-11-14 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores CubeSat technology, and develops a nonlinear mathematical model of a spacecraft with the assumption that the satellite is a rigid body. It places emphasis on the CubeSat subsystem, orbit dynamics and perturbations, the satellite attitude dynamic and modeling, and components of attitude determination and the control subsystem. The book focuses on the attitude stabilization methods of spacecraft, and presents gravity gradient stabilization, aerodynamic stabilization, and permanent magnets stabilization as passive stabilization methods, and spin stabilization and three axis stabilization as active stabilization methods. It also discusses the need to develop a control system design, and describes the design of three controller configurations, namely the Proportional–Integral–Derivative Controller (PID), the Linear Quadratic Regulator (LQR), and the Fuzzy Logic Controller (FLC) and how they can be used to design the attitude control of CubeSat three-axis stabilization. Furthermore, it presents the design of a suitable attitude stabilization system by combining gravity gradient stabilization with magnetic torquing, and the design of magnetic coils which can be added in order to improve the accuracy of attitude stabilization. The book then investigates, simulates, and compares possible controller configurations that can be used to control the currents of magnetic coils when magnetic coils behave as the actuator of the system.
Download or read book Estimation and Prediction of the Attitude of a Passive Gravity stabilized Satellite written by Bruce E. Tinling and published by . This book was released on 1969 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Method for predicting attitude of passive gravity stabilized satellite.
Download or read book Spacecraft Attitude Determination and Control written by J.R. Wertz and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 877 pages. Available in PDF, EPUB and Kindle. Book excerpt: Roger D. Werking Head, Attitude Determination and Control Section National Aeronautics and Space Administration/ Goddard Space Flight Center Extensiye work has been done for many years in the areas of attitude determination, attitude prediction, and attitude control. During this time, it has been difficult to obtain reference material that provided a comprehensive overview of attitude support activities. This lack of reference material has made it difficult for those not intimately involved in attitude functions to become acquainted with the ideas and activities which are essential to understanding the various aspects of spacecraft attitude support. As a result, I felt the need for a document which could be used by a variety of persons to obtain an understanding of the work which has been done in support of spacecraft attitude objectives. It is believed that this book, prepared by the Computer Sciences Corporation under the able direction of Dr. James Wertz, provides this type of reference. This book can serve as a reference for individuals involved in mission planning, attitude determination, and attitude dynamics; an introductory textbook for stu dents and professionals starting in this field; an information source for experimen ters or others involved in spacecraft-related work who need information on spacecraft orientation and how it is determined, but who have neither the time nor the resources to pursue the varied literature on this subject; and a tool for encouraging those who could expand this discipline to do so, because much remains to be done to satisfy future needs.
Download or read book Study of Feasibility of Attitude Control System for a 3U Cubesat Based on Gravity boom written by Ana Cambón Periscal and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The AOCS is the system needed in order to know the orientation of our space vehicle and be able to control it so it is possible to reach the desired pointing and given this, began with the execution of scientific missions. In the case of this project the AOCS system will be only consists of a gravity boom, so the attitude control of this 3U CubeSat will be passive trough the gravity gradient torque. For the simulations that take place in this study, the software MATLAB will be used as a vehicle to analyse the AOCS system. This same software will allow to determine the inertia and other characteristics of the 3U Cubesat, which will be fundamental to the subsequent calculations in order to obtain the gravity boom influence in the spacecraft stabilization. This document will explain the physics behind the spacecraft model, the calculations needed in order to obtain its inertia values and also the equations needed to model the space environment and the forces that are needed for the chosen analysis. Also the algorithms designed in MatLab will be presented in form of Annex, being the calculations for the plots, inertia, angular deviations, ... The results have the goal of determining if the use of the gravity boom is enough to control the attitude of the Cubesat, so diverse configurations for the satellite will be simulated, with variations on the mass of the gravity boom and the length of the cable that links it with the CubeSat body. As it shows in the conclusion section, the configuration where mgb= 1 kg and lcb= 2.5 m seems to meets the requirements of pointing for medium/low accuracy, but if the use of some sensor was to be considered (such as sun sensor or star trackers), missions with the need for a high accuracy system could be feasible as the nadir pointing obtained has a very low angular deviation. However, even though the results for this values are successful, any increase in both variables characterstics lead to the instability of the CubeSat and can not be considered in order to reduce the angular deviation for both yaw and pitch.
Download or read book Attitude Performance of the Geos ii Gravity gradient Spacecraft written by James M. Whisnant and published by . This book was released on 1969 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the report is to discuss the design analysis and flight performance of the attitude stabilization system of one of the Geodetic Earth Orbiting Satellites, GEOS-II. Geocentric stabilization is achieved in a completely passive manner by utilization of the gravity-gradient principle and a passive energy dissipator. The system analysis is accomplished through a digital solution of the equations of motion which describe the orientation of the spacecraft in orbit. Flight performance is obtained by an onboard attitude measuring system which determines the orientation of the satellite-sun line and magnetic field vector in the satellite reference system. A comparison of the theoretical and measured orientation of the spacecraft concludes the paper. (Author).
Download or read book A Technique for Passive Attitude Control of Solar Oriented Interplanetary Spacecraft written by Vernon K. Merrick and published by . This book was released on 1968 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1983 with total page 1368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Torques and Attitude Sensing in Earth Satellites written by S. Fred Singer and published by Elsevier. This book was released on 2012-12-02 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applied Mathematics and Mechanics, Volume 7: Torques and Attitude Sensing in Earth Satellites focuses on the possible torques that can affect the angular momentum of an Earth satellite. This book provides an understanding of the environment in which a satellite operates. Organized into 16 chapters, this volume starts with an overview of the application of force-free motion to space programs. This text then discusses the torque effects of a gravitational field, particularly with its gradient. Other chapters consider a particular method of gravity-gradient stabilization that utilizes a passive device to damp librations and thereby attain a vertical orientation. This book discusses as well the effects of the geomagnetic field on the angular motion of a satellite. The reader is also introduced to the method of magnetic attitude control employed in the Tiros satellite. The final chapter deals with the problem of horizon sensing, which is important for satellites requiring Earth stabilization. Astrophysicists will find this book useful.
Download or read book A Two gyro Gravity gradient Satellite Attitude Control System written by J. A. Lewis and published by . This book was released on 1964 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Symposium on Gravity Gradient Attitude Stabilization written by and published by . This book was released on 1968 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Symposium on Passive Gravity Gradient Stabilization Ames Research Center Moffett Field California May 10 11 1965 written by and published by . This book was released on 1966 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spacecraft Attitude Determination and Control written by James R. Wertz and published by Springer Science & Business Media. This book was released on 1978-12-31 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt: Roger D. Werking Head, Attitude Determination and Control Section National Aeronautics and Space Administration/ Goddard Space Flight Center Extensiye work has been done for many years in the areas of attitude determination, attitude prediction, and attitude control. During this time, it has been difficult to obtain reference material that provided a comprehensive overview of attitude support activities. This lack of reference material has made it difficult for those not intimately involved in attitude functions to become acquainted with the ideas and activities which are essential to understanding the various aspects of spacecraft attitude support. As a result, I felt the need for a document which could be used by a variety of persons to obtain an understanding of the work which has been done in support of spacecraft attitude objectives. It is believed that this book, prepared by the Computer Sciences Corporation under the able direction of Dr. James Wertz, provides this type of reference. This book can serve as a reference for individuals involved in mission planning, attitude determination, and attitude dynamics; an introductory textbook for stu dents and professionals starting in this field; an information source for experimen ters or others involved in spacecraft-related work who need information on spacecraft orientation and how it is determined, but who have neither the time nor the resources to pursue the varied literature on this subject; and a tool for encouraging those who could expand this discipline to do so, because much remains to be done to satisfy future needs.
Download or read book Precision Gravity gradient Satellite Attitude Control written by Bernard Charles Sherman and published by . This book was released on 1967 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Some Notes on Attitude Control of Earth Satellite Vehicles written by Warren Gillespie and published by . This book was released on 1959 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1966 with total page 1320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
