Robustness optimization of the position of an anti-roll bar link to avoid the toggling of a rear axle stabilizer

摘要

The task is to find a position for the upper and lower attachment points of the pendulum-linked anti-roll bar link (ARB-link) where the toggling tendency of the rear axle stabilizer can be avoided. For this purpose opposite wheel travel analyses are performed with an ADAMS/Car rear axle model with the objective to maximize the number of simulation time steps until toggling occurs. In the first step a nominal optimization is performed. The resulting optimized point shows no toggling, but a Monte Carlo simulation reveals that this point is not robust. Small variations of the locations lead to toggling either in front or rear direction. Hence, robustness optimization is applied to push the distribution of time steps to higher values as far as possible. Two strategies are used and tested to find such a robust solution. First, robustness optimization based on a Kriging model is carried out. Additionally, an ANOVA is applied to identify the most important design variables. As an alternative, a simple "pushing-away" strategy is introduced, and the quality of the corresponding result is compared to the optimum of the Kriging based optimization.