B&K pulse 3560 frequency response h1&h2
请问有没有人知道B&K pulse 3560的Frequency Response H1与Frequency Response H2有何不同?给你个建议,你可以查一下帮助文档。 H1,和H2设置不同吗? x:input, y:output
H1=Gxy/Gxx; minimize errors in the result when extraneous noise contaminates the output signal
H2=Gyy/Gyx; minimize errors in the result when extraneous noise contaminates the input signal
H3=(H1+H2)/2; noise contaminates both the input and output signals
Ref:
http://blog.prosig.com/2009/10/19/a-simple-frequency-response-function/
http://digital.ni.com/public.nsf/allkb/3657963E2C0405D1862572C1004C0A3B http://digital.ni.com/public.nsf/allkb/6A3C69A12E00B26B86257498000C6867 ChaChing 发表于 2013-9-18 10:18 static/image/common/back.gif
x:input, y:output
H1=Gxy/Gxx; minimize errors in the result when extraneous noise contaminates the...
Thank you!! fenggaga 发表于 2013-9-20 17:00 static/image/common/back.gif
Thank you!!
同一掛的嗎? H1估计是输入和响应的互谱平均除以输入的自谱平均;H2估计则是输出的自谱平均除以输入和输出的互谱平均。其中H1没能考虑输入的噪声影响,也就是说H1估计式中分母中含有噪声,是欠估计;H2则是没有考虑输出的噪声影响,H2估计式中分子含有噪声影响,是过估计。一般在噪声测试控制领域,更多的使用Hv估计。
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