Optimal Speed Control Humps Design Based on Driver Comfort

Authors

  • H. Gheibollahi Vehicle Dynamical System Research Lab, School of Automotive Engineering, Iran University of Science and Technology, Tehran, Iran. P.O.B. 16846-13114 Tehran, Iran
  • M. Masih-Tehrani Vehicle Dynamical System Research Lab, School of Automotive Engineering, Iran University of Science and Technology, Tehran, Iran. P.O.B. 16846-13114 Tehran, Iran https://orcid.org/0000-0002-2936-7565

DOI:

https://doi.org/10.15282/ijame.18.3.2021.08.0685

Keywords:

Biodynamic model; Driver comfort; Genetic algorithm; Speed control humps (SCHs); Vehicle suspension

Abstract

The purpose of this study is to optimise the different speed control humps by considering the vertical and horizontal acceleration of the driver’s head. In previous researches, the main focus was only on vertical acceleration, but in this study, horizontal acceleration of the head is also considered. Here, the root mean square (RMS) of acceleration of head is considered as a measure of occupant comfort. The modelling is performed by a non-linear half-car suspension system (4-DOF) with a linear model of a driver (10-DOF) and a seat. The hamps under study are circular, sinusoidal, half-sinusoidal, and trapezoidal. Finally, by analysing the results, the optimal design of each type of hump is performed. The objective function used is a combination of horizontal and vertical acceleration which is performed using MATLAB genetic algorithm. The results show a significant reduction in horizontal and vertical acceleration at all speeds. From this modelling, it is possible to extract a suitable range for passing the speed of cars over different types of humps. In this study, it is shown that the acceleration values for the circular and half-sinusoidal humps at all speeds are quite close to each other.

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Published

2021-09-19

How to Cite

Gheibollahi, H., & Masih-Tehrani, M. (2021). Optimal Speed Control Humps Design Based on Driver Comfort. International Journal of Automotive and Mechanical Engineering, 18(3), 8941–8958. https://doi.org/10.15282/ijame.18.3.2021.08.0685

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Section

Articles