Design and Evaluation of Non-dimensionalised Automotive Suspension Parameters

Abstract

Abstract: A method for evaluating and designing suspension parameters was presented herein. A quarter vehicle model was employed to develop the transfer function of the suspension vibration system, and then a non-dimensionalised expression for the suspension responses was presented in terms of non-dimensionalised factors. Based on the obtained expressions, the effects of non-dimensionalised factors on the sprung mass acceleration, rattle space, and tire deflection were investigated. Considering the nonlinearity of the suspension stiffness and damping, and the uncertainty of sprung mass, the performances of different parameter combinations were evaluated with radar chart, in order to obtain some parameter combinations corresponding to better compromised performances. The obtained results indicate that the non-dimensionalised parameter design method may effectively evaluate the performances of the suspension system with nonlinear stiffness and damping, as well as uncertainty of sprung mass.

Key words: non-dimensionalised, nonlinearity, uncertainty, suspension design

摘要： 提出一种量纲一化的悬架参数设计及评价方法。将悬架系统性能评价指标进行量纲一化描述，并分析了量纲一算子对簧载质量加速度、悬架动挠度、轮胎动态压缩的影响。考虑悬架刚度和阻尼非线性与簧载质量不确定性因素，结合雷达图评价了多种参数组合下的悬架的折中性能，从而获得最佳的参数组合。结果表明，该方法可对具有参数非线性和质量不确定性悬架系统的性能进行有效的综合评价，对实际工程设计具有指导意义。

关键词: 量纲一化, 非线性, 不确定性, 悬架设计

CLC Number:

U461.1

Chai Tian, Han Xu, Ding Fei, Lei Fei. Design and Evaluation of Non-dimensionalised Automotive Suspension Parameters[J]. China Mechanical Engineering.

柴天, 韩旭, 丁飞, 雷飞. 量纲一化的悬架参数设计及评价方法[J]. 中国机械工程.

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