... parameter-error vector 参数误差向量 pendulum vector 摆矢 period vector 周期向量 ...
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New variable is introduced based on energetic equation, the period of vibration of three wire pendulum is studied using the method of rotating vector.
由能量方程出发,引入新变量,用旋转矢量法讨论了三线摆大角度摆动时的周期。
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