Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 259 for “"damper"”.
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Real time tuned mass damper simulation system
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2003.
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Hydraulic damper design for a knee prosthesis
Thesis. 1975. B.S.--Massachusetts Institute of Technology. Dept. of Mechanical Engineering.
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Equilibria of a Gyrostat with a Discrete Damper
… of a gyrostat with a spring-mass-dashpot damper to gain new insights into the dynamics of spin-stabilized satellites. The equations of motion are developed using a Newton-Euler approach, resulting in equations in terms of system momenta and damper variables. Linear and nonlinear stability …
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Optimal passive nonlinear damper design methodology for road race application
… to develop a baseline passive nonlinear damper and inerter for road race application to maximize vehicle lateral acceleration is developed here using optimization techniques. The method includes use of equations-of-motion for suspension models, assembly of equations in a computer model …
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Vibration isolation systems using hysteretic multiple tuned mass damper oscillators
The subject of this study is the vibration isolation effect of linear and nonlinear hysteretic single degree of freedom oscillators attached to a structure. The system of oscillators, attached to the main structure, reduce the amplitude of its structural response, over a wide frequency band …
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Comparison of Linear, Nonlinear, Hysteretic, and Probabilistic MR Damper Models
Magnetorheolgical (MR) fluid dampers have the capability of changing their effective damping force depending on the current input to the damper. A number of factors in the construction of the damper, as well as the properties of the fluid and the electromagnet, create a dynamic response of the …
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An Invertible Open-Loop Nonlinear Dynamic Temperature Dependent MR Damper Model
A Magnetorheological damper is a commonly used component in semi-active suspensions that achieves a high force capacity and better performance than a passive system, without the added expense and power draw of a fully active system, all while maintaining failsafe performance. To fully exploit the …
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High performance damper optimization using computer simulation and design of experiments
… and rear, low and high speed bump and rebound damper settings, as well as the front and rear tire stiffness. An initial fractional factorial DOE was generated to study the mean pitch response as a result of selected damper and tire stiffness settings. The results of the DOE were then used to …
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Experimental and analytical study of variable fluid damper and stiffness device
A prototype variable fluid damper and stiffness device is evaluated in this study. This damper is capable of providing continuous variation with different levels of system damping and stiffness. The damping and stiffness can be varied independent of each other or simultaneously. The following …
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Reduction of excess fan power due to economizer damper pressure losses
… investigated in this thesis, consisted of three dampers, an outdoor air, a recirculation, and a discharge damper. The purpose of an economizer is to control the ratio of the outdoor air flow rate to the recirculation air flow rate. The dampers were opposed blade type and had equal sizes. They …
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Development of a CubeSat Instrument for Microgravity Particle Damper Performance Analysis
… measurements of highly nonlinear particle damper dynamics. </p>
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A design concept of a damper shield of a superconducting alternator.
Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Thesis. 1974. M.S.
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A Novel Magnetorheological Fluid Damper for a Small Spacecraft with Flexible Appendages
… thesis presents the possible design of a new damper for the small, flexible spacecraft model. The design takes advantage of a smart material known as a magnetorheological (MR) fluid that was initially created in the 1940s, but has been subject to renewed interest over the past 30 years. A …
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Input identification, footbridge control and non-linear identification of a MR damper
… and the use of a semi-active tuned mass damper. In this respect, the work appears threefold since the first and third part regard identification of a realistic model for the damping device and semi-active control of the magneto-rheological damper. In this respect, input identification …
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Performance evaluation of innovative toggle brace damper for flexible structure seismic upgrade
Amplifying the motion of viscous dampers has been recognized as an effective solution to mitigate structural response to wind and seismic excitation. Motion amplification devices are designed to amplify a small interstory drift to intensify the stroke of the dampers attached. The efficiency of such …
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Artificial Neural Networks based Modeling and Analysis of Semi-Active Damper System
… conditions. The damping coefficient of the damper plays a crucial role in determining the overall frequency response of the suspension system. Considerable research has been carried out on semi active damper systems as the damping coefficient can be varied without the system requiring …
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Theoretical and experimental study on cable vibration reduction with a TMD-MR damper
… to using the existing Magnetorheological (MR) damper, the current study proposes a new type of damper, called the Tuned Mass Damper-Magnetorheological (TMD-MR) damper. Theoretical and experimental investigations for the damper performance on the cable vibration reduction are conducted, which …
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Effects of a tuned mass damper on wind-induced motions in tall buildings
… to wind loads, one of which is the Tuned Mass Damper system. This system, which consists of an auxiliary mass added to a structure, significantly reduces motions in high-rise buildings. However, the theory is often based on a harmonic excitation of a building, which is not necessarily the exact …
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