The three-step search method is a commonly used fast motion estimation algorithm, but its initial step length is too big, thus the estimation effect of slow motion sequence is not so satisfactory.

三步搜索法是一种常用的快速运动估计算法，但由于它的初始步长太大而导致对缓慢运动序列的估计效果不能令人满意。

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Analysis on the effect of parameter estimation and forecast accuracy according to the select of variable factors.

变量因子选择对参数估计和估测精度的影响分析。

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Saturation effect is considered for the rotor position estimation. The mathematical model including saturation is built for compensating the effect of saturation.

考虑电机的饱和对转子位置估计的影响，建立了包含电机饱和影响的数学模型，以补偿饱和对转子磁极位置估计的影响；

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