Analysis of MR Damper for Quarter and Half Car Suspension Systems of a Roadway Vehicle
TL;DR: In this article, the suspension system of a car using magnetorheological dampers is analyzed for 2DOF quarter car and 4DOF half car models and then compared with corresponding suspension system using passive damper for ride comfort and handling.
Abstract: Magnetorheological (MR) dampers are evolving as one of the most promising devices for semi-active vibration control of various dynamic systems. In this paper, the suspension system of a car using MR damper is analysed for 2DOF quarter car and 4DOF half car models and then compared with corresponding suspension system using passive damper for ride comfort and handling. Magnetorheological damper is fabricated using a MR fluid of Carbonyl iron powder and Silicone oil added with additive. Experiments are conducted to establish the behaviour of the MR damper and are used to validate Spencer model for MR damper. Further, using the validated Spencer model of MR damper, the quarter car and half car models of Vehicle Suspension system are simulated by implementing a semi-active suspension system for analysing the resulting displacement and acceleration in the car body. The ride comfort and vehicle handling performance of each specific vehicle model with passive suspension system are compared with corresponding semi-active suspension system. The simulation and analysis are carried out using MATLAB/SIMULINK.
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09 Jun 2020
TL;DR: In this article, the authors analyzed the motion dynamics of a generic articulated vehicle and developed a rigid multibody model to evaluate the obtainable electric energy harvesting part of semi-trailer wheels' rotational kinetic energy.
Abstract: A semi-trailer is a vehicle without a power unit, whose purpose is to carry goods and materials; semi-trailers differ one from another based on the type and weight of the transported goods. In this work, we analyzed the motion dynamics of a generic articulated vehicle and developed a rigid multibody model. First, we analyzed mathematical models from literature to understand the vehicle’s dynamic; secondly, we created a 3D model, based on theoretical background and typical constructive solutions; finally, we launched multibody simulations in a multi-domain environment SimScape. The results were used to evaluate the obtainable electric energy harvesting part of semi-trailer wheels’ rotational kinetic energy; finally, the electric power would be stored into a battery. Having an energy recovery system mounted directly on the semi-trailer would result in great benefits both for the costs and for the environmental impact: since every utility needs the engine to be always active, with an electric source we could power every utility of the semi-trailer without using the engine so that we could avoid the unnecessarily introduction of pollutants into the atmosphere.
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TL;DR: In this paper , a Magnetorheological (MR) damper is developed using MR fluid consisting of carbonyl iron powder and silicone oil added with additive, the characteristics of this damper are established by conducting experiments, further these results are used to identify the parameters of Spencer model for MR damper using Matlab / Simulink.
Abstract: : Suspension systems play vital role in vehicle dynamics, particularly for improving the ride performance characteristics like, ride comfort, vehicle handling and vehicle compactness. The limited scope of the passive viscous dampers in achieving the best results for suspension has paved way for active and semi-active vibration controls. Magnetorheological (MR) dampers as semi-active control devices are one such a feasible solution for improving vehicular suspension. As part of this study, a MR damper is developed using MR fluid consisting of carbonyl iron powder and silicone oil added with additive. The characteristics of this damper is established by conducting experiments, further these results are used to identify the parameters of Spencer model for MR damper using Matlab / Simulink.
TL;DR: In this paper , the authors used magnetorheological dampers as semi-active control devices for secondary suspension in a railway wagon for achieving better ride performance parameters and compared the ride comfort parameters of the wagon with MR dampers against conventional passive viscous dampers.
Abstract: The rail irregularities and wheel-rail interactions in a train running at high speeds may result in large-amplitude vibration in the train's car body and affect passengers by reducing ride comfort. The train suspension systems have a vital role in reducing the vibration and improving ride comfort to an acceptable level. The existing passive viscous dampers have limited scope of achieving this objective. In this paper Magnetorheological (MR) dampers as semi-active control devices for secondary suspension in a railway wagon are used for achieving better ride performance parameters. Compared the ride comfort parameters of the wagon with MR dampers against the conventional passive viscous dampers. The sprung mass acceleration, displacement and suspension travel are assessed for three different control strategies, skyhook, ground hook and hybrid. Matlab/Simulink software is used for simulation of the wagon suspension system.