EBookClubs

Read Books & Download eBooks Full Online

EBookClubs

Read Books & Download eBooks Full Online

Book Modeling and Control of Large Flexible Space Structures

Download or read book Modeling and Control of Large Flexible Space Structures written by Jayant V. Ramakrishnan and published by . This book was released on 1988 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Modeling and Robust Control of Large Flexible Space Structures microform

Download or read book Modeling and Robust Control of Large Flexible Space Structures microform written by Benoit Boulet and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1996 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book On the Modeling and Control of Flexible Space Structures

Download or read book On the Modeling and Control of Flexible Space Structures written by Bong Wie and published by . This book was released on 1981 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Control of Large Flexible Space Structures

Download or read book Control of Large Flexible Space Structures written by Suresh M. Joshi and published by Springer. This book was released on 2014-03-12 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a research monograph that addresses the basic issues in controlling large, flexible space structures (LFSS), and presents some controller synthesis methods developed by the author. The main problem considered is that of controller synthesis for precision attitude control and vibration suppression in LFSS. The bulk of the book presents two basic approaches for controller synthesis: 1. a class of "dissipative" controllers which utilize collocated actuators and sensors, and 2. a class of model-based compensators. The book will serve to stimulate research activity in control theory with application to LFSS, and will be very useful to researchers, practising engineers, academic faculty, and students in control and aerospace sciences. The background required of the reader is familiarity with basic control theory including state variable methods, which is generally attained at the first-year postgraduate level.

Book Large Space Structures Dynamics and Control

Download or read book Large Space Structures Dynamics and Control written by S.N. Atluri and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph is intended to provide a snapshot of the status and opportunities for advan cement in the technologies of dynamics and control oflarge flexible spacecraft structures. It is a reflection ofthe serious dialog and assessments going on all over the world,across a wide variety of scientific and technical disciplines, as we contemplate the next major milestone in mankind's romance with space: the transition from exploration and experimentation to commercial and defense exploitation. This exploitation is already in full swing in the space communications area. Both military and civilian objectives are being pursued with increasingly more sophisticated systems such as large antenna reflectors with active shape control. Both the NATO and Warsaw pact alliances are pursuing permanent space stations in orbit: large structural systems whose development calls for in-situ fabrication and/or assembly and whose operation will demand innovations in controls technology. The last ten years have witnessed a fairly brisk research activity in the dynamics and control oflarge space structures in orderto establish a technology base forthe development of advanced spacecraft systems envisioned for the future. They have spanned a wide spectrum of activity from fundamental methods development to systems concept studies and laboratory experimentation and demonstrations. Some flight experiments have also been conducted for various purposes such as the characterization of the space enviroment, durability of materials and devices in that environment, assembly and repair operations, and the dynamic behavior of flexible structures. It is this last area that has prompted this monogram.

Book Special Issue on System Modeling and Control of Flexible Space Structures

Download or read book Special Issue on System Modeling and Control of Flexible Space Structures written by Jer-Nan Juang and published by . This book was released on 1983 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Modeling and Control of Large Flexible Vehicles in the Atmosphere and Space

Download or read book Modeling and Control of Large Flexible Vehicles in the Atmosphere and Space written by and published by . This book was released on 1987 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary of major research findings in three topical areas: 1) traveling wave concepts in the dynamics and control of Large Space Structures, 2) passive damping in Large Space Structures Applications, and 3) active control of rigid and flexible Manipulator Arms. The traveling wave concepts for characterizing the dynamics of flexible structures have introduced an alternative to modal synthesis and established a basis for the development of new controls algorithms. Passive damping studies identified various types of damping mechanisms including thermoelastic, and electromagnetic, and quantified their relative contributions. The active control studies generated a number of algorithms and control strategies and demonstration applications.

Book The Dynamics and Control of Large Flexible Space Structures Part 10

Download or read book The Dynamics and Control of Large Flexible Space Structures Part 10 written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-23 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: A mathematical model is developed to predict the dynamics of the proposed orbiting Spacecraft Control Laboratory Experiment (SCOLE) during the station keeping phase. The equations of motion are derived using a Newton-Euler formulation. The model includes the effects of gravity, flexibility, and orbital dynamics. The control is assumed to be provided to the system through the Shuttle's three torquers, and through six actuators located by pairs at two points on the mast and at the mass center of the reflector. The modal shape functions are derived using the fourth order beam equation. The generic mode equations are derived to account for the effects of the control forces on the modal shape and frequencies. The equations are linearized about a nominal equilibrium position. The linear regulator theory is used to derive control laws for both the linear model of the rigidized SCOLE as well as that of the actual SCOLE including the first four flexible modes. The control strategy previously derived for the linear model of the rigidized SCOLE is applied to the nonlinear model of the same configuration of the system and preliminary single axis slewing maneuvers conducted. The results obtained confirm the applicability of the intuitive and appealing two-stage control strategy which would slew the SCOLE system, as if rigid to its desired position and then concentrate on damping out the residual flexible motions. Bainum, Peter M. and Reddy, A. S. S. R. Unspecified Center MATHEMATICAL MODELS; PREDICTION ANALYSIS TECHNIQUES; SLEWING; SPACE SHUTTLE PAYLOADS; SPACECRAFT CONTROL; SPACECRAFT MANEUVERS; ACTIVE CONTROL; EQUATIONS OF MOTION; FLEXIBLE SPACECRAFT; GRAVITATIONAL EFFECTS; LINEAR QUADRATIC REGULATOR; REFLECTORS...

Book The Dynamics and Control of Large Flexible Space Structures

Download or read book The Dynamics and Control of Large Flexible Space Structures written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Rigid Flexible Coupling Dynamics and Control of Flexible Spacecraft with Time Varying Parameters

Download or read book Rigid Flexible Coupling Dynamics and Control of Flexible Spacecraft with Time Varying Parameters written by Jie Wang and published by Springer Nature. This book was released on 2021-09-15 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the dynamic modeling and attitude control of flexible spacecraft with time-varying parameters. The dynamic characteristics, vibration control methods and attitude stabilization methods for spacecraft are systematically studied in respects of the theoretical modeling, numerical simulation and the ground experiment. Three active control theories in complex mode space are presented for flexible space structures. Optimal slew strategies based on variable amplitudes input shaping methods and coupling control methods are proposed for stabilization of flexible spacecraft. The research provides an important way to solve the problem of high-precision attitude control of flexible spacecraft with time-varying parameters. This book is appropriate for the researchers who focus on the multi-body dynamics, attitude and vibration control of flexible spacecraft.

Book The Dynamics and Control of Large Flexible Space Structures

Download or read book The Dynamics and Control of Large Flexible Space Structures written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-11-06 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: A mathematical model is developed to predict the dynamics of the proposed Spacecraft Control Laboratory Experiment during the stationkeeping phase. The Shuttle and reflector are assumed to be rigid, while the mass connecting the Shuttle to the reflector is assumed to be flexible with elastic deformations small as compared with its length. It is seen that in the presence of gravity-gradient torques, the system assumes a new equilibrium position primarily due to the offset in the mass attachment point to the reflector from the reflector's mass center. Control is assumed to be provided through the Shuttle's three torquers and throught six actuators located by painrs at two points on the mass and at the reflector mass center. Numerical results confirm the robustness of an LQR derived control strategy during stationkeeping with maximum control efforts significantly below saturation levels. The linear regulator theory is also used to derive control laws for the linearized model of the rigidized SCOLE configuration where the mast flexibility is not included. It is seen that this same type of control strategy can be applied for the rapid single axis slewing of the SCOLE through amplitudes as large as 20 degrees. These results provide a definite trade-off between the slightly larger slewing times with the considerable reduction in over-all control effort as compared with the results of the two point boundary value problem application of Pontryagin's Maximum Principle. Bainum, Peter M. and Reddy, A. S. S. R and Diarra, Cheick M. and Li, Feiyue Unspecified Center...

Book High Performance Robust Control of Flexible Space Structures

Download or read book High Performance Robust Control of Flexible Space Structures written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-08 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many spacecraft systems have ambitious objectives that place stringent requirements on control systems. Achievable performance is often limited because of difficulty of obtaining accurate models for flexible space structures. To achieve sufficiently high performance to accomplish mission objectives may require the ability to refine the control design model based on closed-loop test data and tune the controller based on the refined model. A control system design procedure is developed based on mixed H2/H(infinity) optimization to synthesize a set of controllers explicitly trading between nominal performance and robust stability. A homotopy algorithm is presented which generates a trajectory of gains that may be implemented to determine maximum achievable performance for a given model error bound. Examples show that a better balance between robustness and performance is obtained using the mixed H2/H(infinity) design method than either H2 or mu-synthesis control design. A second contribution is a new procedure for closed-loop system identification which refines parameters of a control design model in a canonical realization. Examples demonstrate convergence of the parameter estimation and improved performance realized by using the refined model for controller redesign. These developments result in an effective mechanism for achieving high-performance control of flexible space structures. Whorton, M. S. Marshall Space Flight Center...