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机械故障的判定常采用的是基于ＦＦＴ分析的方法，但其对非线性情形效果不理想，本文从非线性理论出发提出了一种判定故障的新方法，实践证明是成功的。
The decision of mechanical failure is often based on the method of FFT analysis, but its effect on nonlinear situations is not satisfactory. Based on the nonlinear theory, this paper presents a new method to determine the fault, and proved to be successful.