nass-micro-station-measurements/static-to-dynamic/index.org

#+TITLE:Static Measurements
#+SETUPFILE: ../config.org

* Notes
- *5530*: Straightness Plot: Yz
- *Filename*: =r:\home\PDMU\PEL\Measurement_library\ID31\ID31_u_station\TY\12_12_2018\linear deviation _tyz_401_points.txt=
- *Acquisition date*: 09/01/2019 13:49:42
- *Current date*: 08/03/2019 08:46:35
- *Measurement Type*: STRAIGHTNESS vertical
- *Travel Mode*: Bidirectional
- *Number of Target Positions*: 401
- *Number of total data pairs*: 2406
- *Number of total data runs*:6
- *Position Value Units*:	millimeters
- *Error Value Units*:	micrometers

| Environmental Data | Min    | Max    | Avg    |
|--------------------+--------+--------+--------|
| Air Temp (C)       | 024,57 | 024,61 | 024,59 |
| Air Prs  (mm)      | 742,56 | 743,29 | 742,83 |
| Air Hmd  (%)       | 024,00 | 024,00 | 024,00 |
| MT1 Temp (C)       |        |        | 020,00 |
| MT2 Temp (C)       | 024,40 | 024,44 | 024,42 |
| MT3 Temp (C)       | 024,32 | 024,36 | 024,34 |

* Data Pre-processing
#+begin_src shell :results silent
  sed 's/\t/  /g;s/\,/./g' "data/linear deviation _tyz_401_points.txt" > data/data.txt
#+end_src

#+begin_src shell :exports both :post addhdr(*this*)
  head "data/data.txt"
#+end_src

#+RESULTS:
| Run | Pos | TargetValue |    ErrorValue |
|-----+-----+-------------+---------------|
|   1 |   1 |    -4.5E+00 | 7.5377892E+00 |
|   1 |   2 | -4.4775E+00 | 7.5422246E+00 |
|   1 |   3 |  -4.455E+00 | 7.5655617E+00 |
|   1 |   4 | -4.4325E+00 | 7.5149518E+00 |
|   1 |   5 |   -4.41E+00 | 7.4886377E+00 |
|   1 |   6 | -4.3875E+00 |  7.437007E+00 |
|   1 |   7 |  -4.365E+00 | 7.4449354E+00 |
|   1 |   8 | -4.3425E+00 | 7.3937387E+00 |
|   1 |   9 |   -4.32E+00 | 7.3287468E+00 |

* Matlab - Data Import
#+begin_src matlab :results silent
  filename = 'data/data.txt';
  fileID = fopen(filename);
  data = cell2mat(textscan(fileID,'%f  %f  %f  %f', 'collectoutput', 1,'headerlines',1));
  fclose(fileID);
#+end_src

* Data - Plot
#+begin_src matlab :results silent
  figure;
  hold on;
  for i=1:data(end, 1)
    plot(data(data(:, 1) == i, 3), data(data(:, 1) == i, 4), '-k');
  end
  hold off;
  xlabel('Target Value [mm]'); ylabel('Error Value [um]');
#+end_src

#+NAME: fig:raw_data
#+HEADER: :tangle no :exports results :results raw :noweb yes
#+begin_src matlab :var filepath="figs/raw_data.pdf" :var figsize="wide-tall" :post pdf2svg(file=*this*, ext="png")
  <<plt-matlab>>
#+end_src

#+NAME: fig:raw_data
#+CAPTION: Time domain Data
#+RESULTS: fig:raw_data
[[file:figs/raw_data.png]]


Compute mean value of each position
#+begin_src matlab :results silent
  mean_pos = zeros(sum(data(:, 1)==1), 1);
  for i=1:sum(data(:, 1)==1)
    mean_pos(i) = mean(data(data(:, 2)==i, 4));
  end
#+end_src

#+begin_src matlab :results silent
  figure;
  hold on;
  for i=1:data(end, 1)
    filt = data(:, 1) == i;
    plot(data(filt, 3), data(filt, 4) - mean_pos, '-k');
  end
  hold off;
  xlabel('Target Value [mm]'); ylabel('Error Value [um]');
#+end_src

#+NAME: fig:processed_data
#+HEADER: :tangle no :exports results :results raw :noweb yes
#+begin_src matlab :var filepath="figs/processed_data.pdf" :var figsize="wide-tall" :post pdf2svg(file=*this*, ext="png")
  <<plt-matlab>>
#+end_src

#+NAME: fig:processed_data
#+CAPTION: caption
#+RESULTS: fig:processed_data
[[file:figs/processed_data.png]]

* Translate to time domain
#+begin_src matlab :results none
  t = linspace(0, 1, length(data(data(:, 1)==1, 4)));
#+end_src

#+begin_src matlab :results none
  figure;
  hold on;
  plot(t, data(data(:, 1) == 1, 4) - mean_pos, '-k');
  hold off;
  xlabel('Time [s]'); ylabel('Error Value [um]');
#+end_src

#+NAME: fig:time_domain
#+HEADER: :tangle no :exports results :results raw :noweb yes
#+begin_src matlab :var filepath="figs/time_domain.pdf" :var figsize="wide-tall" :post pdf2svg(file=*this*, ext="png")
  <<plt-matlab>>
#+end_src

#+NAME: fig:time_domain
#+CAPTION: caption
#+RESULTS: fig:time_domain
[[file:figs/time_domain.png]]

* Compute the PSD
#+begin_src matlab :results none
  n_av = 5;
  Fs = 1/t(2);

  x = data(data(:, 1) == 1, 4) - mean_pos;
  [pxx, f] = pwelch(x, hanning(ceil(length(x)/n_av)), [], [], Fs);

  pxx_t = zeros(length(pxx), data(end, 1));

  for i=1:data(end, 1)
    x = data(data(:, 1) == i, 4) - mean_pos;
    [pxx, f] = pwelch(x, hanning(ceil(length(x)/n_av)), [], [], Fs);
    pxx_t(:, i) = pxx;
  end
#+end_src

#+begin_src matlab :results none
  figure;
  hold on;
  plot(f, mean(pxx_t, 2));
  hold off;
  xlabel('Frequency (Hz)');
  ylabel('PSD ($m^2/Hz$)');
  set(gca, 'XScale', 'log'); set(gca, 'YScale', 'log');
  legend({'PSD - x', 'PSD - y', 'PSD - z'});
#+end_src

#+NAME: fig:psd
#+HEADER: :tangle no :exports results :results raw :noweb yes
#+begin_src matlab :var filepath="figs/psd.pdf" :var figsize="wide-tall" :post pdf2svg(file=*this*, ext="png")
  <<plt-matlab>>
#+end_src

#+NAME: fig:psd
#+CAPTION: PSD of the Z motion when scanning with Ty at 1Hz
#+RESULTS: fig:psd
[[file:figs/psd.png]]