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本文针对作图法的弊端，采用牛顿迭代法求研磨体运动分析中θ2的数值解，并给出了迭代初始值θ2o的取值方法，以求避免或减少设计中的人为误差，提高设计精度．
In this paper, in view of the drawbacks of the mapping method, the numerical solution of θ2 in the motion analysis of grinding body is obtained by Newton iteration method. The method of initial value of θ2o is given in order to avoid or reduce the human error in design and improve the design accuracy .