四轮转向汽车的MATLAB实现，3种实现方式。输入量为前后轮的旋转角度，输出量为汽车侧偏角和横摆角速度。6.5版本编写。-MATLAB realization of four-wheel steering vehicle, 3 implementation. Enter the amount of rotation of front and rear wheels, the output volume for the automotive side slip angle and yaw rate. 6.5 preparation.