Download or read book Gravity gradient Attitude Stabilization for Communication Satellites written by Frederick F. Mobley and published by . This book was released on 1964 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gravity-gradient attitude stabilization has been used successfully in a number of near-earth satellites in recent months. After the pioneering effort of the Applied Physics Laboratory in the first successful demonstration of gravity stabilization in June 1963, this technique has become one of the basic elements of satellite technology. By January of 1964 three APL satellites had been vertically stabilized by the passive gravity-gradient technique, and are expected to continue in this state indefinitely. A satellite of the Naval Research Laboratory was also stabilized successfully in January 1964. These developments are reviewed herein, and the problems of extending these techniques to higher altitude for use as communication satellites are discussed. (Author).

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 Spacecraft Dynamics and Control written by Marcel J. Sidi and published by Cambridge University Press. This book was released on 2000-07-03 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Satellites are used increasingly in telecommunications, scientific research, surveillance, and meteorology, and these satellites rely heavily on the effectiveness of complex onboard control systems. This 1997 book explains the basic theory of spacecraft dynamics and control and the practical aspects of controlling a satellite. The emphasis throughout is on analyzing and solving real-world engineering problems. For example, the author discusses orbital and rotational dynamics of spacecraft under a variety of environmental conditions, along with the realistic constraints imposed by available hardware. Among the topics covered are orbital dynamics, attitude dynamics, gravity gradient stabilization, single and dual spin stabilization, attitude maneuvers, attitude stabilization, and structural dynamics and liquid sloshing.

Download or read book A System for Passive Gravity gradient Stabiliza Tion of Earth Satellites written by Robert E. Fischell and published by . This book was released on 1963 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The satellite 1963 22A was successfully captured into a condition of passive, gravity-gradient stabilization. All elements of the stabilization system, including magnetic dispin, magnetic orientation devices, the extendible boom, the damping spring, and the attitude detection system performed satisfactorily. An unexpected high frequency oscillation of the boom and satellite system was observed which was most probably a dynamic effect resulting from thermal bending. This has caused the satellite to stabilize with a maximum deviation off the vertical of approximately 10 degrees. The objective of the gravity-gradient stabilization for the 22A satellite was to have the antennas directed downward within 20 degrees of the local vertical at all times. This objective has been successfully accomplished by the satellite's passive gravity-gradient attitude stabilization system. (Author).

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 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 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 A Generalized Approach to Gravity gradient Stabilization of Gyrostat Satellites written by Richard W. Longman and published by . This book was released on 1969 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rapid Initial Attitude Control of a Gravity Gradient Earth Satellite written by Gerald John Adams and published by . This book was released on 1967 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Perturbations of a Gravity Gradient Stabilization System written by Richard Henry Frick and published by . This book was released on 1965 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: Satellite attitude stabilization systems utilizing the gradient of the earth's gravitational field have the advantage of being completely passive (i.e., no power is required). However, the stabilizing moments developed are extremely small and as a result such systems are subject to attitude perturbations from sources which would ordinarily be neglected in the evaluation of an active stabilization system. This memorandum investigates certain of these sources of attitude perturbation including micro-meteoroid impact, solar radiation pressure, stationkeeping propulsion, orbital eccentricity, and on-board rotating machinery. In the analysis, formulas are developed which determine the magnitude of the pitch, roll and yaw perturbations resulting from each of the above sources. Application of these results to an assumed vehicle configuration shows that the resulting attitude perturbations can be of the order of several degrees. While these perturbations do not necessarily rule out gravity gradient stabilization, their magnitudes for a given vehicle configuration should be considered for their compatibility with the mission requirements. (Author).

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 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 Stabilization of a Rod like Gravity gradient Earth Satellite written by Gerald Olali Diete-Spiff and published by . This book was released on with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Spacecraft Flight Control System Design Selection Process for a Geostationary Communication Satellite written by C. Barret and published by . This book was released on 1992 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spacecraft Attitude Dynamics and Control written by Vladimir A. Chobotov and published by Krieger Publishing Company. This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents the basic concepts, methods and mathematical developments which are necessary to understand spacecraft attitude dynamics and control. This book contains essential elements of kinematics, rigid body dynamics, linear control theory, environmental effects, and the theory of the stability of motion.

Download or read book The Application of Gravity Gradient Stabilization to Satellites in Highly Elliptic Orbits written by Robert Edgar Lohfeld and published by . This book was released on 1972 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: