SÇ

S. Çağlar Başlamışlı

Hacettepe University

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Co-Authors

Fakher Chaari

University of Sfax

Maroua Haddar

University of Sfax

Mohamed Haddar

University of Sfax

Riadh Chaari

University of Sfax

Dorra Ben Hassen

University of Sfax

Selim Solmaz

Virtual Vehicle (Austria)

Mohamed Haddar

University of Sfax

Mohamed Slim Abbès

University of Sfax

Mariem Miladi

National Engineering School of Tunis

İE

İ. Emre Köse

Boğaziçi University

Cooperative Institutions

Hacettepe University

University of Sfax

National Engineering School of Tunis

Laboratoire de Mécanique, Modélisation & Procédés Propres

Middle East Technical University

Boğaziçi University

Tunis El Manar University

Gediz University

University of Gabès

Wrocław University of Science and Technology

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Mobility improvement of wheeled military vehicles using preview controlled active ride height system

Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering (2022)

Alperen Kale S. Çağlar Başlamışlı

This study aims to provide a method to increase the mobility capabilities of wheeled military vehicles such as off-road trench and obstacle crossing by designing a preview control strategy based on model predictive control (MPC). The study is divided into three parts. The first part aims to create a vehicle dynamics model with active suspension and a co-simulation environment involving MATLAB ® and MSC ADAMS/Car™. In the second part, the level of achievable improvement in the vehicle’s operational abilities is investigated. Here, it is aimed to develop a controller and optimize vehicle ride height and attitude for improving mobility operations. Measured road data is used to improve the controller performance and create an obstacle crossing algorithm. Finally, a comparison of simulation results for different land operation scenarios is given for both uncontrolled and controlled systems based on which improvement levels are determined.

Suspension

10.1177/09544070221075426

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Citations (1)

Gain-scheduled integrated active steering and differential control for vehicle handling improvement

Vehicle System Dynamics (2008)

S. Çağlar Başlamışlı İ. Emre Köse Günay Anlaş

This paper presents a gain-scheduled active steering control and active differential design method to preserve vehicle stability in extreme handling situations. A new formulation of the bicycle model in which tyre slip angles, longitudinal slips and vehicle forward speed appear as varying vehicle parameters is introduced. Such a model happens to be useful in the design of vehicle dynamics controllers scheduled by vehicle parameters: after having expressed the parametric bicycle model in the parametric descriptor form, gain-scheduled active steering and differential controllers are designed to improve vehicle handling at 'large' driver-commanded steering angles. Simulations reveal the efficiency of the selected modelling and controller design methodology in enhancing vehicle handling capacity during cornering on roads with varying adhesion coefficient and under variable speed operation.

Automobile handling

Electronic differential

Active Steering

Active safety

10.1080/00423110801927100

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Citations (57)

MIMO intelligent-PID controller design for half car system based on model free control technique

Journal of Theoretical and Applied Mechanics/Mechanika Teoretyczna i Stosowana (2020)

Fathi Djemal Maroua Haddar S. Çağlar Başlamışlı Riadh Chaari Fakher Chaari

1. Demir O., Keskin I., Cetin S., 2012,Modeling and control of a nonlinear half-vehicle suspension system: a hybrid fuzzy logic approach, Nonlinear Dynamics, 67, 3, 2139-2151. CrossRef Google Scholar

10.15632/jtam-pl/127428

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Citations (1)

Lateral Stability Control Based on Active Motor Torque Control for Electric and Hybrid Vehicles

International Journal of Simulation Systems Science & Technology (2020)

Işılay Yogurtcu Selim Solmaz S. Çağlar Başlamışlı

Torque motor

Electronic stability control

10.5013/ijssst.a.17.33.06

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Citations (0)

Online Identification of Road Profile Variation Using a Constant Piecewise Function

Lecture notes in mechanical engineering (2017)

Maroua Haddar S. Çağlar Başlamışlı Fakher Chaari Mohamed Haddar

Constant (computer programming)

Variation (astronomy)

Constant function

10.1007/978-3-319-66697-6_50

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Citations (2)

Improving the ride comfort of full car model with a decoupling intelligent model free controller

Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering (2022)

Maroua Haddar Marwa Bouslema S. Çağlar Başlamışlı Fakher Chaari Mohamed Haddar

A new technique of active control is presented for enhancing the dynamic responses of full car systems with bias to ride comfort performance. A seven degrees of freedom full car model is used, and its performance is evaluated on a bump road and random road. The proposed scheme is a combination between traditional controller design methods with an algebraic estimator of perturbations that will be eliminated online. From the inputs and the outputs signals, the unmodeled phenomenon can be estimated and be subtracted for ensuring the proper functioning of the system. The precise mathematical model of the system is not required for the implementation of the control scheme and is replaced by ultra-local models. Furthermore, the effectiveness of the algebraic estimator of road profile is introduced for applying the excitation sources of the reference generator. The road profiles in front of the vehicle are estimated separately from the rear road profiles. The ride comfort is improved progressively with the novel controller configuration by 83% from the passive case. Further, pitching and rolling fluctuations are reduced by 80% and 85% respectively. The numerical simulations illustrate the effectiveness and the robustness against vehicle body mass deviation and nonlinear actuator saturation of the proposed control method compared to passive and Active Disturbance Rejection Controller based on Input Decoupling Transformation.

Robustness

Decoupling (probability)

10.1177/09544070221121863

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Citations (6)

Road profile estimation using the dynamic responses of the full vehicle model

Applied Acoustics (2017)

Dorra Ben Hassen Mariem Miladi Mohamed Slim Abbes S. Çağlar Başlamışlı Fakher Chaari

Robustness

10.1016/j.apacoust.2017.12.007

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Citations (41)

THE EFFECT OF DIFFERENT GEAR RATIO SELECTION ALGORITHMS ON THE EFFICIENCY OF CONVENTIONAL AND PARALLEL HYBRID DRIVETRAINS

Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering (2017)

Ali Amini S. Çağlar Başlamışlı Bayramcan İnce Mertcan Koçak

Road vehicles using electric power sources have become increasingly popular in the last decade. Meanwhile, battery technology is still not mature enough to meet expected vehicle range; thus the transition from ICE vehicle to fully electric vehicle is not imminent. Therefore the concept of hybrid drivetrain technology was introduced. The hybrid powertrain configuration includes at least two different energy converters together with an energy storage medium. In this article, different gear shifting algorithms were introduced to increase ICE efficiency in conventional vehicle. Besides, a parallel hybrid configuration was also introduced to enhance drivetrain efficiency. The Equivalent Energy Minimization Method (ECMS) and Dynamic Programming (DP) algorithms were selected as online and offline implementable optimal control methods for hybrid power sharing management. Totally six different case studies were planned to compare the efficiency of each configuration. Finally, the effect of the gear ratio selection and power split algorithms were compared on conventional and parallel hybrid drivetrains regarding overall efficiency.

Drivetrain

Powertrain

Hybrid vehicle

Minification

10.18038/aubtda.340367

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Citations (0)

Road profile identification with an algebraic estimator

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science (2018)

Maroua Haddar S. Çağlar Başlamışlı Riadh Chaari Fakher Chaari Mohamed Haddar

In order to isolate the propagation of unwanted vibrations to passengers and improve vehicle maneuverability, it is common practice to predict road profile roughness in the scope of active suspension design. An algebraic estimator designed for the estimation of the road profile excitation has been investigated in this study based on vehicle dynamics responses. An approximation of road profile excitation by a piecewise constant function has been proposed using the operational calculus method and the differential algebraic theory. The proposed technique allows for the usage of cheap instrumentation with a small number of sensors and employs a straightforward calibration process. Accurate approximation of the road profile was obtained from the measurement of sprung mass and unsprung mass vertical displacements. The performance and robustness of the proposed algebraic predictor is compared with an augmented Kalman estimator. Numerical results are provided to analyze the effectiveness and the limitations of the proposed algorithm for road profile reconstruction. Furthermore, a comparison with real profile was studied.

Robustness

10.1177/0954406218767470

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Citations (17)

Application of the Operational Modal Analysis Using the Independent Component Analysis for a Quarter Car Vehicle Model

Applied condition monitoring (2016)

Dorra Ben Hassen Mariem Miladi Mohamed Slim Abbès S. Çağlar Başlamışlı Fakher Chaari

Component (thermodynamics)

Operational Modal Analysis

10.1007/978-3-319-41459-1_12

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Citations (10)