基于通用简谐梯形组合运动规律的构成方法，建立了凸轮机构从动件无因次通用曲线方程。
On the basis of a composing method of universal harmonic trapezoid motion laws, nondimensional general curve formulation of driven cam is built.
早期通用变频器大多为开环恒压比的控制方式，控制曲线不稳定。
The adopted control mode of previous common frequency converter is usually of open loop constant voltage ratio, which its control curve is not stable.
阐述了参数曲线恒速插补的通用原理，同时讨论了轮廓误差近似计算方法。
The paper develops general interpolation principals for parametric curves with constant feedrate, and contour error's approximate evaluations are discussed also.
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