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By making use of the pulse-force, the point on the rotor's plane of the system is beaten. And at the same time, the responses on different points are gathered. 用脉冲力激振转子系统的同时采集系统的多点响应，相关分析法提取测点的自由振动响应，用对数衰减率判据评定该系统的稳定性。