Download or read book Integrated Passive and Active Control of Structures written by Vernon H. Neubert and published by . This book was released on 1993 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: A combination of passive damping and active control is needed on practical structures where sufficient modal damping is not achievable with passive damping alone. The modal theories for structural equations in state space are reviewed and some eigenvector relationship are presented which are not available elsewhere, for use later in the report. Methods for determining sensitivities of eigenvalues land eigenvectors to plant matrix and control inputs are summarized and numerical examples are presented. Procedures are developed for optimizing passive damping through use of the sensitivities of the eigenproperties, for free vibration and forced, random vibrations. Frequency- dependent behavior of viscoelastic damping material by curve-fitting is discussed, which is then used in an overdamped mini-oscillator technique for analysis of an example ten-bar truss. Two approaches are presented for designing the combination of passive viscous damping and full state feedback control. The first is iterative and makes use of eigenvalue sensitivities. The second is based on a perturbation formulation, where the desired changes in eigenvalues and eigenvectors are specified and the corresponding changes in the closed loop characteristic matrix in state space are predicted. Restrictions on the choice of eigenvalues and eigenvectors are discussed in light of related literature on eigenstructure assignment. Fortran computer programs, one coupled with the constrained function minimization program CONMIN, have been written for each type of problem. Space structures, Passive damping, Active control, Analysis, Numerical examples.
Download or read book Integrated Passive and Active Control of Structures written by and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A combination of passive damping and active control is needed on practical structures where sufficient modal damping is not achievable with passive damping alone. The modal theories for structural equations in state space are reviewed and some eigenvector relationship are presented which are not available elsewhere, for use later in the report. Methods for determining sensitivities of eigenvalues land eigenvectors to plant matrix and control inputs are summarized and numerical examples are presented. Procedures are developed for optimizing passive damping through use of the sensitivities of the eigenproperties, for free vibration and forced, random vibrations. Frequency- dependent behavior of viscoelastic damping material by curve-fitting is discussed, which is then used in an overdamped mini-oscillator technique for analysis of an example ten-bar truss. Two approaches are presented for designing the combination of passive viscous damping and full state feedback control. The first is iterative and makes use of eigenvalue sensitivities. The second is based on a perturbation formulation, where the desired changes in eigenvalues and eigenvectors are specified and the corresponding changes in the closed loop characteristic matrix in state space are predicted. Restrictions on the choice of eigenvalues and eigenvectors are discussed in light of related literature on eigenstructure assignment. Fortran computer programs, one coupled with the constrained function minimization program CONMIN, have been written for each type of problem. Space structures, Passive damping, Active control, Analysis, Numerical examples.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Control of Structures written by U. Leipholz and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an outgrowth of several years of teaching and research of the two authors in the field of structural dynamics and control. The content of the book is based on structural dynamics, classical and modern control theory and involves also recent developments that took place with respect to the control of systems with distri buted masses. It is hoped that the book will serve the researcher and the practicing engineer in the areas of ci vi 1, mechanical and aeronautical engineering. It may also be of interest to applied mathematicians and to physicists. There is no question that the book can be used as a reference book for advanced courses in the above mentioned areas. The numerous examples will provide students with the necessary material for exercising themselves and for self studying. Thanks are due to Mrs. Cynthia Jones for preparing patiently and competently the typescript of the book. The services of Mrs. Linda Strouth, Solid Mechanics Division, University of Waterloo, rendered in producing the camera-ready copy of the book with great skill and devotion, are gratefully acknowledged. Special thanks go to Mr. Ir. Ad. C. Plaizier, at Martinus Nijhoff/Dr. W. Junk, who with much understanding and enthusiasm supervised the production of the book as Publisher. May the readers of it enjoy it, and may they have the fee ling of having gained something in turning to it and using it.
Download or read book Passive and Active Control of Structures written by Julio Cesar Maldonado-Mercado and published by . This book was released on 1995 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Passive and Active Structural Vibration Control in Civil Engineering written by T.T. Soong and published by Springer. This book was released on 2014-05-04 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Base isolation, passive energy dissipation and active control represent three innovative technologies for protection of structures under environmental loads. Increasingly, they are being applied to the design of new structures or to the retrofit of existing structures against wind, earthquakes and other external loads. This book, with contributions from leading researchers from Japan, Europe, and the United States, presents a balanced view of current research and world-wide development in this exciting and fast expanding field. Basic principles as well as practical design and implementational issues associated with the application of base isolation systems and passive and active control devices to civil engineering structures are carefully addressed. Examples of structural applications are presented and extensively discussed.
Download or read book Design Optimization of Active and Passive Structural Control Systems written by Lagaros, Nikos D. and published by IGI Global. This book was released on 2012-08-31 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: A typical engineering task during the development of any system is, among others, to improve its performance in terms of cost and response. Improvements can be achieved either by simply using design rules based on the experience or in an automated way by using optimization methods that lead to optimum designs. Design Optimization of Active and Passive Structural Control Systems includes Earthquake Engineering and Tuned Mass Damper research topics into a volume taking advantage of the connecting link between them, which is optimization. This is a publication addressing the design optimization of active and passive control systems. This title is perfect for engineers, professionals, professors, and students alike, providing cutting edge research and applications.
Download or read book Active Structural Control written by T. T. Soong and published by Longman Scientific and Technical. This book was released on 1990 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active Control of Structures written by Andre Preumont and published by John Wiley & Sons. This book was released on 2008-11-20 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: With Active Control of Structures, two global pioneers present the state-of-the-art in the theory, design and application of active vibration control. As the demand for high performance structural systems increases, so will the demand for information and innovation in structural vibration control; this book provides an effective treatise of the subject that will meet this requirement. The authors introduce active vibration control through the use of smart materials and structures, semi-active control devices and a variety of feedback options; they then discuss topics including methods and devices in civil structures, modal analysis, active control of high-rise buildings and bridge towers, active tendon control of cable structures, and active and semi-active isolation in mechanical structures. Active Control of Structures: Discusses new types of vibration control methods and devices, including the newly developed reduced-order physical modelling method for structural control; Introduces triple high-rise buildings connected by active control bridges as devised by Professor Seto; Offers a design strategy from modelling to controller design for flexible structures; Makes prolific use of practical examples and figures to describe the topics and technology in an intelligible manner.
Download or read book Control and Dynamic Systems V52 Integrated Technology Methods and Applications in Aerospace Systems Design written by C.T. Leonides and published by Elsevier. This book was released on 2012-12-02 with total page 563 pages. Available in PDF, EPUB and Kindle. Book excerpt: Control and Dynamic Systems: Advances in Theory and Applications, Volume 52: Integrated Technology Methods and Applications in Aerospace System Design discusses the various techniques and applications in aerospace systems. This book presents automation and integration techniques in optimizing aircraft structural design. It also covers a number of technologies used in aerospace systems such as active flutter suppression, flight control configuration, aeroassisted plane change missions, flight control systems, and impaired aircraft. This book concludes by demonstrating some modeling issues in command, control, and communication networks. This book is a significant reference source for engineers involved in aerospace systems design.
Download or read book First World Conference on Structural Control written by and published by . This book was released on 1994 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active and Passive Smart Structures and Integrated Systems 2016 written by Gyuhae Park and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active and Passive Vibration Control of Structures written by Peter Hagedorn and published by Springer. This book was released on 2014-10-20 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Active and Passive Vibration Control of Structures form an issue of very actual interest in many different fields of engineering, for example in the automotive and aerospace industry, in precision engineering (e.g. in large telescopes), and also in civil engineering. The papers in this volume bring together engineers of different background, and it fill gaps between structural mechanics, vibrations and modern control theory. Also links between the different applications in structural control are shown.
Download or read book NASA DOD Controls structures Interaction Technology 1989 written by and published by . This book was released on 1989 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Controls structures Interaction Guest Investigator Program written by Rudeen Smith-Taylor and published by . This book was released on 1993 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active Control of Bidirectional Structural Vibration written by Wen Yu and published by Springer Nature. This book was released on 2020-06-05 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on safeguarding civil structures and residents from natural hazards such as earthquakes through the use of active control. It proposes novel proportional-derivative (PD) and proportional-integral-derivative (PID) controllers, as well as discrete-time sliding mode controllers (DSMCs) for the vibration control of structures involving nonlinearities. Fuzzy logic techniques are used to compensate for nonlinearities. The first part of the book addresses modelling and feedback control in inelastic structures and presents a design for PD/PID controllers. In the second part, classical PD/PID and type-2 fuzzy control techniques are combined to compensate for uncertainties in the structures of buildings. The methodology for tuning the gains of PD/PID is obtained using Lyapunov stability theory, and the system’s stability is verified. Lastly, the book puts forward a DSMC design that does not require system parameters, allowing it to be more flexibly applied. All program codes used in the paper are presented in a MATLAB®/Simulink® environment. Given its scope, the book will be of interest to mechanical and civil engineers, and to advanced undergraduate and graduate engineering students in the areas of structural engineering, structural vibration, and advanced control.
Download or read book Integrated Passive Active Vibration Absorber for Multi Story Buildings written by National Aeronautics and Space Adm Nasa and published by . This book was released on 2018-10-22 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Passive isolator, active vibration absorber, and an integrated passive/active (hybrid) control are studied for their effectiveness in reducing structural vibration under seismic excitations. For the passive isolator, a laminated rubber bearing base isolator which has been studied and used extensively by researchers and seismic designers is considered. An active vibration absorber concept, which can provide guaranteed closed-loop stability with minimum knowledge of the controlled system, is used to reduce the passive isolator displacement and to suppress the top floor vibration. A three-story building model is used for the numerical simulation. The performance of an active vibration absorber and a hybrid vibration controller in reducing peak structural responses is compared with the passively isolated structural response and with absence of vibration control systems under the N00W component of El Centro 1940 and N90W component of the Mexico City earthquake excitation records. The results show that the integrated passive/active vibration control system is most effective in suppressing the peak structural acceleration for the El Centro 1940 earthquake when compared with the passive or active vibration absorber alone. The active vibration absorber, however, is the only system that suppresses the peak acceleration of the structure for the Mexico City 1985 earthquake. Lee-Glauser, Gina J. and Ahmadi, Goodarz and Horta, Lucas G. Langley Research Center RTOP 233-01-03...
