To obtain accurate normal frequency dispersion equation was solved by an efficient numerical algorithm.

对于简正波,运用高效数值方法解频散方程,提高了简正波的计算精确和速度.

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Compared with the normal frequency - domain modal analysis method, it is more exact in parameter identification.

对比一般频域模态方法, 该方法对模态参数识别更准确.

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Due to the specific characteristic of oil pumping load, normal frequency converters achieve little.

由于抽油机负载的特殊性, 普通的变频器不能很好的发挥作用.

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