灵敏度方法在汽车设计中的应用

本文介绍了灵敏度方法，该方法可用来了解汽车参数改变对汽车系统响应的影响。不管所建的汽车数学模型复杂与否，此方法都可以对系统进行分析。应用时可采用不同的灵敏度函数形式：具有量纲与无量纲，包括一阶标准、百分比、对数和高阶标准灵敏度函数。灵敏度函数定义为系统变量对系统参数的偏微分。该方法可以研究系统时变与非时变参数对系统变量的影响，且可以缩短汽车系统的设计周期，避免实车试验带来的巨大经济负担。

Application of Sensitivity Methods to Designing Vehicle Dynamic Systems

The development and application of sensitivity methods for determining the effects of parameter changes the response of vehicle dynamic systems is presented. The procedures shown can be used to enhance the analysis and synthesis processes of virtually any road vehicle system regardless of its complexity. The parameter sensitivity of ve- hicle models can be investigated using different types of sensitivity function, both dimen- sional and dimensionless including first order standard,pcrccntage,logarithmic and high- er order standard. These sensitivity functions are determined as functions of partial derivatives of system variables taken with respect to system parameters. The methods presented enable to determine the influence of all system constant and non-constant pa- rameters on system variables. The methods can shorten foe designing of vehicle system and reduce the tremendous cost for real vehicle testing.