摘要
建立2自由度整车模型,通过使车辆系统横摆角速度增益为一定值确定车辆的理想传动比曲线。传统的变传动比曲线为一个分3段的分段函数,且在分段点处不光滑,这样会造成助转角电机在曲线分段点处产生较大的角加速度和角速度突变。利用Matlab软件对变传动比曲线进行多项式拟合,并且在分段点附近进行两点三次Hermite插值,从而使边传动比曲线在分段点光滑。在Simulink中进行仿真,其结果验证了改进后的变传动比曲线的性能。
Two degrees of freedom vehicle model was set up by making the vehicle system yawing angular velocity gain for a certain value to determine the ideal vehicle steering gear ratio. The traditional variable steering ratio curve is a piecewise function with three sections, and the piecewise point is not smooth, and it will cause the large mutation of angular acceleration of the assisting turn angle motor. By using MATLAB software to implement the polynomial fitting on variable transmission ratio curve and implement the Hermite interpolation near the subsection point, we tried to make the transmission ratio curve smooth on the piecewise point. And the performance of the improved variable transmission ratio curve was verified in Simulink.
出处
《重庆理工大学学报（自然科学）》
CAS
2015年第8期23-28,共6页
Journal of Chongqing University of Technology：Natural Science
关键词
主动转向
传动比曲线
拟合
电机
active steering
transmission ratio curve
fitting
motor
