Download or read book Optimal Docking to Tumbling Objects with Uncertain Properties written by David Charles Sternberg (Ph. D.) and published by . This book was released on 2017 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Active debris removal (ADR), on-orbit servicing and in-space assembly likely require proximity operations and soft docking between two or more satellites. These operations can be complicated by the presence of several challenges, including 1) flexible dynamics, 2) impending collision with other proximity objects, 3) uncooperative satellites, 4) tumbling behavior, 5) uncertainty in the knowledge of this tumble, and 6) the need to maneuver at least one of the satellites through an accelerated approach trajectory. This thesis considers challenges 3 through 6 by addressing the terminal approach and soft docking by a Chaser satellite to a passively tumbling, rigid-body Target. The terminal approach is characterized by the Chaser starting at an initial position several meters away from the Target and aligned with the Target’s docking port. It then initializes its inward motion relative to the Target to maintain its position synchronous (i.e., maintaining alignment with the body-fixed frame of the Target’s docking port) with the tumbling motion. Using a fuel-efficient trajectory, it traverses along the docking port’s body-fixed approach axis by creating the requisite tangential and radial accelerations associated with the Target’s tumble. Finally, the Chaser docks with a sufficiently low impact velocity to avoid damage to itself or the Target. This thesis addresses three important aspects of this Synchronous Docking to a Tumbling Target (SDTT) problem, with examples drawn from this ADR mission scenario. First, a methodology is developed to define whether a Chaser can feasibly execute this terminal approach to a Target when that Target’s tumbling motion is measured a priori with some known degree of uncertainty. Given the potential urgency in deriving the approach trajectory, a robust and computationally efficient minimum fuel trajectory solver is formulated. This solver is based upon the recognition that fuel optimality requires that the tangential and radial accelerations of the Chaser be equal as it traverses the terminal approach. Since these accelerations are dictated by the Target’s uncertain tumbling motion, a Multiple Model optimization technique is used to provide robustness in the trajectory. The result is a methodology that can assess the feasibility of achieving a soft dock of a known Chaser with a Target whose motion is uncertain. Second, this feasibility framework can be used to analyze two Chaser scenarios. The first entails the design of a new Chaser that can capture a broad sub-set of the Target population (Market Capture), while the second entails the determination of the fraction of a Target population, with uncertain dynamics, to which an existing Chaser can feasibly soft dock (Market Analysis). Both scenarios consider levels of uncertainty in the knowledge of the motion of individual Targets in the population that is inherently associated with remote sensing. Third, 0-g simulations are required to obtain predictions of Chaser performance, since this SDTT problem leads to Chasers that conduct multi-axis accelerations uncharacteristic of conventional satellites. A simulation framework that supports both unconstrained 0-g and constrained 1-g performance prediction to flight is developed. The development and validation of key dynamics and environmental factors for both environments are presented. As a result, this research provides a computationally efficient, low-order solver for rapidly deriving a terminal approach trajectory that is both fuel optimal as well as robust to uncertainty in the measurement of the Target’s dynamics. Furthermore, a methodology is provided that permits evaluation of the design of a Chaser that can feasibly dock with a desired fraction of the Target population before committing to the cost and effort of developing that Chaser (Market Capture) as well as those Targets to which an existing Chaser can feasibly dock before committing to the time and fuel consumption needed to rendezvous with those Targets (Market Analysis). Finally, a ground test methodology for Chasers that must execute multi-axis accelerated trajectories is presented to minimize the impact of Chaser 0-g modeling errors on the performance of SDTT operations.
Download or read book Automated Rendezvous and Docking of Spacecraft written by Wigbert Fehse and published by Cambridge University Press. This book was released on 2003-11-13 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive reference for space engineers on rendezvous and docking/berthing (RVD/B) related issues, this book answers key questions such as: How does the docking vehicle accurately approach the target spacecraft? What technology is needed aboard the spacecraft to perform automatic rendezvous and docking, and what systems are required by ground control to supervise this process? How can the proper functioning of all rendezvous-related equipment, systems and operations be verified before launch? The book provides an overview of the major issues governing approach and mating strategies, and system concepts for rendezvous and docking/berthing. These issues are described and explained such that aerospace engineers, students and even newcomers to the field can acquire a basic understanding of RVD/B. The author would like to extend his thanks to Dr Shufan Wu, GNC specialist and translator of the book's Chinese edition, for his help in the compilation of these important errata.
Download or read book Journal of Guidance Control and Dynamics written by and published by . This book was released on 2008 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Blindsight written by Peter Watts and published by Macmillan. This book was released on 2006-10-03 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hugo and Shirley Jackson award-winning Peter Watts stands on the cutting edge of hard SF with his acclaimed novel, Blindsight Two months since the stars fell... Two months of silence, while a world held its breath. Now some half-derelict space probe, sparking fitfully past Neptune's orbit, hears a whisper from the edge of the solar system: a faint signal sweeping the cosmos like a lighthouse beam. Whatever's out there isn't talking to us. It's talking to some distant star, perhaps. Or perhaps to something closer, something en route. So who do you send to force introductions with unknown and unknowable alien intellect that doesn't wish to be met? You send a linguist with multiple personalities, her brain surgically partitioned into separate, sentient processing cores. You send a biologist so radically interfaced with machinery that he sees x-rays and tastes ultrasound. You send a pacifist warrior in the faint hope she won't be needed. You send a monster to command them all, an extinct hominid predator once called vampire, recalled from the grave with the voodoo of recombinant genetics and the blood of sociopaths. And you send a synthesist—an informational topologist with half his mind gone—as an interface between here and there. Pray they can be trusted with the fate of a world. They may be more alien than the thing they've been sent to find. At the Publisher's request, this title is being sold without Digital Rights Management Software (DRM) applied.
Download or read book Sophie s World written by Jostein Gaarder and published by Farrar, Straus and Giroux. This book was released on 2007-03-20 with total page 735 pages. Available in PDF, EPUB and Kindle. Book excerpt: A page-turning novel that is also an exploration of the great philosophical concepts of Western thought, Jostein Gaarder's Sophie's World has fired the imagination of readers all over the world, with more than twenty million copies in print. One day fourteen-year-old Sophie Amundsen comes home from school to find in her mailbox two notes, with one question on each: "Who are you?" and "Where does the world come from?" From that irresistible beginning, Sophie becomes obsessed with questions that take her far beyond what she knows of her Norwegian village. Through those letters, she enrolls in a kind of correspondence course, covering Socrates to Sartre, with a mysterious philosopher, while receiving letters addressed to another girl. Who is Hilde? And why does her mail keep turning up? To unravel this riddle, Sophie must use the philosophy she is learning—but the truth turns out to be far more complicated than she could have imagined.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1988 with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analytical Mechanics of Space Systems written by Hanspeter Schaub and published by AIAA. This book was released on 2003 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Planning Algorithms written by Steven M. LaValle and published by Cambridge University Press. This book was released on 2006-05-29 with total page 844 pages. Available in PDF, EPUB and Kindle. Book excerpt: Planning algorithms are impacting technical disciplines and industries around the world, including robotics, computer-aided design, manufacturing, computer graphics, aerospace applications, drug design, and protein folding. Written for computer scientists and engineers with interests in artificial intelligence, robotics, or control theory, this is the only book on this topic that tightly integrates a vast body of literature from several fields into a coherent source for teaching and reference in a wide variety of applications. Difficult mathematical material is explained through hundreds of examples and illustrations.
Download or read book Modern Robotics written by Kevin M. Lynch and published by Cambridge University Press. This book was released on 2017-05-25 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: A modern and unified treatment of the mechanics, planning, and control of robots, suitable for a first course in robotics.
Download or read book Scientific Computing An Introduction using Maple and MATLAB written by Walter Gander and published by Springer Science & Business. This book was released on 2014-04-23 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific computing is the study of how to use computers effectively to solve problems that arise from the mathematical modeling of phenomena in science and engineering. It is based on mathematics, numerical and symbolic/algebraic computations and visualization. This book serves as an introduction to both the theory and practice of scientific computing, with each chapter presenting the basic algorithms that serve as the workhorses of many scientific codes; we explain both the theory behind these algorithms and how they must be implemented in order to work reliably in finite-precision arithmetic. The book includes many programs written in Matlab and Maple – Maple is often used to derive numerical algorithms, whereas Matlab is used to implement them. The theory is developed in such a way that students can learn by themselves as they work through the text. Each chapter contains numerous examples and problems to help readers understand the material “hands-on”.
Download or read book Space Shuttle Missions Summary NASA TM 2011 216142 written by Robert D. Legler and published by www.Militarybookshop.CompanyUK. This book was released on 2011-09-01 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Full color publication. This document has been produced and updated over a 21-year period. It is intended to be a handy reference document, basically one page per flight, and care has been exercised to make it as error-free as possible. This document is basically "as flown" data and has been compiled from many sources including flight logs, flight rules, flight anomaly logs, mod flight descent summary, post flight analysis of mps propellants, FDRD, FRD, SODB, and the MER shuttle flight data and inflight anomaly list. Orbit distance traveled is taken from the PAO mission statistics.
Download or read book The Things They Carried written by Tim O'Brien and published by HarperCollins. This book was released on 2009-10-13 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: A classic work of American literature that has not stopped changing minds and lives since it burst onto the literary scene, The Things They Carried is a ground-breaking meditation on war, memory, imagination, and the redemptive power of storytelling. The Things They Carried depicts the men of Alpha Company: Jimmy Cross, Henry Dobbins, Rat Kiley, Mitchell Sanders, Norman Bowker, Kiowa, and the character Tim O’Brien, who has survived his tour in Vietnam to become a father and writer at the age of forty-three. Taught everywhere—from high school classrooms to graduate seminars in creative writing—it has become required reading for any American and continues to challenge readers in their perceptions of fact and fiction, war and peace, courage and fear and longing. The Things They Carried won France's prestigious Prix du Meilleur Livre Etranger and the Chicago Tribune Heartland Prize; it was also a finalist for the Pulitzer Prize and the National Book Critics Circle Award.
Download or read book Orbital Mechanics for Engineering Students written by Howard D. Curtis and published by Elsevier. This book was released on 2009-10-26 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt: Orbital Mechanics for Engineering Students, Second Edition, provides an introduction to the basic concepts of space mechanics. These include vector kinematics in three dimensions; Newton’s laws of motion and gravitation; relative motion; the vector-based solution of the classical two-body problem; derivation of Kepler’s equations; orbits in three dimensions; preliminary orbit determination; and orbital maneuvers. The book also covers relative motion and the two-impulse rendezvous problem; interplanetary mission design using patched conics; rigid-body dynamics used to characterize the attitude of a space vehicle; satellite attitude dynamics; and the characteristics and design of multi-stage launch vehicles. Each chapter begins with an outline of key concepts and concludes with problems that are based on the material covered. This text is written for undergraduates who are studying orbital mechanics for the first time and have completed courses in physics, dynamics, and mathematics, including differential equations and applied linear algebra. Graduate students, researchers, and experienced practitioners will also find useful review materials in the book. NEW: Reorganized and improved discusions of coordinate systems, new discussion on perturbations and quarternions NEW: Increased coverage of attitude dynamics, including new Matlab algorithms and examples in chapter 10 New examples and homework problems
Download or read book The International Space Station written by Robert C. Dempsey and published by Government Printing Office. This book was released on 2017 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Looks at the operations of the International Space Station from the perspective of the Houston flight control team, under the leadership of NASA's flight directors, who authored the book. The book provides insight into the vast amount of time and energy that these teams devote to the development, planning and integration of a mission before it is executed. The passion and attention to detail of the flight control team members, who are always ready to step up when things do not go well, is a hallmark of NASA human spaceflight operations. With tremendous support from the ISS program office and engineering community, the flight control team has made the International Space Station and the programs before it a success.
Download or read book Large Space Structures Systems in the Space Station Era written by and published by . This book was released on 1991 with total page 1042 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Artificial Intelligence Robotics and Automation in Space written by Centre national d'études spatiales (France) and published by . This book was released on 1992 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tethered Space Robot written by Panfeng Huang and published by Academic Press. This book was released on 2017-10-29 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tethered Space Robot: Dynamics, Measurement, and Control discusses a novel tethered space robot (TSR) system that contains the space platform, flexible tether and gripper. TSR can capture and remove non-cooperative targets such as space debris. It is the first time the concept has been described in a book, which describes the system and mission design of TSR and then introduces the latest research on pose measurement, dynamics and control. The book covers the TSR system, from principle to applications, including a complete implementing scheme. A useful reference for researchers, engineers and students interested in space robots, OOS and debris removal. Provides for the first time comprehensive coverage of various aspects of tethered space robots (TSR) Presents both fundamental principles and application technologies including pose measurement, dynamics and control Describes some new control techniques, including a coordinated control method for tracking optimal trajectory, coordinated coupling control and coordinated approaching control using mobile tether attachment points
