因此本文改进了传统的频谱诊断方法，提出了一种频谱分析结合轴心轨迹图的诊断思想，使得诊断结果更具有唯一性、准确性。
In this thesis , to improve the traditional diagnostic methods by spectrum analysis . Made a idea combination of spectrum analysis and axis track figure for ensure the diagnosis result was more unique and accurate .
频谱分析图