Download or read book MagnetoRheological Dampers for Mass and Energy Sensitive Applications written by Mohammad Mehdi Naserimojarad and published by . This book was released on 2018 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: MagnetoRheological (MR) dampers have been used as reliable electronically adjustable shock and motion control devices in the past few years. Although these dampers have proven their performance in practice and the cost has decreased, their usage has been limited to high-end applications. The main drawback of MR dampers is their relatively large weight and energy consumption when compared to their passive counterparts. In this thesis, we investigate factors affecting weight and energy consumption of MR dampers and devise solutions to achieve energy-efficient and light-weight dampers. To this end, an analytic approach is presented to design and build a low-energy consumption and lightweight MR damper. It is shown that the proposed configuration can decrease the mass of MR damper significantly and reduce the energy consumption when AlNiCo alloys are utilized in the magnetic core. A proof-of-concept MR damper for mountain bike applications is designed, fabricated, characterized, and tested in the field, which meets the requirements in mountain bike industry in terms of energy consumption, compression and rebound forces, mass, size, and on-the-fly adjustability of the damping forces, by the user.
Download or read book Characterization and Application of Magneto sensitive Soft Materials written by Zhili Zhang and published by Frontiers Media SA. This book was released on 2023-09-29 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magneto-sensitive soft materials are new synthetic functional materials that is normally composed of ferromagnetic or ferrimagnetic particles (size in a range from several nanometers to hundreds of micrometers), carriers (including water, organic solvent, liquids, gels, polymer and foams), surfactants and necessary additives. Being different from “hard” solid materials, “soft” means magneto-sensitive materials exist in the form of colloidal liquids, gels, and elastomers, such as magnetic fluids (MF), also called ferrofluids, magnetic liquids, magnetorheological fluids (MRF), magnetorheological gels (MRG), magnetorheological elastomers (MRE) and magnetorheological foams (MRFoam), so as to possess fluidity and magnetism simultaneously and can be easily deformed by applying external magnetic field force.
Download or read book Insight into Magnetorheological Shock Absorbers written by Janusz Gołdasz and published by Springer. This book was released on 2014-12-27 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with magnetorheological fluid theory, modeling and applications of automotive magnetorheological dampers. On the theoretical side a review of MR fluid compositions and key factors affecting the characteristics of these fluids is followed by a description of existing applications in the area of vibration isolation and flow-mode shock absorbers in particular. As a majority of existing magnetorheological devices operates in a so-called flow mode a critical review is carried out in that regard. Specifically, the authors highlight common configurations of flow-mode magnetorheological shock absorbers, or so-called MR dampers that have been considered by the automotive industry for controlled chassis applications. The authors focus on single-tube dampers utilizing a piston assembly with one coil or multiple coils and at least one annular flow channel in the piston.
Download or read book Heating Effects on Magnetorheological Dampers written by Geoffroy Larrecq and published by . This book was released on 2010 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past decades, scientists and engineers have tried to develop and improve various devices and control systems in order to mitigate and prevent civil structures against external dynamic forces such as strong wind and earthquakes. Indeed, damping devices absorb and dissipate the energy input during an earthquake, for instance and thus make structures safer and stable. Many types of devices are currently used such as viscous, friction or tuned mass dampers; however, one of the most recent promising systems proposed is the Magnetorheological damper (MR damper). Because of their ability to be controlled and to adapt their mechanical properties by varying a magnetic field, their high damping force (200kN), their low energy input required and their simple use and implementation in buildings, MR dampers seem to be suitable and realistic for civil engineering application. However, when they are subjected to external dynamic forces, the temperature increase in the damper device may significantly alter their performances and behaviors. This thesis first presents an overview of different technology control systems and MR damper device properties. Then, several mathematical models are developed and applied to explain the behavior of this class of damper. Finally, a study of the heating effects on MR damper performances incorporated in a real structure (3DOF) will be simulated.
Download or read book DEVELOPING NEW ANALYTICAL AND NUMERICAL MODELS FOR MR FLUID DAMPERS AND THEIR APPLICATION TO SEISMIC DESIGN OF BUILDINGS written by esteki Kambiz and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Dissipation and Vibration Control Modeling Algorithm and Devices written by Gangbing Song and published by MDPI. This book was released on 2018-04-27 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Energy Dissipation and Vibration Control: Modeling, Algorithm and Devices" that was published in Applied Sciences
Download or read book Magnetorheological Fluid Technology written by Seung-Bok Choi and published by CRC Press. This book was released on 2012-11-08 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetorheological Fluid Technology: Applications in Vehicle Systems compiles the authors’ recent work involving the application of magnetorheological (MR) fluids and other smart materials in vehicles. It collects concepts that have previously been scattered in peer-reviewed international journals. After introducing the physical phenomena and properties of MR fluids, the book presents control methodologies for effectively controlling vehicle devices and systems featuring MR fluids. The authors also introduce the hysteresis identification of MR fluid and discuss its application through the adoption of the Preisach and polynomial models. They then describe the application of MR-equipped suspension systems in passenger, tracked, and railway vehicles; the application of MR brake systems in passenger vehicles, motorcycles, and bicycles; and the application of several MR technologies in heavy vehicles. The final chapter explores the use of haptic technologies for easily operating vehicle instruments and achieving optimal gear shifting with accelerator pedals. Assuming some technical and mathematical background in vibration, dynamics, and control, this book is designed for scientists and engineers looking to create new devices or systems for vehicles featuring controllable MR fluids. It is also suitable for graduate students who are interested in the dynamic modeling and control methodology of vehicle devices and systems associated with MR fluid technology.
Download or read book Synthesis Characterization and Applications of Magneto Responsive Functional Materials written by Yancheng Li and published by Frontiers Media SA. This book was released on 2021-08-10 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Insight Into Magnetorheological Shock Absorbers written by Janusz Go Dasz and published by . This book was released on 2015-01-31 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Application of Nonlinear Dissipative Device in Structural Vibration Control written by Zheng Lu and published by MDPI. This book was released on 2018-08-21 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue " Development and Application of Nonlinear Dissipative Device in Structural Vibration Control" that was published in Applied Sciences
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 Nonlinear Dynamics Volume 1 written by Gaetan Kerschen and published by Springer. This book was released on 2016-04-22 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonlinear Dynamics, Volume 1. Proceedings of the 34th IMAC, A Conference and Exposition on Dynamics of Multiphysical Systems: From Active Materials to Vibroacoustics, 2016, the fi rst volume of ten from the Conference, brings together contributions to this important area of research and engineering. Th e collection presents early fi ndings and case studies on fundamental and applied aspects of Structural Dynamics, including papers on: • Nonlinear Oscillations • Nonlinear Modal Analysis • Nonlinear System Identifi cation • Nonlinear Modeling & Simulation • Nonlinearity in Practice • Nonlinearity in Multi-Physics Systems • Nonlinear Modes and Modal Interactions
Download or read book Application of Magneto rheological Dampers to Control Dynamic Response of Buildings written by Md Ferdous Iqbal and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthquakes usually cause huge casualty due to the ground shaking and also due to the failure of built infrastructure such as buildings and bridges. Therefore, it is necessary to control the response of these structures to avoid collapse during earthquake. At present, various control technology is available. Among them semi-active control devices using Magneto-rheological (MR) fluid dampers are promising because of their stability and low power requirement. In this research, performance of three different models of MR dampers, namely RD-1005-3, SD-1000 and MRD-9000 is studied by integrating them into different building structures subjected to different earthquake forces. Here, the dampers and the structures are modeled numerically using the finite element method. It is found that all of the dampers are capable of controlling the response of building frames for different earthquakes. Damper performance is also investigated from the energy point of view. It is found that dampers have the capability of increasing the energy dissipation capacity of a structure without changing the structural properties such as stiffness. It is also found that this type of damper is able to provide some protection even if power supply systems fail during dynamic excitation, which is very common during earthquake. A detailed investigation is carried out to find the optimum location of dampers in simple building frames. It is observed that the performance of the dampers is highly sensitive to the location. Therefore it is very important to investigate the performance of damper before application in a real structure.
Download or read book Twelve Lectures on Structural Dynamics written by André Preumont and published by Springer Science & Business Media. This book was released on 2014-07-08 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text addresses the modeling of vibrating systems with the perspective of finding the model of minimum complexity which accounts for the physics of the phenomena at play. The first half of the book (Ch.1-6) deals with the dynamics of discrete and continuous mechanical systems; the classical approach emphasizes the use of Lagrange's equations. The second half of the book (Ch.7-12) deals with more advanced topics, rarely encountered in the existing literature: seismic excitation, random vibration (including fatigue), rotor dynamics, vibration isolation and dynamic vibration absorbers; the final chapter is an introduction to active control of vibrations. The first part of this text may be used as a one semester course for 3rd year students in Mechanical, Aerospace or Civil Engineering. The second part of the text is intended for graduate classes. A set of problems is provided at the end of every chapter. The author has a 35 years experience in various aspects of Structural dynamics, both in industry (nuclear and aerospace) and in academia; he was one of the pioneers in the field of active structures. He is the author of several books on random vibration, active structures and structural control.
Download or read book Optimal Design of Magnetorheological Dampers Constrained in a Specific Volume Using Response Surface Method written by Armin Hadadian and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Implementation of Energy Generated Magneto rheological Damper for Vehicle Suspension Systems written by Raju Ahamed and published by . This book was released on 2015 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magneto rheological (MR) fluid based dampers are very promising for semi-active or adaptive suspension control system which is filled with MR fluid. Its huge advantages attract the researchers to use it in more advanced application. MR damper's damping force can be controlled by changing the viscosity of its internal magneto-rheological fluids (MRF). However the requirement of external power source is one of the major concerns. Self-powered MR damper is one of the recent advancement which is accomplished only for double ended MR damper. In this work an energy generated mono tube MR damper has been designed and investigated with power generation which has a huge demand in the vehicle suspension system. This damper combines the advantages of energy harvesting (reusing wasted energy) and MR damping (controllable damping force). This multifunctional integration would bring great benefits such as energy saving, size and weight reduction, lower cost, high reliability, and less maintenance for the MR damper systems. The proposed MR damper model consists permanent magnet and coil combination of energy generation. Two magnetic fields are induced inside this damper. One is in the outer coil of the power generator and another is the piston head coils. A 2-D Axisymmetric model of energy generated MR damper is developed in COMSOL Multiphysics where it is analyzed extensively by finite element method and its hardware model is tested by Universal Testing Machine (UTM). The complete magnetic isolation between these two fields is accomplished here, which can be seen in the finite element analysis and damper characteristic analysis. The energy generation ability of the MR damper model is tested by UTM and oscilloscope combination and the maximum output voltage is measured around 0.8 volts by oscilloscope. Finally, experimental dampers characteristic analysis is performed by using RD-8041-1 MR Damper. These results are compared with the hardware model experimental results, which clearly validate the hardware model damper characteristic.
Download or read book The Shock and Vibration Bulletin written by and published by . This book was released on 1976-08 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
