Download or read book The Use of GPS for Evaluating Inertial Measurement Unit Errors written by and published by . This book was released on 1996 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: During missile flight tests, a trajectory reference system based on GPS can be used in place of conventional radars. Due to the high precision of GPS trajectory references, it is, therefore, possible to make use of them in order to evaluate missile inertial measurement unit performance. Before two recent launches of Hepingbaoweizhe (peacekeeper) missiles, GPS transmitters and three wave band antennas were installed on them. On the basis of GPS measurement ranges and range increment data, use was made of kalman wave filter methods to estimate individual IMU errors. Results clearly demonstrated that GPS is superior to radar.

Download or read book Flight Demonstration Results of an Inertial Measurement Unit and Global Positioning System Translator Telemetry System written by Bradford S. David and published by . This book was released on 2001-11-01 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. Army Research Laboratory (ARL) has been evaluating global positioning system (GPS) technology and strap-down inertial measurement units (IMUs) configured from inexpensive, miniature micro-electro-mechanical systems for the purposes of obtaining aerodynamics, trajectory reconstruction, and/or diagnostic information. A GPS translator from the Johns Hopkins University Applied Physics Laboratory and a low-cost IMU designed by ARL from commercial off-the-shelf components were combined with a telemetry system, packaged into a 2.75-inch HYDRA-70 rocket platform, and flight demonstrated. The onboard IMU sensors included accelerometers for measuring the thrust axis and lateral accelerations, angular rate sensors for measuring pitch and yaw rate, a dual axis magnetometer for roll rate and angular yawing motion, and sun-sensing optical sensors to provide a truth measurement for the rate sensor and magnetometer data. Hawk and Weibel tracking radars were also used as a truth measurement of the rocket's velocity and position for comparison to the acquired GPS data and integrated IMU accelerometer data. Results from comparisons of the IMU sensor data to the truth measurements suggest that reasonable aerodynamics and trajectory reconstruction can be achieved. The instrumentation system's development, calibration, demonstration, and the experimental results are described.

Download or read book Flight Demonstration Results of an Inertial Measurement Unit and Global Positioning System Translator Telemetry System written by and published by . This book was released on 2001 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. Army Research Laboratory (ARL) has been evaluating global positioning system (GPS) technology and strap-down inertial measurement units (IMUs) configured from inexpensive, miniature micro-electro-mechanical systems for the purposes of obtaining aerodynamics, trajectory reconstruction, and/or diagnostic information. A GPS translator from the Johns Hopkins University Applied Physics Laboratory and a low-cost IMU designed by ARL from commercial off-the-shelf components were combined with a telemetry system, packaged into a 2.75-inch HYDRA-70 rocket platform, and flight demonstrated. The onboard IMU sensors included accelerometers for measuring the thrust axis and lateral accelerations, angular rate sensors for measuring pitch and yaw rate, a dual axis magnetometer for roll rate and angular yawing motion, and sun-sensing optical sensors to provide a truth measurement for the rate sensor and magnetometer data. Hawk and Weibel tracking radars were also used as a truth measurement of the rocket's velocity and position for comparison to the acquired GPS data and integrated IMU accelerometer data. Results from comparisons of the IMU sensor data to the truth measurements suggest that reasonable aerodynamics and trajectory reconstruction can be achieved. The instrumentation system's development, calibration, demonstration, and the experimental results are described.

Download or read book Evaluation of Human Work written by John R. Wilson and published by CRC Press. This book was released on 2015-04-16 with total page 1018 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by experts with real-world experience in applying ergonomics methodology in a range of contexts, Evaluation of Human Work, Fourth Edition explores ergonomics and human factors from a "doing it" perspective. More than a cookbook of ergonomics methods, the book encourages students to think about which methods they should apply, when, and why.

Download or read book China s Strategic Modernization Implications for the United States written by Mark A. Stokes and published by DIANE Publishing. This book was released on with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conventional wisdom portrays the People's Republic of China (PRC) People's Liberation Army (PLA) as a backward continental force that will not pose a military challenge to its neighbors or to the United States well into the 21st century. PLA writings that demonstrate interest in exploiting the revolution in military affairs (RMA) are dismissed by a large segment of the PLA- watching community as wistful fantasies. The author offers an alternative perspective by outlining emerging PLA operational concepts and a range of research and development projects that appear to have been heavily influenced by U.S. and Russian writings on the RMA. Fulfillment of the PLA's vision for the 21st century could have significant repercussions for U.S. interests in the Asia-Pacific region.

Download or read book Strapdown Inertial Navigation Technology written by David Titterton and published by IET. This book was released on 2004 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inertial navigation is widely used for the guidance of aircraft, missiles ships and land vehicles, as well as in a number of novel applications such as surveying underground pipelines in drilling operations. This book discusses the physical principles of inertial navigation, the associated growth of errors and their compensation. It draws current technological developments, provides an indication of potential future trends and covers a broad range of applications. New chapters on MEMS (microelectromechanical systems) technology and inertial system applications are included.

Download or read book Positioning with GPS 1985 written by and published by . This book was released on 1985 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 2002 Assessment of the Office of Naval Research s Air and Surface Weapons Technology Program written by National Research Council and published by National Academies Press. This book was released on 2003-01-31 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Office of Naval Research (ONR) contracted with the Naval Studies Board (NSB) of the National Research Council (NRC) to establish a committee to review ONR's Air and Surface Weapons Technology (ASWT) program. The committee convened on May 14 and 15, 2002, and reviewed more than 20 science and technology (S&T) efforts that were presented as constituting the ASWT program. The committee then met separately on May 16, 2002, to formulate its findings and recommendations. This report represents the consensus views of the committee and is based on the information presented prior to and at the review, as well as on the committee members' accumulated experience and expertise in military operations, systems, and technologies.

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Computer Aided Algorithms Based on Mathematics and Machine Learning for Integrated GPS and INS Land Vehicle Navigation Systems written by Deepak Bhatt and published by . This book was released on 2014 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: An integrated navigation system consisting of INS and GPS is usually preferred due to the reduced dependency on GPS-only navigator in an area prone to poor signal reception or affected by multipath. The performance of the integrated system largely depends upon the quality of the Inertial Measurement Unit (IMU) and the integration methodology. Considering the restricted use of high grade IMU and their associated price, low-cost IMUs are becoming the preferred choice for civilian navigation purposes. MEMS based inertial sensors have made possible the development of civilian land vehicle navigation as it offers small size and low-cost. However, these low-cost inertial sensors possess high inherent sensor errors such as biases, drift, noises etc. As a result, the accuracy of the integrated system degrades rapidly in a GPS denied environment. Thus, an accurate in-lab calibration and modeling of inertial sensor errors become mandatory before being deployed. This dissertation introduces a Support Vector Regression (SVR) based IMU error modeling approach for improving the low-cost navigation system accuracy. A low-cost MEMS based IMU offered by cloud cap technology, Crista IMU is used to evaluate the SVR based error modeling approach effectiveness. Alternatively, the IMU derived navigation solution and GPS data is fused to output the more reliable navigation solution and model the errors in the inertial navigation solution simultaneously. This fusion and error modeling continues during the GPS signal availability. In the case of GPS outages, the developed error model is utilized to improve the integrated navigation system accuracy. Thus, in a continued effort to improve the standalone low-cost IMU derived navigation solution reliability during GPS outages, an intelligent technique utilizing neural networks and a hybrid of mathematics and support vector based fusion algorithms are proposed fusing INS and GPS data in an open and closed loop fashion. The performance of the proposed techniques and algorithm is evaluated using real field test data utilizing low-cost MEMS IMU, Crossbow IMU 300CC-100 and a Novatel OEM GPS receiver. The test results demonstrated the improved positioning accuracy in comparison to existing techniques and showed a substantial reduction in standalone Inertial Navigation System (INS) position error drift during GPS outages. Further, a feasibility of statistical based approaches consisting of Cubist, Random Forest and Support Vector Regression is evaluated for a low-cost INS and GPS integrated system. Through experimental demonstration, Random forest regression was found to be a suitable candidate for INS and GPS data fusion as it offers the least training time and ability to tuned the parameter automatically.

Download or read book Applied Mathematics in Integrated Navigation Systems written by Robert M. Rogers and published by AIAA. This book was released on 2003 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Descripción dele ditor: "The subject of integrated navigation systems covered in this book is designed for those directly involved with the design, integration, and test and evaluation of navigation systems. It is assumed that the reader has a background in mathematics, including calculus. Integrated navigation systems are the combination of an onboard navigation solution (position, velocity, and attitude) and independent navigation data (aids to navigation) to update or correct navigation solutions. In this book, this combination is accomplished with Kalman filter algorithms. Elements of basic mathematics, kinematics, equations describing navigation systems/sensors and their error models, aids to navigation, and Kalman filtering are developed. Detailed derivations are presented and examples are given to aid in the understanding of these elements of integrated navigation systems. Problems are included to expand the application of the materials presented. The third edition includes additional background material, exercises and software. The added material includes: development of general form for Earth's gravitational potential with simplification to an ellipsoid model; development of satellite orbital equations for position and velocity and the impact of non-spherical earth gravitation on satellite orbital parameters; and illustrations in the development of derivative-free Kalman filters including the Unscented and Divided Difference filter forms. Additional exercises are included that expand and supplement the material in the text and demonstrate properties of the Kalman filter. Additional software is included in this edition for simulating random processes and derivative-free filter implementations. This edition provides a more complete foundation for addressing the different aspects of integrated navigation systems.This BookApplied Mathematics in Integrated Navigation Systems, Third Edition coverCopyright © 2007 by the American Institute of Aeronautics and Astronautics, Inc.https://doi.org/10.2514/4.861598Supplemental MaterialsPricesHardbackMember: $74.95List: $94.95Not an AIAA Member? Join today and start saving!Site Tools Sign up for e-alerts RSS" (ARC).

Download or read book Record written by and published by . This book was released on 2004 with total page 824 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Automatic Control in Aerospace 1989 written by T. Nishimura and published by Elsevier. This book was released on 2014-05-23 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers presented at the Symposium covered the areas in aerospace technology where automatic control plays a vital role. These included navigation and guidance, space robotics, flight management systems and satellite orbital control systems. The information provided reflects the recent developments and technical advances in the application of automatic control in space technology.

Download or read book China Satellite Navigation Conference CSNC 2014 Proceedings Volume I written by Jiadong Sun and published by Springer Science & Business. This book was released on 2014-04-22 with total page 793 pages. Available in PDF, EPUB and Kindle. Book excerpt: China Satellite Navigation Conference (CSNC) 2014 Proceedings presents selected research papers from CSNC2014, held on 21-23 May in Nanjing, China. The theme of CSNC2014 is 'BDS Application: Innovation, Integration and Sharing'. These papers discuss the technologies and applications of the Global Navigation Satellite System (GNSS) and the latest progress made in the China BeiDou System (BDS) especially. They are divided into 9 topics to match the corresponding sessions in CSNC2014, which broadly covered key topics in GNSS. Readers can learn about the BDS and keep abreast of the latest advances in GNSS techniques and applications. SUN Jiadong is the Chief Designer of the Compass/ BDS, and the Academician of Chinese Academy of Sciences (CAS); JIAO Wenhai is a researcher at China Satellite Navigation Office; WU Haitao is a professor at Navigation Headquarters, CAS; LU Mingquan is a professor at Department of Electronic Engineering of Tsinghua University.

Download or read book Global Positioning System written by Bradford W. Parkinson and published by AIAA. This book was released on 1996 with total page 830 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessing the Accuracy of Remotely Sensed Data written by Russell G. Congalton and published by CRC Press. This book was released on 2019-08-08 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past 10 years have brought amazing changes to the technologies used to turn remotely sensed data into maps. As a result, the principles and practices necessary for assessing the accuracy of those maps have also evolved and matured. This third edition of Assessing the Accuracy of Remotely Sensed Data: Principles and Practices is thoroughly updated and includes five new chapters. Now 15 chapters long, this text is the only one of its kind to provide geospatial analysts with the requisite considerations, tools, and theory necessary to conduct successful and efficient map accuracy assessments; and map users with the knowledge to fully understand the assessment process to ensure effective use of maps. See What’s New in the Third Edition: All original chapters have been updated to include new standards, practices, and methodologies. A new chapter on planning accuracy assessments. A new chapter on assessing maps created using object-based technologies. Two case study chapters - one showcasing the assessment of maps created from traditional methods, and one on the assessment of object-based maps. Emphasis on considering and planning for positional accuracy in concert with thematic accuracy. An appendix containing the internationally recognized ASPRS Positional Accuracy Standards. A new final chapter summarizing the key concepts, considerations and lessons learned by the authors in their decades of implementing and evaluating accuracy assessments. Assessing map accuracy is complex; however, the discussions in this book, together with the many figures, tables, and case studies, clearly present the necessary concepts and considerations for conducting an assessment that is both is practical, statistically reliable, and achievable.

Download or read book Introduction to Multicopter Design and Control written by Quan Quan and published by Springer. This book was released on 2017-06-23 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the first textbook specially on multicopter systems in the world. It provides a comprehensive overview of multicopter systems, rather than focusing on a single method or technique. The fifteen chapters are divided into five parts, covering the topics of multicopter design, modeling, state estimation, control, and decision-making. It differs from other books in the field in three major respects: it is basic and practical, offering self-contained content and presenting hands-on methods; it is comprehensive and systematic; and it is timely. It is also closely related to the autopilot that users often employ today and provides insights into the code employed. As such, it offers a valuable resource for anyone interested in multicopters, including students, teachers, researchers, and engineers. This introductory text is a welcome addition to the literature on multicopter design and control, on which the author is an acknowledged authority. The book is directed to advanced undergraduate and beginning graduate students in aeronautical and control (or electrical) engineering, as well as to multicopter designers and hobbyists. ------- Professor W. Murray Wonham, University of Toronto "This is the single best introduction to multicopter control. Clear, comprehensive and progressing from basic principles to advanced techniques, it's a must read for anyone hoping to learn how to design flying robots." ------- Chris Anderson, 3D Robotics CEO.