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Brock's approaching zero method improved as approaching fixed point frequency to solve optimum damping ratio of dynamic vibration absorber in machine tools and experimental confirmation. [PDF]

PLoS One
Tian H, Liang X, Du X.
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Semi-active control of friction dampers

Proceedings of 1995 34th IEEE Conference on Decision and Control, 2002
Quite a few papers have appeared dealing with how to minimize the effects of friction in machines. A recurring theme has been that friction is a dynamic phenomenon. As such, much attention has been paid to obtaining the appropriate friction model structure, and to the identification of model parameters.
P. Dupont, A. Stokes
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Investigation of the semi-active electromagnetic damper

Smart Structures and Systems, 2014
In this paper, the electromagnetic damper (EMD), which is composed of a permanent-magnet rotary DC motor, a ball screw and a nut, is considered to be analyzed as a semi-active damper. The main objective pursued in the paper is to study the two degrees of freedom (DOF) model of the semi-active electromagnetic suspension system (SAEMSS) performance and ...
Morteza Montazeri-Gh, Omid Kavianipour
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Effects of control techniques and damper constraint on the performance of a semi-active magnetorheological damper

International Journal of Vehicle Autonomous Systems, 2005
Semi-active dampers change their damping force in real time by simply changing the damping coefficient according to a control policy. In this study, a number of semi-active control algorithms namely modified skyhook, modified groundhook and modified ...
Khisbullah Hudha
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Assessment of semi-active friction dampers

Mechanical Systems and Signal Processing, 2017
Abstract The use of friction dampers has been widely proposed for a variety of mechanical systems for which applying viscoelastic materials, fluid based dampers or other viscous dampers is impossible. An important example is the application of friction dampers in aircraft engines to reduce the blades’ vibration amplitudes.
dos Santos, Marcelo Braga, Coelho, Humberto Tronconi, Lepore Neto, Francisco Paulo, Mahfoud, Jarir   +3 more
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Force Control of a Semi-Active Damper

Vehicle System Dynamics, 1995
SUMMARY Two strategies are investigated for controlling a semi-active damper to track a prescribed force demand signal: (i) ‘open loop’ control, using a model of the damping force versus velocity characteristics; and (ii) force feedback (closed loop) control.
F.H. BESINGER, D. CEBON, D.J. COLE
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Vibration Attenuation by Semi-active Dampers

2013
This contribution deals with the optimization of a tractor’s cab’s vertical acceleration. The mathematical model of the simplified system is derived. The acceleration of the chassis is considered as the actuating variable. In the optimization the acceleration of the tractor’s cab is minimized under the constraint of a maximum displacement between the ...
K. Feuerhuber, Sven-Olaf Lindert, Kurt Schlacher   +2 more
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Semi-active Spiral Flow Channel Magnetorheological Damper

2014 IEEE 17th International Conference on Computational Science and Engineering, 2014
The Magneto Rheological Fluid, MRF is a reversible material, this material would be an idea semi-active control device due to its reversible and easy-control properties. In this research, Solid Works 3D drawing software is used as the structural design and Max Well magnetic field analysis software is used to simulate the lines of magnetic force toward ...
Jinglong Tong, Kuangyuh Huang
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Semi-active control of vehicle vibration with mr-dampers

42nd IEEE International Conference on Decision and Control (IEEE Cat. No.03CH37475), 2004
A semi-active force tracking PI controller is formulated and analyzed for a magnetorheological (MR) fluid-based damper in conjunction with a quarter-vehicle model. Two different models of the MR-damper are integrated into the closed-loop system model, which include: a model based upon the mean force-velocity behavior; and a model synthesis comprising ...
Enrong Wang, Xiao Qing Ma, Subhash Rakheja, Chun-Yi Su   +3 more
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