Design optimization of multi-link suspension system for total vehicle handling and stability

摘要

This paper discusses the design problem of vehicles using a multilink suspension systems with the aim of totally optimizing vehicle handling and stability. ^Since this problem includes many evaluation items, and a multilink suspension system has interconnected behavior, the optimization is complicated. ^An efficient and computable model is indispensable for compromising the total optimization. ^This paper investigates a hierarchical structure of objectives, introduces appropriate simulation models for the respective items, and formulates a mathematical optimization model based on them. ^We apply a Genetic-Algorithm (GA)-based optimization method to this problem. ^The GA is based on Simple GA and introduces several extensions, such as a fitness function for constrained multiobjective optimization problems, similarity-based selection, and direct crossover within side constraints. ^Optimization calculations show the validity of the optimization model and the optimization algorithm as mathematical-computation-based design methods. ^(Author)