基于容差模型的半挂汽车列车行驶平顺性优化

摘要

When traditional deterministic optimization is applied in the design of semitrailer train ride comfort, low reliability is produced due to neglect of uncertainty which causes design variable fluctuation. 9-DOF of semitrailer train ride comfort model is established, and based on the consideration of design variable fluctuation, a robust optimized mathematics model based on tolerance model is established. The optimization results are compared with deterministic optimization results, which show that both of the two methods improve ride comfort, whereas the robust optimization has better reliability than the traditional deterministic optimization design.%采用传统的确定性优化方法对半挂汽车列车行驶平顺性进行设计时，由于忽略了不确定因素导致设计变量波动情况，从而获得的优化结果可靠性低。建立了9自由度的半挂汽车列车平顺性模型，在考虑设计变量波动的基础上，建立了基于容差模型的稳健优化数学模型。将优化结果与确定性优化结果对比可知，两种方法均提高了平顺性能，但是稳健性优化可靠度更高。