Journal of Advanced Sciences and Engineering Technologies (2019) 2(1) 1- 20

PID Controller of a Car with Quarter Body Active Suspension System

Mohammed H. Mohammed

Adel M Bash
Department of Mechanical Engineering/Tikrit University/Iraq


The physical isolation of the cause and effect of the car model from the other environment (i.e car body from the car tires) called the suspension system. The goal of any system suspension is to increase    the    ride comfort, road    handling    and stability of closed loop system. The   suspension   design   must   be compensate the effect of conflicting criteria of road holding, both passenger comfort and load carrying. In this research, active suspension system has been introduced. A quarter-car two degree-of-freedom (2DOF) system is designed and constructed to simulate the actions of an active quarter car suspension system. White noise input is introduced to a given system to expressed unpaved road and both step input and sine wave input are studied as well. The control strategy is based on two degree of freedom  PID controller. (MATLAB/ Simulink) is used to verify the proposed algorithm. The comparison between the passive and active suspension and the results obtained from a range of road input simulations in the proposed algorithm shows the effectiveness of the proposed algorithm and best results are obtained.©

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KeywordsSuspension, Quarter car model, Active suspension, Passive suspension, PID controller.


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