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浙江大学学报(工学版)
JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)
Civil Engineering     
Transfer function of steering system and acquisition method of ideal steering ratio
CHENG Zhun,LU Zhi xiong,GONG Jia hui,DIAO Xiu yong
College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
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Abstract  

The transfer function was used instead of the original steering model based on the new nonlinear steering model of six DOFs. A new method was proposed to solve the transfer function. The improved simulated annealing algorithm was used to solve the transfer function. Then different interpolation methods were used to establish the transfer function parameters’ model of dynamic change. Different interpolation methods were compared with the results. A new method for obtaining the ideal steering ratio was proposed based on the model of the steering transfer function in order to overcome the shortcomings of the current methods. Results showed that the response curve of the steering transfer function accorded with the 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 the transfer function with the speed, transmission ratio and steering wheel angle. Dynamic accurate acquisition of ideal steering ratio can guarantee the constant change in the speed and steering wheel to maintain the desired value of the steering gain．

Published: 23 July 2016
CLC:  U 463  
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CHENG Zhun,LU Zhi xiong,GONG Jia hui,DIAO Xiu yong. Transfer function of steering system and acquisition method of ideal steering ratio. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2016, 50(7): 1276-1283.

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http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2016.07.008     OR     http://www.zjujournals.com/eng/Y2016/V50/I7/1276


转向系统传递函数的研究及理想传动比获取

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.

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