استخدام مخمد مغناطيسي ريولوجي (MR) لتحسين استجابة نظام تعليق السيارة

Using Magneto-Rheological (MR) Damper for Enhancement Vehicle Suspension System Response

Abstract

Suspension systems in vehicles are considered essential parts in the development of the automobile industry by increasing ride comfort and reliability in driving. In this thesis, the semi-active suspension system was studied and simulated using MR damper technology with the quarter-car model in simulating the system’s response through the Matlab / Simulink environment. Magnetorheological (MR) dampers are adaptive devices whose properties can be adjusted through the application of a controlled voltage signal. A semi-active suspension system incorporating MR dampers combines the advantages of both active and passive suspensions. For this reason, there has been a continuous effort to develop control algorithms for MR-damped vehicle suspension systems to meet the requirements of the automotive industry. This thesis aims to investigate parametric techniques for identifying the nonlinear dynamics of an MR damper and Implement these techniques in the investigation of MR damper control of a vehicle suspension system that makes minimal use of sensors, thereby reducing the implementation cost and increasing system reliability. Four modern parametric models were selected, and a comparison was made in simulating the behaviour of the MR damper. The MR damper’s non-linear behaviour is considered an essential obstacle in conducting an accurate simulation with the control systems that were used, namely (Skyhook with SFM). The modified Bouc-wen model is considered one of the most accurate models in the numerical simulation and is considered a stable model in explaining the hysteretic behaviour of the MR damper. The results showed a significant improvement in damping the vibrations resulting from the road profile by 50% and 39%, Approximately of the vertical displacement and the vertical acceleration compared to the passive suspension.