Page 58 - 2023-Vol19-Issue2

Received: 5 February 2023 | Revised: 3 April 2023 | Accepted: 8 April 2023

DOI: 10.37917/ijeee.19.2.7 Vol. 19 | Issue 2 | December 2023

Open Access

Iraqi Journal for Electrical and Electronic Engineering

Original Article

Improving the Dynamic Response of Half-Car Model

using Modified PID Controller

Mustafa Mohammed Matrood *1, Ameen Ahmed Nassar 2
1Department of Mechanical Engineering, College of Engineering, University of Basrah, Basra, Iraq

2Basra Oil Company, Seawater Department, Basra, Iraq

Correspondance
*Mustafa Mohammed Matrood
Basra Oil Company, Basra, Iraq,
Email: mtdmst83@gmail.com

Abstract
This paper focuses on the vibration suppression of a half-car model by using a modified PID controller. Mostly, car
vibrations could result from some road disturbances, such as bumps or potholes transmitted to a car body. The proposed
controller consists of three main components as in the case of the conventional PID controller which are (Proportional,
Integral, and Derivative) but the difference is in the positions of these components in the control loop system. Initially, a
linear half-car suspension system is modeled in two forms passive and active, the activation process occurred using a
controlled hydraulic actuator. Thereafter, the two systems have been simulated using MATLAB/Simulink software in
order to demonstrate the dynamic response. A comparison between conventional and modified PID controllers has been
carried out. The resulting dynamic response of the half-car model obtained from the simulation process was improved
when using a modified PID controller compared with the conventional PID controller. Moreover, the efficiency and
performance of the half-car model suspension have been significantly enhanced by using the proposed controller. Thus,
achieving high vehicle stability and ride comfort.

Keywords
Displacement, Dynamic Response, Half-Car Model, Modified PID Controller, Oscillation.

I. INTRODUCTION means to significantly dampen the vibrations and oscillations.
A hydraulic actuator is one of the most suitable means that can
Vehicle can be subjected to a shock as a result of the tire’s be used in parallel with the suspension system to generate the
interference with irregularities of the road surface like cross- needed force to damp the road disturbances. These actuators
ing over road bumps. These shocks can be transmitted to the can be activated and controlled by using different methods in
vehicle body in the form of vibrations. The suspension system order to achieve high vehicle stability while driving. Many
i.e., spring and damper, which is located between the car body researchers have attempted to improve the dynamic response
and the wheel attempt to absorb encountered shocks. This pro- of the vehicles by controlling the developed force from the
cess results in damping car body vibrations. Springs have the hydraulic actuator in order to achieve the principle of vehi-
property of continuing to oscillate for period of time while the cle stability. A list of researches contributes in this field of
dampers dissipate the received energy of oscillations. Other study. P. S. Kumar et al. [2] proposed a hybrid intelligent
basic tasks of the suspension system fall under its capability control technique based on combination of neural network
to isolate the car body from road disturbances in order to and fuzzy for hydraulic actuated active half car suspension
provide ride comfort, good handling and support the vehicle system. Faried Hasbullah and Waleed F. Faris [3] proposed
static weight [1]. Suspension system’s absorbing and damping an active disturbance rejection control with input decoupling
capabilities sometimes may be insufficient and may take a transformation for a half car model. Yan-Jun Liang et al. [4]
while to halt the oscillations. This may require adding other

This is an open-access article under the terms of the Creative Commons Attribution License,
which permits use, distribution, and reproduction in any medium, provided the original work is properly cited.
©2023 The Authors.
Published by Iraqi Journal for Electrical and Electronic Engineering | College of Engineering, University of Basrah.

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