자동차 후륜 현가계 트레일링 암의 부쉬 파라미터 최적설계

In this study, bush parameter optimization of trailing arm bush in a vehicle rear suspension was carried out. In order to improve ride and handle performance, a design problem was formulated considering 7 constraints and 2 objective functions related to vehicle ride and handling performance. We used a process integration and design optimization (PIDO) tool, PIAnO, to automate analysis procedures and perform a design optimization. Screening of design variable was also performed to check significant design variables. Progressive quadratic response surface method (PQRSM), one of the design optimization techniques equipped in PIAnO, was used to find the optimal solution. As an optimization result, we got an optimal solution which increase lateral force steer off-center by 43.0% and decrease brake compliance at wheel center by 8.1%, respectively.