周期性误差是匀速直线运动降质图像复原中普遍存在的现象，它严重影响复原图像质量。

Periodic error commonly appear in restoring uniform motion blurred picture, its appearance degrade the quality of restored image heavily.

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结果表明：该方法能够有效地抑制位置反馈元件周期性误差导致的速率波动，提高转台的速率平稳性。

The results show that this method can efficiently restrain the rate ripple of the table caused by the periodic errors of position feedback elements, and can raise the rate stability of tables.

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所提出的测试方案和辨识方法解决了地球自转角速度对陀螺加速度计的输出造成周期性误差这一重要问题。

The test scheme and identification method were given which solved the problem of periodic error caused by the earth rotation angular velocity.

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