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Semi-active control of friction dampers
Proceedings of 1995 34th IEEE Conference on Decision and Control, 2002Quite 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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Assessment of semi-active friction dampers
Mechanical Systems and Signal Processing, 2017Abstract 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 +3 more
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Vibration Attenuation by Semi-active Dampers
2013This 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 +2 more
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Investigation of the semi-active electromagnetic damper
Smart Structures and Systems, 2014In 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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Force Control of a Semi-Active Damper
Vehicle System Dynamics, 1995SUMMARY 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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Semi-active Spiral Flow Channel Magnetorheological Damper
2014 IEEE 17th International Conference on Computational Science and Engineering, 2014The 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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Hysteresis Modeling of Semi-Active Magnetorheological Helicopter Dampers
Journal of Intelligent Material Systems and Structures, 1999MR dampers in soft-inplane rotors such as hingeless and bearingless rotors have potential benefits including semi-active control of aeromechanical instabilities, such as ground and air resonance. An experimental performance characterization of hybrid elastomeric/MR dampers for the 1/6th scale Comanche wind tunnel model rotor is presented. These dampers
V. MADHAVAN, G.M. KAMATH, N.M. WERELEY
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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), 2004A 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 +3 more
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Assessment of semi-active friction dampers in auxiliary mass dampers’ suspension
Engineering Structures, 2019Abstract Because of the efficiency of semi-active friction dampers to dissipate mechanical energy, their use have been extensively proposed for a variety of mechanical systems to reduce vibration amplitudes. A considerably simple model for a semi-active friction damper can be obtained with the use of an elastic element coupled to a vibratory system ...
Marcelo Braga dos Santos +1 more
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Pwm control of semi-active dampers
2022The positioning and tracking control problems of a Stewart hexapod platform are investigated in the present paper by the use of six optimal semi-active pulse-width modulated brakes. The control in PWM (Pulse Width Modulation) of the damping coefficients of the actuators constitutes a novelty.
S. Mesbahi +5 more
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