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Author : D. M. Schrello
Publisher :
ISBN 13 :
Total Pages : 96 pages
Book Rating : 4.30/5 ( download)
Download or read book Passive Aerodynamic Attitude Stabilization of Near Earth Satellites written by D. M. Schrello and published by . This book was released on 1961 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : D. M. Schrello
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.69/5 ( download)
Download or read book Passive Aerodynamic Attitude Stabilization of Near Earth Satellites written by D. M. Schrello and published by . This book was released on 1961 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 163 pages
Book Rating : 4.00/5 ( download)
Download or read book PASSIVE AERODYNAMIC ATTITUDE STABILIZATION OF NEAR EARTH SATELLITES. VOLUME I. LIBRATIONS DUE TO COMBINED AERODYNAMIC AND GRAVITATIONAL TORQUES. written by and published by . This book was released on 1961 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: The general equations governing the angular motion of a rigid satellite are investigated for the case where both gravitational and aerodynamic torques are included, and where the atmosphere is assumed to be spherically symmetric but rotating. For a non-spinning, axisymmetric satellite, the vehicle is characterized by 3 dimensionless aerodynamic parameters and one inertia parameter. A Fourier series expansion of the coefficients of the equations gives equations of the nonhomogeneous Hill type. The complete equations of motion are solved for a circular orbit. Atmospheric rotation induces a steady-state yawing motion preventing yaw equilibrium from being achieved for other than equatorial orbits. The effects of configuration and orbit parameters are examined. Gravity gradients generally will not dominate until altitudes of 300-400 mi are achieved. At lower altitudes small amounts of aerodynamic stability suffice to override the gravitational torques.
Author : D. M. Schrello
Publisher :
ISBN 13 :
Total Pages : 162 pages
Book Rating : 4.35/5 ( download)
Download or read book Passive Aerodynamic Attitude Stabilization of Near Earth Satellites written by D. M. Schrello and published by . This book was released on 1961 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 97 pages
Book Rating : 4.53/5 ( download)
Download or read book PASSIVE AERODYNAMIC ATTITUDE STABILIZATION OF NEAR EARTH SATELLITES. VOLUME 3. MATHEMATICAL TECHNIQUES AND COMPUTER PROGRAM. written by and published by . This book was released on 1961 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: A computer program is presented which integrates numerically the pitch equation of an aerodynamically stabilized satellite. The mathematical theory of the linear second order equation with periodic coefficients and the integration procedure are discussed to clarify the structure and application of the program.
Download or read book Nouvelle méthode contenant une explication claire et facile des particules written by and published by . This book was released on 1723 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Rangaswamy Ravindran
Publisher : National Library of Canada
ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.86/5 ( download)
Download or read book Optimal Aerodynamic Attitude Stabilization of Near Earth Satellites written by Rangaswamy Ravindran and published by National Library of Canada. This book was released on 1971 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: A near Earth satellite orbiting in the altitude range of 15 km to 450 km encounters small but non-negligible aerodynamic forces. It is possible to generate sufficient aerodynamic torques by providing 'all-moving' control surfaces of suitable size to achieve active attitude control. This report is a preliminary study of such an active attitude control system. The satellite configuration considered has four all-moving control surfaces and the dominant gravity gradient torques and aerodynamic torques are considered in the analysis. The resulting equations of motion are linearized and modern optimal control theory concepts are applied to synthesize a feedback control surfaces to obtain the necessary control torques. The numerical studies carried out indicate that it is possible to control a near Earth satellite by using control surfaces of reasonable size. Damping times of the order of from a few orbits to a fraction of an orbit seem reasonable. (Author).
Author : Peter Moll Barba
Publisher :
ISBN 13 :
Total Pages : 67 pages
Book Rating : 4.57/5 ( download)
Download or read book Problems in Passive Attitude Stabilization of Earth Satellites written by Peter Moll Barba and published by . This book was released on 1967 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : S. Fred Singer
Publisher : Elsevier
ISBN 13 : 032316238X
Total Pages : 277 pages
Book Rating : 4.88/5 ( download)
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.
Author : Mohammed Chessab Mahdi
Publisher : Cambridge Scholars Publishing
ISBN 13 : 152752163X
Total Pages : 190 pages
Book Rating : 4.36/5 ( download)
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.
