Download or read book Precision Attitude Control of Symmetric Spinning Bodies written by Kenneth Roy Lorell and published by . This book was released on 1973 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Precision Attitude Control of Symmetric Spinning Bodies written by K. R. Lorell and published by . This book was released on 1971 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Motivated by the arc-second pointing requirement of the Unsupported Gyroscope experiment and other satellite applications, this research investigates the problems associated with the precision attitude control of symmetric spinning bodies. An attitude control system is synthesized and then is studied by analog simulation. Controller performance and limitations are evaluated, using a laboratory model called the Spinning Vehicle Simulator (SVS). A technique devised at Stanford University in 1966 that simplifies the design of spinning-vehicle attitude controllers is used to select controller gains. The resulting system, simulated on an analog computer, produces excellent response characteristics and is insensitive to vehicle parameter or gain changes. The magnitude of the attitude error is shown to have zero-frequency and spin-frequency components proportional to the magnitude of body-fixed and inertially fixed moments, respectively. (Author).

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Precision Magnetic Attitude Control of Spinning Spacecraft written by John A. Sorensen and published by . This book was released on 1969 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 Attitude Control of an Axially Symmetric Rigid Body Under Failure written by Ronald Eric Knudsen and published by . This book was released on 1971 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: The response of an axially symmetric, extended rigid body to a failure in one control effector is analyzed. The failure produces an unknown constant disturbance force and moment which induces cross-axis coupling that seriously degrades the author response. The cross coupling makes it necessary to consider the three attitude axes simultaneously. Nonlinear equations of motion are required because large amplitude attitude changes are of interest. The principal problem considered is to synthesize an attitude control system which can respond to the failure by modifying its structure and parameters on-line to improve its attitude control. (Author).

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 Monthly Catalog of United States Government Publications written by and published by . This book was released on 1961 with total page 1274 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1974 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Method for Approximating the Vacuum Motions of Spinning Symmetrical Bodies with Nonconstant Spin Rates written by C. William Martz and published by . This book was released on 1961 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The analysis includes nonconstant spin rates and inertias and considers the effects of time-varying thrust misalinements, mass unbalance, and jet damping. The method was developed for bodies having small transverse angular velocities. Results are presented in the form of equations for space-referenced Euler angles, flight-path angles, body-referenced attitude rates, and earth-referenced vehicle-trajectory coordinates. Also, equations for maximum wobble have been derived for certain input conditions. Comparisons with numerical solutions are included for two sample problems.

Download or read book Spacecraft Dynamics and Control written by Marcel J. Sidi and published by Cambridge University Press. This book was released on 1997 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 1997 book explains basic theory of spacecraft dynamics and control and the practical aspects of controlling a satellite.

Download or read book Guidance and Control written by and published by . This book was released on 1988 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Selected Listing of NASA Scientific and Technical Reports for written by and published by . This book was released on 1960 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Scientific and Technical Reports written by United States. National Aeronautics and Space Administration Scientific and Technical Information Division and published by . This book was released on 1966 with total page 1440 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements written by and published by . This book was released on 1971-11-25 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Index written by and published by . This book was released on 1971 with total page 1734 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Readout axis Stability of Elastic Nearly Spherical Gyro Rotors written by William Norman Blanchard and published by . This book was released on 1971 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Precision autocollimator readout of nearly spherical free-rotor gyroscopes, using a reflecting optical flat, requires that the normal to the flat be aligned with the rotor axis of maximum inertia and that the alignment remains stable during gyro operation. The normal to the flat is defined as the readout axis of the instrument; angular misalignments between the normal and the axis of maximum inertia are called 'flat position errors.' In previous research, initial alignment to within 2 arcseconds has been achieved; however, rotor flat-position errors were found to vary significantly when the gyro spin speed or temperature was changed. This investigation studies the variations as elastic phenomena so that the accuracy and stability of readout-axis orientation in arbitrary free-rotor gyroscopes can be understood. (Author).