本文提出了建立数学模型的平衡原理方法，并从宏观和微观两种角度讨论了其应用。
This paper supplies balance principle method for building mathematical model, and discusses its application from two aspects.
文中分析了系统平衡变换原理，讨论了系统的平衡方式、补偿电流检测与有源滤波器控制方法。
In this paper, the principle of balanced transformation is analyzed; the balance mode, detection of compensating currents and controlling method of the active filter are discussed.
介绍了动平衡的原理、步骤及试验方法。
The principle, step and testing method of dynamic balance are introduced.
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