Download or read book A Theoretical Study of the Angular Motions of Spinning Bodies in Space written by Jerrold H. Suddath and published by . This book was released on 1961 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary: A theoretical study was made of the angular motions of spinning bodies in space. The analysis was based on Euler's dynamic equations which were linearized and solved analytically. The results of the study are directly applicable only to spin-stabilized vehicles with constant moments of inertia and angular displacements not exceeding about 15°. Simple analytical expressions were obtained which relate angular motions to spin-rate and inertia distributions for a given disturbance. Consideration was given to the effects produced by having artificial damping in the system. The study included numerical examples and comparisons of analytical solutions with machine solutions of exact dynamic equations. The analysis indicated that angular motions are sensitive to inertia distributions. In considering a rectangular-pulse pitching moment, it was found that the residual motion was very sensitive to the time at which the moment was removed. Artificial damping due to a perfect proportional control system seemed to be more advantageous to pencil-like configurations than to disk-like configurations.

Download or read book Theoretical Study of Angular Motions of Spinning Bodies in Space with List of References written by and published by . This book was released on 1961 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Technical Note written by and published by . This book was released on 1969 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1967 with total page 1352 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Technical Report written by and published by . This book was released on 1967 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Development of Zonal Centrifuges and Ancillary Systems for Tissue Fractionation and Analysis written by Norman Gulack Anderson and published by . This book was released on 1966 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Cancer Institute Monograph written by and published by . This book was released on 1966 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Report Jet Propulsion Laboratory California Institute of Technology written by Jet Propulsion Laboratory (U.S.) and published by . This book was released on 1966 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications Cumulative Index written by United States. Superintendent of Documents and published by . This book was released on 1980 with total page 1284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analytical Study of Soft Landings on Gas filled Bags written by Jack B. Esgar and published by . This book was released on 1960 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Use of an Inertia Sphere to Damp the Angular Motions of Spinning Space Vehicles written by Jerrold H. Suddath and published by . This book was released on 1962 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1961 with total page 1284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Approximate Solution of the Equations of Motion for Arbitrary Rotating Spacecraft written by Peter Ralph Kurzhals and published by . This book was released on 1967 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: The assumption of small changes in the inertia parameters has been used to derive approximate rotational equations of motion for arbitrary spinning spacecraft in the small angle and rate regime. Complex representations are introduced to define the rate and attitude errors produced by applied disturbances, and analytical solutions are obtained for the steady spinning mode and for the spin-up and despin mode. Solutions for the steady spinning mode consider both the uncontrolled and the controlled spacecraft motion for characteristic disturbance. These disturbances include initial errors, externally applied torques, and instantaneous and periodic mass motions within the spacecraft. The errors induced by the disturbances are described by the error component time histories and by vector traces of the complex error representations. Upper bounds of the errors are developed for the uncontrolled motion, and the required control techniques and control systems are examined for the controlled motion. Solutions for the spin-up and despin mode consider extensible spacecraft modules connected by struts or cables. Fuel consumption relations are derived for several extension techniques, and optimization of the extension techniques is shown to yield appreciable fuel savings. Comparisons of the analytical solutions and exact solutions obtained by numerical integration of the complete equations of motion are found to yield excellent agreement, and the applications of the approximate solution are illustrated for a manned orbital research laboratory and a large spinning space station.

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1973 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Study of an Active Control System for a Spinning Body written by James J. Adams and published by . This book was released on 1961 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spin Dynamics of Manned Space Stations written by Peter R. Kurzhals and published by . This book was released on 1963 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of the spin dynamics of manned space stations has been conducted. The rigid-body equations of motion for arbitrary rotating stations were outlined and programmed on an electronic data processing system. Docking impacts, attitude-system torques, mass unbalances, and transient crew motions were simulated in these equations, and a fourth-order Runge-Kutta integration procedure was used to determine the resultant station motion. A toroidal configuration spinning about the axis of maximum moment of inertia was selected for the computer study, and results are presented in nondimensional form. The results are given as the traces of the station axis of symmetry in fixed space and as the time histories of the nondimensional angular velocities and attitudes of the station. This representation provides a simple physical picture of the station motion and of the time variation of the primary motion coordinates. The results of this analysis indicated that the applied moments, mass unbalances, and crew motions produced undamped station wobbling, which to the crew would appear as a continuous rolling motion of the station floor. Since undamped rolling motions produced by the disturbances, when coupled with the station rotation, could possibly lead to nausea and disorientation of the crew, a means of damping these motions is desirable. For this study two damping systems were considered, a gyroscopic wobble damper and a proportional jet damper. These systems, in general, were able to minimize the effects of the station wobble on the crew by reducing the apparent rolling motions to a small tilt of the station floor. The gyroscopic damping system was more efficient than the proportional jet system for small wobble angles, but the jet system was more effective than the gyroscopic system for the large wobble angles.