Multi-objective optimization in the vibration characteristics of a hydraulic steering system using a conservative and feasible response surface method

ABSTRACT

This article addresses the approximate multi-objective optimum design of an automotive hydraulic steering system based on a multi-body dynamics analysis. The design problem of a hydraulic steering system was formulated to determine the design dimensions of a steering mechanism that is able to estimate the multi-objective Pareto-optimal solutions of weight and vibration frequencies that are subject to the dynamic response constraints of the main steering components. The multi-objective Pareto-optimal solutions were calculated using the non-dominated sorting genetic algorithm-II (NSGA-II) based on various approximate models, and reviewed in terms of exploration performance and constraint feasibility. The multi-objective Pareto-optimal solution characteristics according to the approximate model were reviewed to identify a proper approximate model for the engineering design of a hydraulic steering system. The results of the Pareto solution from the proposed optimization methods could improve the vibration performance as well as the weight reduction of hydraulic steering systems.

KEYWORDS:

• Automotive hydraulic steering system
• multi-body dynamics analysis
• multi-objective Pareto-optimal solutions
• approximate models
• conservative and feasible response surface method

Acknowledgements

This work is supported by the Ministry of Trade, Industry & ENERGY(MOTIE) through the project for fostering the convergence of industry and academia, and the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Science, ICT & Future Planning.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Research Foundation of Korea [grant numbers 2012R1A1A1002897, 2017R1A2B4009606].