Analysis on passive vehicle suspension system

Chin , Fen Ying (2014) Analysis on passive vehicle suspension system. Project Report. UTeM. (Submitted)

Text ANALYSIS ON PASSIVE VEHICLE SUSPENSION SYSTEM 24pages.pdf Download (582kB)

Abstract

Vehicle suspension system plays an important role in automobile industry in order to guarantee good ride quality of vehicle. Basically, traditional suspension system which is passive suspension system consists of springs, shock absorbers and linkages that connect a vehicle body to its wheels. However, passive suspension system is an open loop system which does not contain any controllers to control the performance of the vehicle suspension system when passing through bumpy on the road. In this report, construction of an experiment setup to represent passive vehicle suspension system for quarter car model is considered. Experimental setup for passive suspension system is important because proper modeling of vehicle suspension system could lead to good controller design and hence improve the performance of the vehicle suspension system. This report primarily focuses on the two-degree-of freedom quarter-car model to represent passive suspension system. Semi-active and active suspension system will not be covered in this project A number of experiments have been carried out using the experiment setup in order to identify the characteristic of this experimental setup. Experiments with different vehicle body mass, different period for one pulse and different pulse width of input pressure of the road excitation have been conducted. The experiments results are evaluated based on the vehicle body displacement and tire displacement of the experimental setup. However, experiments give different results when three parameters are varied. Experiment results show that the pulse width of the input pressure is directly affected the characteristic of this passive suspension system experimental setup. Lastly, simple simulation has been done in order to compare the simulation and experiments results. The amplitude and shape of the simulation and experimental results are evaluated in this report.

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