Search results for: acs-without-an-attitude

ACS Without an Attitude

Author : Harold L. Hallock
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This book de-emphasizes the formal mathematical description of spacecraft on-board attitude and orbit applications in favor of a more qualitative, concept-oriented presentation of these topics. The information presented in this book was originally given as a set of lectures in 1999 and 2000 instigated by a NASA Flight Software Branch Chief at Goddard Space Flight Center. The Branch Chief later suggested this book. It provides an approachable insight into the area and is not intended as an essential reference work. ACS Without an Attitude is intended for programmers and testers new to the field who are seeking a commonsense understanding of the subject matter they are coding and testing in the hope that they will reduce their risk of introducing or missing the key software bug that causes an abrupt termination in their spacecraft’s mission. In addition, the book will provide managers and others working with spacecraft with a basic understanding of this subject.

Fault Diagnosis of Nonlinear Systems Using a Hybrid Approach

Author : Ehsan Sobhani-Tehrani
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Theincreasingcomplexityofspacevehiclessuchassatellites,andthecostreduction measures that have affected satellite operators are increasingly driving the need for more autonomy in satellite diagnostics and control systems. Current methods for detecting and correcting anomalies onboard the spacecraft as well as on the ground are primarily manual and labor intensive, and therefore, tend to be slow. Operators inspect telemetry data to determine the current satellite health. They use various statisticaltechniques andmodels,buttheanalysisandevaluation ofthelargevolume of data still require extensive human intervention and expertise that is prone to error. Furthermore, for spacecraft and most of these satellites, there can be potentially unduly long delays in round-trip communications between the ground station and the satellite. In this context, it is desirable to have onboard fault-diagnosis system that is capable of detecting, isolating, identifying or classifying faults in the system withouttheinvolvementandinterventionofoperators.Towardthisend,theprinciple goal here is to improve the ef?ciency, accuracy, and reliability of the trend analysis and diagnostics techniques through utilization of intelligent-based and hybrid-based methodologies.

Fundamentals of Spacecraft Attitude Determination and Control

Author : F. Landis Markley
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This book explores topics that are central to the field of spacecraft attitude determination and control. The authors provide rigorous theoretical derivations of significant algorithms accompanied by a generous amount of qualitative discussions of the subject matter. The book documents the development of the important concepts and methods in a manner accessible to practicing engineers, graduate-level engineering students and applied mathematicians. It includes detailed examples from actual mission designs to help ease the transition from theory to practice and also provides prototype algorithms that are readily available on the author’s website. Subject matter includes both theoretical derivations and practical implementation of spacecraft attitude determination and control systems. It provides detailed derivations for attitude kinematics and dynamics and provides detailed description of the most widely used attitude parameterization, the quaternion. This title also provides a thorough treatise of attitude dynamics including Jacobian elliptical functions. It is the first known book to provide detailed derivations and explanations of state attitude determination and gives readers real-world examples from actual working spacecraft missions. The subject matter is chosen to fill the void of existing textbooks and treatises, especially in state and dynamics attitude determination. MATLAB code of all examples will be provided through an external website.

Spaceflight Mechanics 2004

Author : American Astronautical Society
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The FLP Microsatellite Platform

Author : Jens Eickhoff
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This book represents the Flight Operations Manual for a reusable microsatellite platform – the “Future Low-cost Platform” (FLP), developed at the University of Stuttgart, Germany. It provides a basic insight on the onboard software functions, the core data handling system and on the power, communications, attitude control and thermal subsystem of the platform. Onboard failure detection, isolation and recovery functions are treated in detail. The platform is suited for satellites in the 50-150 kg class and is baseline of the microsatellite “Flying Laptop” from the University. The book covers the essential information for ground operators to controls an FLP-based satellite applying international command and control standards (CCSDS and ECSS PUS). Furthermore it provides an overview on the Flight Control Center in Stuttgart and on the link to the German Space Agency DLR Ground Station which is used for early mission phases. Flight procedure and mission planning chapters complement the book.

ATS 6 final engineering performance report

Author :
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Georg Luk acs

Author : Judith Marcus
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The Hungarian social philosopher and literary critic Georg Lukcs (1885-1971) is one of the seminal intellectual figures of the twentieth century. With the possible exception of Leon Trotsky, he is also widely recognized as the outstanding Marxist thinker aside from Marx himself. Yet, as Lewis Coser has observed, Lukcs has remained the most enigmatic figure of the modern communist movement. Why were his theories so important to modern political and social thought? How did he come to have such influence on so many distinguished Western Intellectuals, and for such a long time? And why, despite this, did so many of his writings infuriate contemporary readers and critics? The centenary of Lukcs birth was celebrated in 1985 with symposia in a number of countries on several continents. Hundreds of Lukcs scholars and students attended, along with others who were interested in his time and his ideas, as well as the man and his work. In the process, new understanding of some of his most controversial concepts, ideas, and theses emerged. Newly discovered information and writings, as well as previously unknown preocupations in his seventy-year intellectual career were shared. This volume brings together some of the best and most original of the essays of participants in New York, Paris, Budapest, and Mexico City. Some of the contributions in this volume are sharply critical of Lukcs; others are clearly admiring. A great many take an objective but severe look at diverse aspects of his work. Together they constitute a close examination of the life work of the man Thomas Mann once called "The most important literary critic of today," Jean-Paul Sartre hailed as a significant modern philosopher," and Irving Howe declared "a major force in European intellectual life." Collectively, this volume shows why Georg Lukcs remains one of the remarkable intellectual figures of the twentieth century, whose work is of enduring significance for us today. Judith Marcus is on the faculty of Kenyon College. She is the author of Thomas Mann and Lukcs. Zoltn Tarrwas visiting Fulbright Scholar to Budapest, Hungary, and has taught sociology and history at the City College of CUNY, New School for Social Research, and Rutgers University. He is author of The Frankfurt School, The Critical Theories of Max Horkheimer and Theodor W. Adorno.

Spacecraft Dynamics and Control

Author : Marcel J. Sidi
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This 1997 book explains basic theory of spacecraft dynamics and control and the practical aspects of controlling a satellite.

A collection of the 21st AIAA International Communications Satellite Systems Conference and Exhibit technical papers

Author : American Institute of Aeronautics and Astronautics
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IAF91 476 IAF91 530

Author :
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Automatic Control in Space

Author : C. W. Munday
File Size : 63.16 MB
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Automatic Control in Space is a compendium of papers presented on the Eighth IFAC Symposium that took place in Oxford, England in July 1979. The book is comprised of an assortment of presentations prepared by experts in the fields of engineering, computer science, robotics, optics, aeronautics, and other allied disciplines discussing various aspects and types of automatic control systems and applications used in space technology. The text covers a broad range of topics on space technology, such as stabilization systems for space telescopes and balloon platforms; spacecraft attitude estimation and space navigation; and various control algorithms for different motion stabilization problems. Robotic systems; automatic control for large space transportations; and a path selection system for an autonomous Martian roving vehicle are presented as well. The text will be of high interest for engineers, computer scientists, physicists, inventors, astronomers, and various experts in space technology.

Transtage ACS Attitude Control System Valve Storage Tests

Author : John E. Branigan
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The Attitude Control Systems (ACS) for the Transtage vehicle were procured in quantities sufficient to satisfy the usage rate for a number of years. The components for the system were stored 'on the shelf' until needed. The Air Force Space and Missile Systems Organization (SAMSO) requested that the Air Force Rocket Propulsion Laboratory (AFRPL) concurrently store a number of similar valves for a period of five years, with annual performance tests which could be used to determine the effects of shelf storage and to provide confidence in the performance of the valves. The objective of the test program was to provide SAMSO with test data on the effects of shelf storage on the Transtage ACS Valve performance.

Automatic Control in Aerospace

Author :
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Study of an Attitude Control System for the Astronaut Maneuvering Unit

Author : W. E. Drissel
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Study of an Attitude Control System for the Astronaut Maneuvering Unit Final Report Dec 1963 Jul 1964

Author :
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Preprints Conference on Attitude and Orbit Control Systems

Author :
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Pulsed Plasma Thrusters for Small Spacecraft Attitude Control

Author :
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93 2575 93 2615

Author :
File Size : 73.3 MB
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A Collection of the AIAA International Communications Satellite Systems Conference and Exhibit Technical Papers

Author :
File Size : 20.88 MB
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A Control Moment Gyro CMG Based Attitude Control System ACS for Agile Small Satellites

Author : Vaios J Lappas
File Size : 27.70 MB
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