Magnetorheological damper—an experimental study

Abstract

,luc.dugard}@gipsa-lab.grenoble-inp.fr A Magneto-Rheological (MR) damper is evaluated under exhaustive experimental scenarios, generating a complete database. The obtained database includes classical tests and new proposals emphasizing the frequency contents. It also includes the impact of the electric current fluctuations. The variety of the performed experiments allows to study the MR damper force dynamics. A brief description of the damper behavior and a categorization of experiments based on driving conditions and target applications on vehicle dynamics is discussed. The identification of two MR damper models as well as their cross validation emphasize the importance of the persistence of experimental inputs and the combinations of rod displacement and electric current sequences for better modeling. New findings in Design of Experiments for model identification are presented. 1. Mass production: Mechanical simplicity given that it is 1. The DoE for identification of MR damper models have not precisely been focused on a specific application.

Control Tolerante a Fallas en una Suspensión Automotriz Semi-Activa

“…Los parámetros concentrados del cuarto de vehículo considerado son: m s = 470 Kg, m us = 110 Kg, k s = 86, 378 N/m y k t = 270, 000 N/m. Utilizando la metodología de caracterización de amortiguadores MR propuesta en (Lozoya-Santos et al, 2012), se obtuvó un modelo experimental de la fuerza de amortiguamiento de acuerdo a (2) con F δ = 0, cuyos parámetros obtenidos son: f c = 600.95 N/A, a 1 = 37.85 (N · s)/m, a 2 = 22.15 N/m, b 1 = 2, 830.86 (N · s)/m y b 2 = −7, 897.21 N/m. La Figura 5 muestra un diagrama de bloques del sistema de control tolerante a fallas evaluado en Matlab/Simulink TM usando CarSim TM como software-in-the-loop.…”

Off-Road Motorbike Performance Analysis Using a Rear Semiactive EH Suspension

“…Equation 8is the sum of these two forces. For detailed information about the EH damper, see de-J Lozoya-Santos et al [19]. Figure 4 shows the simulation of the EH damper using (8) and the passive damper model.…”

“…A dynamic filter is added to the model (8) in order to take into account the transient behavior of the damper, Figure 4. The time constant for the first-order filter is 25 ms with no gain according to experimental results for a semiactive damper [19].…”

Comparison of Heuristic Controllers for an Automotive Semi-Active Suspension

“…The vehicle model is used as SiL in the Matlab/Simulink TM platform. The experimental MR damper model, used in each corner, has been characterized according to the methodology described in [Lozoya-Santos et al, 2012] by using the parametric model proposed in [Guo et al, 2006]:…”