转向系统传递函数的研究及理想传动比获取  

Transfer function of steering system and acquisition method of ideal steering ratio

作　　者：程准[1] 鲁植雄[1] 龚佳慧 刁秀永[1] 

机构地区：[1]南京农业大学工学院,江苏南京210031

出　　处：《浙江大学学报（工学版）》2016年第7期1276-1283,共8页Journal of Zhejiang University：Engineering Science

基　　金：江苏省科技支撑计划资金资助项目(BE2012384);江苏省科技成果转化专项资金资助项目(BA2010055)

摘　　要：基于对新建立的6自由度非线性转向模型的研究,提出采用传递函数代替原转向模型的方法,提出求解传递函数的新方法.利用改进的模拟退火算法求解传递函数,采用不同的插值法建立传递函数的动态参数变化模型,对不同的插值法进行比较.基于得到的转向传递函数模型,针对现阶段获取理想传动比方式的缺陷,提出稳态增益理想传动比动态精确获取方法.研究结果表明,转向传递函数输出的响应曲线与原系统的响应曲线非常吻合,精度极高,该传递函数能够替代原先复杂的系统;动态参数变化模型能够很好地表征传递函数的参数随车速、传动比和转向盘转角的变化关系;理想传动比的动态精确获取能够实时保证在车速和方向盘不断变化下转向增益维持理想的定值.The transfer function was used instead of the original steering model based on the new nonlinearsteering model of six DOFs. A new method was proposed to solve the transfer function. The improvedsimulated annealing algorithm was used to solve the transfer function. Then different interpolation methodswere used to establish the transfer function parameters？ model of dynamic change. Different interpolationmethods were compared with the results. A new method for obtaining the ideal steering ratio was proposedbased on the model of the steering transfer function in order to overcome the shortcomings of thecurrent methods. Results showed that the response curve of the steering transfer function accorded withthe response curve of the original system, and the transfer function can replace the original complex system.Dynamic change parameter model can characterize the relationship between the parameters of thetransfer function with the speed, transmission ratio and steering wheel angle. Dynamic accurate acquisitionof ideal steering ratio can guarantee the constant change in the speed and steering wheel to maintain the desiredvalue of the steering gain.

关 键 词：线控转向 非线性 传递函数 模拟退火算法 理想传动比 

分 类 号：U463[机械工程—车辆工程]