micheller85@126 发表于 2014-9-15 16:00

L指数之和为零什么意思呢

请问系统有一个单周期激励，但是没有阻尼，算出来的L指数之和一直为零，说明什么问题呢？

Kevin_HIT 发表于 2014-10-10 21:12

学习了学习了

孟铭恩 发表于 2014-10-21 16:02

you can get the answer from Data processing and analysis procedures for condition monitoring of machines for the purpose of diagnostics(including communication formats, metheds for displaying exchanging data)
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