Through computer simulation test the influence of the above parameters upon grain trajectories and grain losses were studied, which is necessary for guiding the further experimental work.

通过计算机模拟实验，研究了运动参数与结构参数对籽粒运动轨迹和落粒损失的影响规律，为台架实验奠定了理论基础。

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This paper mainly describes the amplitude and phase errors caused by zero-order holder and the error caused by finite word length of D/A, and computer simulation test of D/A error is also introuced.

针对零阶保持器引起的幅度误差和相位误差，以及D/A转换器有限字长引起的误差进行了较为详细的分析，并进行了D/A误差仿真试验。

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