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Entry  Thu Jul 21 05:22:26 2016, Aakash, Update, General, Temperature measurements across the enclosure | SURF 2016 script21jul2016.mfig1.pdffig2.pdffig3.pdf
    Reply  Thu Jul 21 21:38:44 2016, Aakash, Update, General, Temperature measurements across the enclosure | SURF 2016 
       Reply  Fri Jul 22 05:20:26 2016, Aakash, Update, General, Temperature measurements across the enclosure | SURF 2016 coherence.pdftransferfunc.pdftransferfuncdB.pdfscript22jul2016.m
Message ID: 12317     Entry time: Thu Jul 21 05:22:26 2016     Reply to this: 12323
Author: Aakash 
Type: Update 
Category: General 
Subject: Temperature measurements across the enclosure | SURF 2016 

I have measured the transfer function of temperature fluctuations inside the enclosure to that of the temperature fluctuations outside. The transfer function has been estimated by using 'tfestimate' which is library function in Matlab and which estimates the transfer function based on Welch's method. The attached plots shows the transfer function of the temperature inside the enclosure to that of outside temperature.

fig1.pdf

fig2.pdf

In order to determine a relation between temperature inside the enclosure to that of the outside temperature, I have calculated the mean squared coherence.  I have used Matlab's 'mscohere' library function which uses Welch's method to calculate the coherence. Attached plot shows the coherence between the temperature across the enclosure.

fig3.pdf

Also, I have attached the matlab script which I used for generating these plots.

script21jul2016.m

Attachment 1: script21jul2016.m  997 Bytes  Uploaded Thu Jul 21 06:27:55 2016  | Hide | Hide all
filename='2315on5july.dat';
data=importdata(filename);
%temperature data outside the enclosure on channel 2
data1=data(:,2); 
%temperature data inside the enclosure on channel 3
data2=data(:,3); 

%sampling frequency in Hz
fs=100; 
... 30 more lines ...
Attachment 2: fig1.pdf  4 kB  Uploaded Thu Jul 21 22:35:58 2016  | Hide | Hide all
fig1.pdf
Attachment 3: fig2.pdf  5 kB  Uploaded Thu Jul 21 22:36:16 2016  | Hide | Hide all
fig2.pdf
Attachment 4: fig3.pdf  5 kB  Uploaded Thu Jul 21 22:36:37 2016  | Hide | Hide all
fig3.pdf
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