ASD转换成PSD或ASD转换成时域信号的请教
现有ACC(g)--Frequence(Hz)曲线如图:data:image/png;base64,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,1我需要转换成PSD图,是直接g平方再除以Hz吗?
2我想得到时域曲线该怎么办?
3 弱弱问一句这个曲线有没有可能不是ASD图?感觉怪怪的...
再发一次图片
没见过这种图,加速度-频率图不能从0Hz开始!频率坐标如此不合比例!请将来龙去脉说清楚! hcharlie 发表于 2016-5-19 08:56
没见过这种图,加速度-频率图不能从0Hz开始!频率坐标如此不合比例!请将来龙去脉说清楚!
这是客户给的输入,仅有的输入。让在多自由度台架上当成输入做疲劳试验。我们专家认为这是PSD图(ASD),然后根据这个做了一段时域随机信号,PSD一下大概和输入是差不多的。然后进行试验发现载荷太大,很快试验件就坏掉了,这个不合理的。所以我对这个是不是PSD产生怀疑。
问题:如果不是PSD图,就是一个加载曲线,类似扫频能实现吗?比如像发动机频率一样,我逐渐提高转速,对应频率增加,然后稳定一段转速,最后降低转速。如果是这样加速度的值能按照曲线一样控制吗?我这块不大懂。 hcharlie 发表于 2016-5-19 08:56
没见过这种图,加速度-频率图不能从0Hz开始!频率坐标如此不合比例!请将来龙去脉说清楚!
主任,请教一下,如果这个图是ASD图,我直接平方除以Hz就直接得到PSD图了吗?
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