Semiactive Control Policies

Author: Sany Ihsan
Publisher: LAP Lambert Academic Publishing
ISBN: 9783844384178
Category :
Languages : en
Pages : 140

Book Description
Comprehensive comparison on quarter-car, half-car and full-car models were conducted to analyze the effect of using semiactive control policies, namely skyhook, groundhook and hybrid controls, in improving ride quality of passenger vehicle. Sprung mass acceleration, suspension deflection and tire deflection responses were analyzed for measurements of ride quality, rattle-space and road holding. Three different analyses were conducted on each model; frequency-domain transfer function analysis, time-domain transient state and steady state analysis. Results shows that hybrid control policy gives significant improvements in most responses while at the same time it does not compromise road holding ability of vehicle. Further quantitative comparison of responses on all three models shows that quarter-car model is unable to accurately represent responses in full-car model. Half-car model gives reasonable representation of full-car model in some states. RMS analysis conducted on a H-car 2-DOF system shows good agreement to the previous work on Q-car 2-DOF. This book should benefit researchers working in the area of semiactive control of vehicle suspension system.

Active Control of Structures

Author: Andre Preumont
Publisher: John Wiley & Sons
ISBN: 0470715715
Category : Science
Languages : en
Pages : 312

Book Description
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.

Technology of Semiactive Devices and Applications in Vibration Mitigation

Author: Fabio Casciati
Publisher: John Wiley & Sons
ISBN: 0470022906
Category : Science
Languages : en
Pages : 268

Book Description
Researchers have studied many methods of using active and passive control devices for absorbing vibratory energy. Active devices, while providing significant reductions in structural motion, typically require large (and often multiply-redundant) power sources, and thereby raise concerns about stability. Passive devices are fixed and cannot be modified based on information of excitation or structural response. Semiactive devices on the other hand can provide significant vibration reductions comparable to those of active devices but with substantially reduced power requirements and in a stable manner. Technology of Semiactive Devices and Applications in Vibration Mitigation presents the most up-to-date research into semiactive control systems and illustrates case studies showing their implementation and effectiveness in mitigating vibration. The material is presented in a way that people not familiar with control or structural dynamics can easily understand. Connecting structural dynamics with control, this book: Provides a history of semiactive control and a bibliographic review of the most common semiactive control strategies. Presents state-of-the-art semiactive control systems and illustrates several case studies showing their implementation and effectiveness to mitigate vibration. Illustrates applications related to noise attenuation, wind vibration damping and earthquake effects mitigation amongst others. Offers a detailed comparison between collocated and non-collocated systems. Formulates the design concepts and control algorithms in simple and readable language. Includes an appendix that contains critical considerations about semiactive devices and methods of evaluation of the original damping of a structure. Technology of Semiactive Devices and Applications in Vibration Mitigation is a must-have resource for researchers, practitioners and design engineers working in civil, automotive and mechanical engineering. In addition it is undoubtedly the key reference for all postgraduate students studying in the field.

Semi-Active Suspension Control Design for Vehicles

Author: Sergio M. Savaresi
Publisher: Elsevier
ISBN: 0080966799
Category : Technology & Engineering
Languages : en
Pages : 241

Book Description
Semi-Active Suspension Control Design for Vehicles presents a comprehensive discussion of designing control algorithms for semi-active suspensions. It also covers performance analysis and control design. The book evaluates approaches to different control theories, and it includes methods needed for analyzing and evaluating suspension performances, while identifying optimal performance bounds. The structure of the book follows a classical path of control-system design; it discusses the actuator or the variable-damping shock absorber, models and technologies. It also models and discusses the vehicle that is equipped with semi-active dampers, and the control algorithms. The text can be viewed at three different levels: tutorial for novices and students; application-oriented for engineers and practitioners; and methodology-oriented for researchers. The book is divided into two parts. The first part includes chapters 2 to 6, in which fundamentals of modeling and semi-active control design are discussed. The second part includes chapters 6 to 8, which cover research-oriented solutions and case studies. The text is a comprehensive reference book for research engineers working on ground vehicle systems; automotive and design engineers working on suspension systems; control engineers; and graduate students in control theory and ground vehicle systems. Appropriate as a tutorial for students in automotive systems, an application-oriented reference for engineers, and a control design-oriented text for researchers that introduces semi-active suspension theory and practice Includes explanations of two innovative semi-active suspension strategies to enhance either comfort or road-holding performance, with complete analyses of both Also features a case study showing complete implementation of all the presented strategies and summary descriptions of classical control algorithms for controlled dampers

Semi-active Suspension Control

Author: Emanuele Guglielmino
Publisher: Springer Science & Business Media
ISBN: 1848002319
Category : Technology & Engineering
Languages : en
Pages : 302

Book Description
Semi-active Suspension Control provides an overview of vehicle ride control employing smart semi-active damping systems. These systems are able to tune the amount of damping in response to measured vehicle-ride and handling indicators. Two physically different dampers (magnetorheological and controlled-friction) are analysed from the perspectives of mechatronics and control. Ride comfort, road holding, road damage and human-body modelling are studied. Mathematical modelling is balanced by a large and detailed section on experimental implementation, where a variety of automotive applications are described offering a well-rounded view. The implementation of control algorithms with regard to real-life engineering constraints is emphasised. The applications described include semi-active suspensions for a saloon car, seat suspensions for vehicles not equipped with a primary suspension, and control of heavy-vehicle dynamic-tyre loads to reduce road damage and improve handling.

Analysis of Semiactive Control Policies for Passenger Vehicles

Author: Sany Izan Ihsan
Publisher:
ISBN:
Category : Motor vehicles
Languages : en
Pages : 310

Book Description

Passive and Active Structural Vibration Control in Civil Engineering

Author: T.T. Soong
Publisher: Springer
ISBN: 3709130123
Category : Computers
Languages : en
Pages : 380

Book Description
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.

Structural Control for Civil and Infrastructure Engineering

Author: Fabio Casciati
Publisher: World Scientific
ISBN: 9789812811707
Category : Technology & Engineering
Languages : en
Pages : 616

Book Description
Structural control represents a high technology proposal for civil engineering innovation. This book collects the invited papers presented at the 3rd International Workshop on Structural Control. The geographical coverage and the high quality of the invited speaker's contributions make the book a unique update in the areas of intelligent structures, structural control and smart materials for civil and infrastructure engineers. Contents: An Identification Algorithm for Feedback Active Control (N D Anh); Application of Control Techniques to Masonry and Monumental Constructions (A Baratta et al.); Monitoring of Infrastructures in the Marine Environment (A Del Grosso); Health Monitoring and Optimum Maintenance Programs for Structures in Seismic Zones (L Esteva & E Heredia-Zavoni); Outline of Safety Evaluation of Structural Response-Control Buildings and Smart Structural Systems as Future Trends (K Yoshikazu & T Hiroyuki); Recent Developments in Smart Structures Research in India (S Narayanan & V Balamurugan); Perspective of Application of Active Damping of Cable Structures (A Preumont & F Bossens); Parametric and Nonparametric Adaptive Identification of Nonlinear Structural Systems (A W Smyth et al.); Active Control Requirements in Railway Projects (H Wenzel); and other papers. Readership: Civil engineers and scientists working in the areas of intelligent systems and smart materials.

The 4th International Workshop on Structural Control

Author: Andrew Smyth
Publisher: DEStech Publications, Inc
ISBN: 9781932078459
Category : Technology & Engineering
Languages : en
Pages : 334

Book Description
Presents the research and applications on sensing technologies to monitor and control the structure and health of buildings, bridges, installations, and other constructed facilities.

Vibration Control of Active Structures

Author: A. Preumont
Publisher: Springer Science & Business Media
ISBN: 0306484226
Category : Technology & Engineering
Languages : en
Pages : 376

Book Description
My objective in writing this book was to cross the bridge between the structural dynamics and control communities, while providing an overview of the potential of SMART materials for sensing and actuating purposes in active vibration c- trol. I wanted to keep it relatively simple and focused on systems which worked. This resulted in the following: (i) I restricted the text to fundamental concepts and left aside most advanced ones (i.e. robust control) whose usefulness had not yet clearly been established for the application at hand. (ii) I promoted the use of collocated actuator/sensor pairs whose potential, I thought, was strongly underestimated by the control community. (iii) I emphasized control laws with guaranteed stability for active damping (the wide-ranging applications of the IFF are particularly impressive). (iv) I tried to explain why an accurate pred- tion of the transmission zeros (usually called anti-resonances by the structural dynamicists) is so important in evaluating the performance of a control system. (v) I emphasized the fact that the open-loop zeros are more difficult to predict than the poles, and that they could be strongly influenced by the model trun- tion (high frequency dynamics) or by local effects (such as membrane strains in piezoelectric shells), especially for nearly collocated distributed actuator/sensor pairs; this effect alone explains many disappointments in active control systems.