There are three methods for the determination of the acceleration based on differential GPS carrier-phase technology: position differentiating, velocity differentiating and direct carrier method.
利用GPS差分技术确定载体运动加速度，其方法有三种：位置微分法、速度微分法和加速度直接解算法。
It is found that the displacement input model is more accurate than the generally used acceleration input model, given the same direct integration method and time step.
数值计算结果表明，若采用相同的数值积分方法和积分步长，位移输入模型可获得比加速度输入模型更高的计算精度。
Using direct calculation method can easily change in acceleration and deceleration time, maximum start frequency, maximum operating frequency in order to adapt to different processing conditions.
采用直接计算的方式可以方便的改变加减速的时间、最高启动频率、最高运行频率以适应不同的加工状况。
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