A step motor phase locking control system and it's velocity error dampingmethod is presented in this paper. A convenient method for engineering design is also given.
Two methods have been presented in this paper to treat this case. They are tangent method and minimum equivalent linear dampingmethod. Their relation has been found, too.
为此，本文提出了两种处理方法，即切线法和最小当量线性阻尼法，并找出了它们的关系。
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For this theory, it is better than the traditional fixed damping conjugate gradient method.