Peoples always wish to identify rotor unbalance with the vibration information obtained from the operating rotor, but there are no mature and practicable methods available yet.
人们一直希望能通过转子运转状态下获得的振动信息经济、快捷地识别出转子的不平衡量，但尚未有成熟可行的方法。
There is inevitable unbalance in the dual-rotor system of the aero-engine, the beat vibration will occur to engine when two rotors are operating at approximately the same speed.
在双转子航空发动机中，由于转子系统不可避免地存在不平衡量，当两个转子的转速比较接近时，发动机会出现拍振现象，拍振将引起振动强度过大问题。
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