为改善逆变器系统在严重不平衡负载情况下输出电压的对称性，文中提出一种新颖的控制策略——旋转坐标系下的PIR - P双环控制。
This paper presents a new method that PIR-P dual loop control based on rotating coordinates to improve the output voltage symmetry of inverter under the serious unbalanced load condition.
本文给出了转子和平衡环质量不平衡的双平衡环挠性陀螺的动力学方程，推广了理想情况下的陀螺动力学方程。
The dynamical equations for a two-gimbal dynamically tuned gyroscope with mass unbalance in both the rotor and the gimbals are put forward as a development based on ideal suspension.
成品结是不平衡的，只有一环指着左边相比，这两个循环的几乎所有其他的鞋带海里。
The finished knot is lopsided, with only one loop pointing to the left, as compared to the two loops of almost all other shoelace knots.
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