Aim To determine the measured profile of a wheel in railway vehicle. Methods So - called piecewise curve-fitting method of the third derivative continuity is employed.
目的拟合列车车轮踏面的实恻轮廓曲线，方法采用三阶导数连续的分段曲线拟合法。
2
Some preliminary results of continuity and stability of nonlinear system with piecewise linearized control are given. An application of the results is discussed briefly.