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Vibration control enhancement in a full vehicle dynamic model by optimization of the controller’s gain parameters

Leonardo Valero Pereira (Departamento de Engenharia Mecânica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil)
Walter Jesus Paucar Casas (Departamento de Engenharia Mecânica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil)
Herbert Martins Gomes (Departamento de Engenharia Mecânica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil)
Luis Roberto Centeno Drehmer (Departamento de Engenharia Mecânica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil)
Emanuel Moutinho Cesconeto (Departamento de Engenharia Mecânica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil)

Engineering Computations

ISSN: 0264-4401

Article publication date: 26 February 2024

Issue publication date: 4 March 2024

71

Abstract

Purpose

In this paper, improvements in reducing transmitted accelerations in a full vehicle are obtained by optimizing the gain parameters of an active control in a roughness road profile.

Design/methodology/approach

For a classically designed linear quadratic regulator (LQR) control, the vibration attenuation performance will depend on weighting matrices Q and R. A methodology is proposed in this work to determine the optimal elements of these matrices by using a genetic algorithm method to get enhanced controller performance. The active control is implemented in an eight degrees of freedom (8-DOF) vehicle suspension model, subjected to a standard ISO road profile. The control performance is compared against a controlled system with few Q and R parameters, an active system without optimized gain matrices, and an optimized passive system.

Findings

The control with 12 optimized parameters for Q and R provided the best vibration attenuation, reducing significantly the Root Mean Square (RMS) accelerations at the driver’s seat and car body.

Research limitations/implications

The research has positive implications in a wide class of active control systems, especially those based on a LQR, which was verified by the multibody dynamic systems tested in the paper.

Practical implications

Better active control gains can be devised to improve performance in vibration attenuation.

Originality/value

The main contribution proposed in this work is the improvement of the Q and R parameters simultaneously, in a full 8-DOF vehicle model, which minimizes the driver’s seat acceleration and, at the same time, guarantees vehicle safety.

Keywords

Acknowledgements

The authors acknowledge the financial support of the Brazilian National Council for Scientific and Technological Development (CNPq) and CAPES (Finance Code 001). Herbert M. Gomes is thankful for the financial support of CNPq (No. 304626–2021-0).

Since submission of this article, the following author have updated their affiliations: Luis Roberto Centeno Drehmer is at the Federal University of Santa Maria, Cachoeira do Sul, Brazil.

Citation

Pereira, L.V., Paucar Casas, W.J., Gomes, H.M., Drehmer, L.R.C. and Cesconeto, E.M. (2024), "Vibration control enhancement in a full vehicle dynamic model by optimization of the controller’s gain parameters", Engineering Computations, Vol. 41 No. 1, pp. 259-286. https://doi.org/10.1108/EC-04-2023-0178

Publisher

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Emerald Publishing Limited

Copyright © 2024, Emerald Publishing Limited

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