Multi-objective optimisation design of passive suspension parameters based on competition-cooperation game model

摘要

The primary function of a vehicle suspension system is to isolate the road excitations experienced by tires. In this paper, the competition-cooperation game method is applied to optimise a linear vehicle suspension model with eight degrees of freedom. Considering road surface damage and ride comfort, using the stiffness and damping of seat and suspension systems as design variables, and using the seat acceleration root-mean-square, tire's relative dynamic load and suspension's maxim dynamic stroke as objective functions, a competitive and cooperative game design model is established, and the optimal methods are presented. By calculating the influence of the design variables on the objective functions and fuzzy clustering, the design variables are divided into different strategic spaces owned by each player. Based on the competitive and cooperative game model, each game player uses its payoff as a mono-objective to optimise its own strategic spaces and obtains the best strategy to address the others. All the best strategies are combined into a game strategy set. Compared with fuzzy optimisation and initial design, the results show that ride comfort, road surface damage, and suspension dynamic travel are improved.