Add data analysis of Ty scans

disturbance-ty/index.org

@@ -1,4 +1,4 @@
-#+TITLE: Vibrations induced by the Slip-Ring and the Spindle
+#+TITLE: Vibrations induced by the translation stage motion
 :DRAWER:
 #+STARTUP: overview
 
@@ -30,20 +30,475 @@
 :END:
 
 * Measurement description
-One geophone at the sample position
+** Setup                                                             :ignore:
-One geophone on the marble
+*Setup*:
+Two geophone are use:
+- One is on the marble (corresponding to the first column in the data)
+- One at the sample location (corresponding to the second column in the data)
 
-Each of the signal is amplified by voltage amplifier:
+Two voltage amplifiers are used, their setup is:
-- 40db!!!
+- gain of 40dB (the gain at the be lowered from 60dB to 40dB to not saturate the voltage amplifiers)
-- AC
+- AC/DC switch on AC
-- 1kHz
+- Low pass filter at 1kHz
 
-col1: marble
+A first order low pass filter is also added at the input of the voltage amplifiers.
-col2: sample
 
-Ty Scans:
+Scans are done with the translation stage following sinus reference at 1Hz with amplitude of 600 000 cnt (= 3mm)
-- sin @ 1Hz with amplitude = 600 000 cnt (= 3mm)
+The scans are done with the ELMO software.
 
-- meas 40: Z direction
+The North of the Geophones corresponds to the +Y direction and the East of the Geophones to the +X direction (see figure [[fig:experimental_setup_picture]]).
-- meas 41: E direction
+
-- meas 42: E direction without any motion (Ty OFF)
+The spindle and slip-ring are turned ON. The Hexapod and the tilt-stage are OFF.
+
+** Goal                                                              :ignore:
+*Goal*:
+- Determine the disturbances induced by the translation stage in the Z and X directions when scanning along the Y direction
+
+** Measurements                                                      :ignore:
+*Measurements*:
+Three measurements are done:
+| Measurement File   | Description                             |
+|--------------------+-----------------------------------------|
+| =mat/data_040.mat= | Z direction                             |
+| =mat/data_041.mat= | E direction                             |
+| =mat/data_042.mat= | E direction without any motion (Ty OFF) |
+
+Each of the measurement =mat= file contains one =data= array with 3 columns:
+| Column number | Description       |
+|---------------+-------------------|
+|             1 | Geophone - Marble |
+|             2 | Geophone - Sample |
+|             3 | Time              |
+
+#+name: fig:experimental_setup_picture
+#+caption: Picture of the experimental setup
+#+attr_html: :width 500px
+[[file:./img/IMG_20190513_163032.jpg]]
+
+* Measurement Analysis
+  :PROPERTIES:
+  :header-args:matlab+: :tangle matlab/disturbance_ty.m
+  :header-args:matlab+: :comments org :mkdirp yes
+  :END:
+  <<sec:disturbance_ty>>
+
+** ZIP file containing the data and matlab files                     :ignore:
+#+begin_src bash :exports none :results none
+  if [ matlab/disturbance_ty.m -nt data/disturbance_ty.zip ]; then
+    cp matlab/disturbance_ty.m disturbance_ty.m;
+    zip data/disturbance_ty \
+        mat/data_040.mat \
+        mat/data_041.mat \
+        mat/data_042.mat \
+        mat/sin_elmo.csv \
+        disturbance_ty.m
+    rm disturbance_ty.m;
+  fi
+#+end_src
+
+#+begin_note
+  All the files (data and Matlab scripts) are accessible [[file:data/disturbance_ty.zip][here]].
+#+end_note
+
+** Matlab Init                                              :noexport:ignore:
+#+begin_src matlab :tangle no :exports none :results silent :noweb yes :var current_dir=(file-name-directory buffer-file-name)
+<<matlab-dir>>
+#+end_src
+
+#+begin_src matlab :exports none :results silent :noweb yes
+<<matlab-init>>
+#+end_src
+** Load data
+#+begin_src matlab
+  z_ty = load('mat/data_040.mat', 'data'); z_ty = z_ty.data;
+  e_ty = load('mat/data_041.mat', 'data'); e_ty = e_ty.data;
+  e_of = load('mat/data_042.mat', 'data'); e_of = e_of.data;
+#+end_src
+
+** Time domain plots
+#+begin_src matlab
+  figure;
+  hold on;
+  plot(z_ty(:, 3), z_ty(:, 1), 'DisplayName', 'Marble - Z');
+  plot(z_ty(:, 3), z_ty(:, 2), 'DisplayName', 'Sample - Z');
+  hold off;
+  xlabel('Time [s]'); ylabel('Voltage [V]');
+  xlim([0, 100]); ylim([-5, 5]);
+  legend('Location', 'northeast');
+#+end_src
+
+#+NAME: fig:ty_z_time
+#+HEADER: :tangle no :exports results :results value raw replace :noweb yes
+#+begin_src matlab :var filepath="figs/ty_z_time.pdf" :var figsize="full-tall" :post pdf2svg(file=*this*, ext="png")
+  <<plt-matlab>>
+#+end_src
+
+#+NAME: fig:ty_z_time
+#+CAPTION: Z motion of the sample and marble when scanning with the translation stage
+#+RESULTS: fig:ty_z_time
+[[file:figs/ty_z_time.png]]
+
+#+begin_src matlab :exports none
+  xlim([0, 1])
+#+end_src
+
+#+NAME: fig:ty_z_time_zoom
+#+HEADER: :tangle no :exports results :results value raw replace :noweb yes
+#+begin_src matlab :var filepath="figs/ty_z_time_zoom.pdf" :var figsize="full-tall" :post pdf2svg(file=*this*, ext="png")
+  <<plt-matlab>>
+#+end_src
+
+#+NAME: fig:ty_z_time_zoom
+#+CAPTION: Z motion of the sample and marble when scanning with the translation stage - Zoom
+#+RESULTS: fig:ty_z_time_zoom
+[[file:figs/ty_z_time_zoom.png]]
+
+
+#+begin_src matlab
+  figure;
+  hold on;
+  plot(e_ty(:, 3), e_ty(:, 1), 'DisplayName', 'Marble - X');
+  plot(e_ty(:, 3), e_ty(:, 2), 'DisplayName', 'Sample - X');
+  hold off;
+  xlabel('Time [s]'); ylabel('Voltage [V]');
+  xlim([0, 100]); ylim([-10, 10]);
+  legend('Location', 'northeast');
+#+end_src
+
+#+NAME: fig:ty_e_time
+#+HEADER: :tangle no :exports results :results value raw replace :noweb yes
+#+begin_src matlab :var filepath="figs/ty_e_time.pdf" :var figsize="full-tall" :post pdf2svg(file=*this*, ext="png")
+  <<plt-matlab>>
+#+end_src
+
+#+NAME: fig:ty_e_time
+#+CAPTION: Motion of the sample and marble in the east direction when scanning with the translation stage
+#+RESULTS: fig:ty_e_time
+[[file:figs/ty_e_time.png]]
+
+#+begin_src matlab :exports none
+  xlim([0, 1])
+#+end_src
+
+#+NAME: fig:ty_e_time_zoom
+#+HEADER: :tangle no :exports results :results value raw replace :noweb yes
+#+begin_src matlab :var filepath="figs/ty_e_time_zoom.pdf" :var figsize="full-tall" :post pdf2svg(file=*this*, ext="png")
+  <<plt-matlab>>
+#+end_src
+
+#+NAME: fig:ty_e_time_zoom
+#+CAPTION: Motion of the sample and marble in the east direction when scanning with the translation stage - Zoom
+#+RESULTS: fig:ty_e_time_zoom
+[[file:figs/ty_e_time_zoom.png]]
+
+** Frequency Domain analysis
+We first compute some parameters that will be used for the PSD computation.
+#+begin_src matlab
+  dt = z_ty(2, 3)-z_ty(1, 3);
+
+  Fs = 1/dt; % [Hz]
+
+  win = hanning(ceil(10*Fs));
+#+end_src
+
+Then we compute the Power Spectral Density using =pwelch= function.
+
+First for the geophone located on the marble
+#+begin_src matlab
+  [pxz_ty_m, f] = pwelch(z_ty(:, 1), win, [], [], Fs);
+  [pxe_ty_m, ~] = pwelch(e_ty(:, 1), win, [], [], Fs);
+  [pxe_of_m, ~] = pwelch(e_of(:, 1), win, [], [], Fs);
+#+end_src
+
+And for the geophone located at the sample position.
+#+begin_src matlab
+  [pxz_ty_s, f] = pwelch(z_ty(:, 2), win, [], [], Fs);
+  [pxe_ty_s, ~] = pwelch(e_ty(:, 2), win, [], [], Fs);
+  [pxe_of_s, ~] = pwelch(e_of(:, 2), win, [], [], Fs);
+#+end_src
+
+And we plot the ASD of the measured signals:
+- figure [[fig:asd_east_marble]] compares the marble motion in the east direction when scanning and when Ty is OFF
+- figure [[fig:asd_east_sample]] compares the sample motion in the east direction when scanning and when Ty is OFF
+- figure [[fig:asd_z_direction]] shows the marble and sample motion in the Z direction when scanning with the translation stage
+
+#+begin_src matlab
+  figure;
+  hold on;
+  plot(f, sqrt(pxe_ty_m), 'DisplayName', 'Ty 1Hz - Marble - X');
+  plot(f, sqrt(pxe_of_m), 'DisplayName', 'Ty OFF - Marble - X');
+  hold off;
+  set(gca, 'xscale', 'log');
+  set(gca, 'yscale', 'log');
+  xlabel('Frequency [Hz]'); ylabel('ASD of the measured Voltage $\left[\frac{V}{\sqrt{Hz}}\right]$')
+  legend('Location', 'northwest');
+  xlim([0.1, 500]); ylim([1e-5, 1e1]);
+#+end_src
+
+#+NAME: fig:asd_east_marble
+#+HEADER: :tangle no :exports results :results value raw replace :noweb yes
+#+begin_src matlab :var filepath="figs/asd_east_marble.pdf" :var figsize="full-tall" :post pdf2svg(file=*this*, ext="png")
+  <<plt-matlab>>
+#+end_src
+
+#+NAME: fig:asd_east_marble
+#+CAPTION: Amplitude spectral density of the measure voltage corresponding to the geophone in the east direction located on the marble when the translation stage is OFF and when it is scanning at 1Hz
+#+RESULTS: fig:asd_east_marble
+[[file:figs/asd_east_marble.png]]
+
+
+#+begin_src matlab
+  figure;
+  hold on;
+  plot(f, sqrt(pxe_ty_s), 'DisplayName', 'Ty 1Hz - Sample - X');
+  plot(f, sqrt(pxe_of_s), 'DisplayName', 'Ty OFF - Sample - X');
+  hold off;
+  set(gca, 'xscale', 'log');
+  set(gca, 'yscale', 'log');
+  xlabel('Frequency [Hz]'); ylabel('ASD of the measured Voltage $\left[\frac{V}{\sqrt{Hz}}\right]$')
+  legend('Location', 'northwest');
+  xlim([0.1, 500]); ylim([1e-5, 1e1]);
+#+end_src
+
+#+NAME: fig:asd_east_sample
+#+HEADER: :tangle no :exports results :results value raw replace :noweb yes
+#+begin_src matlab :var filepath="figs/asd_east_sample.pdf" :var figsize="full-tall" :post pdf2svg(file=*this*, ext="png")
+  <<plt-matlab>>
+#+end_src
+
+#+NAME: fig:asd_east_sample
+#+CAPTION: Amplitude spectral density of the measure voltage corresponding to the geophone in the east direction located at the sample location when the translation stage is OFF and when it is scanning at 1Hz
+#+RESULTS: fig:asd_east_sample
+[[file:figs/asd_east_sample.png]]
+
+
+#+begin_src matlab
+  figure;
+  hold on;
+  plot(f, sqrt(pxz_ty_m), 'DisplayName', 'Ty 1Hz - Marble - Z');
+  plot(f, sqrt(pxz_ty_s), 'DisplayName', 'Ty 1Hz - Sample - Z');
+  hold off;
+  set(gca, 'xscale', 'log');
+  set(gca, 'yscale', 'log');
+  xlabel('Frequency [Hz]'); ylabel('ASD of the measured Voltage $\left[\frac{V}{\sqrt{Hz}}\right]$')
+  legend('Location', 'northwest');
+  xlim([0.1, 500]); ylim([1e-5, 1e1]);
+#+end_src
+
+#+NAME: fig:asd_z_direction
+#+HEADER: :tangle no :exports results :results value raw replace :noweb yes
+#+begin_src matlab :var filepath="figs/asd_z_direction.pdf" :var figsize="full-tall" :post pdf2svg(file=*this*, ext="png")
+  <<plt-matlab>>
+#+end_src
+
+#+NAME: fig:asd_z_direction
+#+CAPTION: Amplitude spectral density of the measure voltage corresponding to the geophone in the vertical direction located on the granite and at the sample location when the translation stage is scanning at 1Hz
+#+RESULTS: fig:asd_z_direction
+[[file:figs/asd_z_direction.png]]
+
+** Transfer function from marble motion in the East direction to sample motion in the East direction
+Let's compute the transfer function for the marble motion in the east direction to the sample motion in the east direction.
+
+We first plot the time domain motions when every stage is off (figure [[fig:east_marble_sample]]).
+
+#+begin_src matlab
+  figure;
+  hold on;
+  plot(e_of(:, 3), e_of(:, 2), 'DisplayName', 'Sample - X');
+  plot(e_of(:, 3), e_of(:, 1), 'DisplayName', 'Marble - X');
+  hold off;
+  xlabel('Time [s]'); ylabel('Voltage [V]');
+  xlim([0, 100]); ylim([-1, 1]);
+  legend('Location', 'northeast');
+#+end_src
+
+#+NAME: fig:east_marble_sample
+#+HEADER: :tangle no :exports results :results value raw replace :noweb yes
+#+begin_src matlab :var filepath="figs/east_marble_sample.pdf" :var figsize="wide-normal" :post pdf2svg(file=*this*, ext="png")
+  <<plt-matlab>>
+#+end_src
+
+#+NAME: fig:east_marble_sample
+#+CAPTION: East motion of the marble and sample when all the stages are OFF
+#+RESULTS: fig:east_marble_sample
+[[file:figs/east_marble_sample.png]]
+
+
+We then compute the transfer function using =tfestimate=.
+#+begin_src matlab
+  dt = e_of(2, 3)-e_of(1, 3);
+  Fs = 1/dt; % [Hz]
+  win = hanning(ceil(10*Fs));
+
+  [T, f] = tfestimate(e_of(:, 1), e_of(:, 2), win, [], [], Fs);
+#+end_src
+
+
+The result is shown on figure [[fig:tf_east_marble_sample]].
+#+begin_src matlab :exports none
+  figure;
+  ax1 = subplot(2, 1, 1);
+  hold on;
+  plot(f, abs(T));
+  hold off;
+  set(gca, 'xscale', 'log'); set(gca, 'yscale', 'log');
+  set(gca, 'XTickLabel',[]);
+  ylabel('Magnitude');
+
+  ax2 = subplot(2, 1, 2);
+  hold on;
+  plot(f, mod(180+180/pi*phase(T), 360)-180);
+  hold off;
+  set(gca, 'xscale', 'log');
+  ylim([-180, 180]);
+  yticks([-180, -90, 0, 90, 180]);
+  xlabel('Frequency [Hz]'); ylabel('Phase [deg]');
+
+  linkaxes([ax1,ax2],'x');
+  xlim([10, 100]);
+#+end_src
+
+#+NAME: fig:tf_east_marble_sample
+#+HEADER: :tangle no :exports results :results value raw replace :noweb yes
+#+begin_src matlab :var filepath="figs/tf_east_marble_sample.pdf" :var figsize="full-tall" :post pdf2svg(file=*this*, ext="png")
+  <<plt-matlab>>
+#+end_src
+
+#+NAME: fig:tf_east_marble_sample
+#+CAPTION: Estimation of the transfer function from marble motion in the east direction to sample motion in the east direction
+#+RESULTS: fig:tf_east_marble_sample
+[[file:figs/tf_east_marble_sample.png]]
+
+** Position of the translation stage and Current
+The position of the translation and current flowing in its actuator are measured using the elmo software and saved as an csv file.
+
+*** Data pre-processing
+Let's look at at the start of the csv file.
+
+#+begin_src bash :results output
+  sed -n 1,30p mat/sin_elmo.csv | nl -ba -
+#+end_src
+
+#+RESULTS:
+#+begin_example
+     1	Elmo txt chart ver 2.0
+     2
+     3	[File Properties]
+     4	Creation Time,2019-05-13 05:11:45
+     5	Last Updated,2019-05-13 05:11:45
+     6	Resolution,0.001
+     7	Sampling Time,5E-05
+     8	Recording Time,5.461
+     9
+    10	[Chart Properties]
+    11	No.,Name,X Linear,X No.
+    12	1,Chart #1,True,0
+    13	2,Chart #2,True,0
+    14
+    15	[Chart Data]
+    16	Display No.,X No.,Y No.,X Unit,Y Unit,Color,Style,Width
+    17	1,1,2,sec,N/A,ff0000ff,Solid,TwoPoint
+    18	2,1,3,sec,N/A,ff0000ff,Solid,TwoPoint
+    19	2,1,4,sec,N/A,ff007f00,Solid,TwoPoint
+    20
+    21	[Signal Names]
+    22	1,Time (sec)
+    23	2,Position [cnt]
+    24	3,Current Command [A]
+    25	4,Total Current Command [A]
+    26
+    27	[Signals Data Group 1]
+    28	1,2,3,4,
+    29	0,1110769,-0.320872406596209,-0.320872406596209,
+    30	0.001,1108743,-0.319658428261391,-0.319658428261391,
+#+end_example
+
+The real data starts at line 29.
+We then load this =cvs= file starting at line 29.
+
+#+begin_src matlab
+  data = csvread("mat/sin_elmo.csv", 29, 0);
+#+end_src
+
+*** Time domain data
+We plot the position of the translation stage measured by the encoders.
+There is 200000 encoder count for each mm, we then divide by 200000 to obtain mm.
+The result is shown on figure [[fig:ty_position_time]].
+
+#+begin_src matlab
+  figure;
+  hold on;
+  plot(data(:, 1), data(:, 2)/200000);
+  hold off;
+  xlim([0, 5]);
+  xlabel('Time [s]'); ylabel('Position [mm]');
+#+end_src
+
+#+NAME: fig:ty_position_time
+#+HEADER: :tangle no :exports results :results value raw replace :noweb yes
+#+begin_src matlab :var filepath="figs/ty_position_time.pdf" :var figsize="wide-normal" :post pdf2svg(file=*this*, ext="png")
+  <<plt-matlab>>
+#+end_src
+
+#+NAME: fig:ty_position_time
+#+CAPTION: Y position of the translation stage measured by the encoders
+#+RESULTS: fig:ty_position_time
+[[file:figs/ty_position_time.png]]
+
+#+begin_src matlab :exports none :tangle no
+  xlim([0, 1]);
+#+end_src
+
+#+NAME: fig:ty_position_time_zoom
+#+HEADER: :tangle no :exports results :results value raw replace :noweb yes
+#+begin_src matlab :var filepath="figs/ty_position_time_zoom.pdf" :var figsize="wide-normal" :post pdf2svg(file=*this*, ext="png")
+  <<plt-matlab>>
+#+end_src
+
+#+NAME: fig:ty_position_time_zoom
+#+CAPTION: Y position of the translation stage measured by the encoders - Zoom
+#+RESULTS: fig:ty_position_time_zoom
+[[file:figs/ty_position_time_zoom.png]]
+
+We also plot the current as function of the time on figure [[fig:current_time]].
+
+#+begin_src matlab
+  figure;
+  hold on;
+  plot(data(:, 1), data(:, 3));
+  hold off;
+  xlim([0, 5]); ylim([-10, 10]);
+  xlabel('Time [s]'); ylabel('Current [A]');
+#+end_src
+
+#+NAME: fig:current_time
+#+HEADER: :tangle no :exports results :results value raw replace :noweb yes
+#+begin_src matlab :var filepath="figs/current_time.pdf" :var figsize="wide-normal" :post pdf2svg(file=*this*, ext="png")
+  <<plt-matlab>>
+#+end_src
+
+#+NAME: fig:current_time
+#+CAPTION: Current going through the actuator of the translation stage
+#+RESULTS: fig:current_time
+[[file:figs/current_time.png]]
+
+#+begin_src matlab :exports none :tangle no
+  xlim([0, 1]);
+#+end_src
+
+#+NAME: fig:current_time_zoom
+#+HEADER: :tangle no :exports results :results value raw replace :noweb yes
+#+begin_src matlab :var filepath="figs/current_time_zoom.pdf" :var figsize="wide-normal" :post pdf2svg(file=*this*, ext="png")
+  <<plt-matlab>>
+#+end_src
+
+#+NAME: fig:current_time_zoom
+#+CAPTION: Current going through the actuator of the translation stage - Zoom
+#+RESULTS: fig:current_time_zoom
+[[file:figs/current_time_zoom.png]]
+
+** Conclusion
+#+begin_important
+  - The acquisition is done using the Speedgoat as well as using ELMO. The two acquisition are *not* synchronize
+  - The value of the translation stage encoder can also be read with the speedgoat, this could permit to synchronize the measurements
+#+end_important

disturbance-ty/matlab/disturbance_ty.m

@@ -0,0 +1,275 @@
+%% Clear Workspace and Close figures
+clear; close all; clc;
+
+%% Intialize Laplace variable
+s = zpk('s');
+
+% Load data
+
+z_ty = load('mat/data_040.mat', 'data'); z_ty = z_ty.data;
+e_ty = load('mat/data_041.mat', 'data'); e_ty = e_ty.data;
+e_of = load('mat/data_042.mat', 'data'); e_of = e_of.data;
+
+% Time domain plots
+
+figure;
+hold on;
+plot(z_ty(:, 3), z_ty(:, 1), 'DisplayName', 'Marble - Z');
+plot(z_ty(:, 3), z_ty(:, 2), 'DisplayName', 'Sample - Z');
+hold off;
+xlabel('Time [s]'); ylabel('Voltage [V]');
+xlim([0, 100]); ylim([-5, 5]);
+legend('Location', 'northeast');
+
+
+
+% #+NAME: fig:ty_z_time
+% #+CAPTION: Z motion of the sample and marble when scanning with the translation stage
+% #+RESULTS: fig:ty_z_time
+% [[file:figs/ty_z_time.png]]
+
+
+xlim([0, 1])
+
+
+
+% #+NAME: fig:ty_z_time_zoom
+% #+CAPTION: Z motion of the sample and marble when scanning with the translation stage - Zoom
+% #+RESULTS: fig:ty_z_time_zoom
+% [[file:figs/ty_z_time_zoom.png]]
+
+
+
+figure;
+hold on;
+plot(e_ty(:, 3), e_ty(:, 1), 'DisplayName', 'Marble - X');
+plot(e_ty(:, 3), e_ty(:, 2), 'DisplayName', 'Sample - X');
+hold off;
+xlabel('Time [s]'); ylabel('Voltage [V]');
+xlim([0, 100]); ylim([-10, 10]);
+legend('Location', 'northeast');
+
+
+
+% #+NAME: fig:ty_e_time
+% #+CAPTION: Motion of the sample and marble in the east direction when scanning with the translation stage
+% #+RESULTS: fig:ty_e_time
+% [[file:figs/ty_e_time.png]]
+
+
+xlim([0, 1])
+
+% Frequency Domain analysis
+% We first compute some parameters that will be used for the PSD computation.
+
+dt = z_ty(2, 3)-z_ty(1, 3);
+
+Fs = 1/dt; % [Hz]
+
+win = hanning(ceil(10*Fs));
+
+
+
+% Then we compute the Power Spectral Density using =pwelch= function.
+
+% First for the geophone located on the marble
+
+[pxz_ty_m, f] = pwelch(z_ty(:, 1), win, [], [], Fs);
+[pxe_ty_m, ~] = pwelch(e_ty(:, 1), win, [], [], Fs);
+[pxe_of_m, ~] = pwelch(e_of(:, 1), win, [], [], Fs);
+
+
+
+% And for the geophone located at the sample position.
+
+[pxz_ty_s, f] = pwelch(z_ty(:, 2), win, [], [], Fs);
+[pxe_ty_s, ~] = pwelch(e_ty(:, 2), win, [], [], Fs);
+[pxe_of_s, ~] = pwelch(e_of(:, 2), win, [], [], Fs);
+
+
+
+% And we plot the ASD of the measured signals:
+% - figure [[fig:asd_east_marble]] compares the marble motion in the east direction when scanning and when Ty is OFF
+% - figure [[fig:asd_east_sample]] compares the sample motion in the east direction when scanning and when Ty is OFF
+% - figure [[fig:asd_z_direction]] shows the marble and sample motion in the Z direction when scanning with the translation stage
+
+
+figure;
+hold on;
+plot(f, sqrt(pxe_ty_m), 'DisplayName', 'Ty 1Hz - Marble - X');
+plot(f, sqrt(pxe_of_m), 'DisplayName', 'Ty OFF - Marble - X');
+hold off;
+set(gca, 'xscale', 'log');
+set(gca, 'yscale', 'log');
+xlabel('Frequency [Hz]'); ylabel('ASD of the measured Voltage $\left[\frac{V}{\sqrt{Hz}}\right]$')
+legend('Location', 'northwest');
+xlim([0.1, 500]); ylim([1e-5, 1e1]);
+
+
+
+% #+NAME: fig:asd_east_marble
+% #+CAPTION: Amplitude spectral density of the measure voltage corresponding to the geophone in the east direction located on the marble when the translation stage is OFF and when it is scanning at 1Hz
+% #+RESULTS: fig:asd_east_marble
+% [[file:figs/asd_east_marble.png]]
+
+
+
+figure;
+hold on;
+plot(f, sqrt(pxe_ty_s), 'DisplayName', 'Ty 1Hz - Sample - X');
+plot(f, sqrt(pxe_of_s), 'DisplayName', 'Ty OFF - Sample - X');
+hold off;
+set(gca, 'xscale', 'log');
+set(gca, 'yscale', 'log');
+xlabel('Frequency [Hz]'); ylabel('ASD of the measured Voltage $\left[\frac{V}{\sqrt{Hz}}\right]$')
+legend('Location', 'northwest');
+xlim([0.1, 500]); ylim([1e-5, 1e1]);
+
+
+
+% #+NAME: fig:asd_east_sample
+% #+CAPTION: Amplitude spectral density of the measure voltage corresponding to the geophone in the east direction located at the sample location when the translation stage is OFF and when it is scanning at 1Hz
+% #+RESULTS: fig:asd_east_sample
+% [[file:figs/asd_east_sample.png]]
+
+
+
+figure;
+hold on;
+plot(f, sqrt(pxz_ty_m), 'DisplayName', 'Ty 1Hz - Marble - Z');
+plot(f, sqrt(pxz_ty_s), 'DisplayName', 'Ty 1Hz - Sample - Z');
+hold off;
+set(gca, 'xscale', 'log');
+set(gca, 'yscale', 'log');
+xlabel('Frequency [Hz]'); ylabel('ASD of the measured Voltage $\left[\frac{V}{\sqrt{Hz}}\right]$')
+legend('Location', 'northwest');
+xlim([0.1, 500]); ylim([1e-5, 1e1]);
+
+% Transfer function from marble motion in the East direction to sample motion in the East direction
+% Let's compute the transfer function for the marble motion in the east direction to the sample motion in the east direction.
+
+% We first plot the time domain motions when every stage is off (figure [[fig:east_marble_sample]]).
+
+
+figure;
+hold on;
+plot(e_of(:, 3), e_of(:, 2), 'DisplayName', 'Sample - X');
+plot(e_of(:, 3), e_of(:, 1), 'DisplayName', 'Marble - X');
+hold off;
+xlabel('Time [s]'); ylabel('Voltage [V]');
+xlim([0, 100]); ylim([-1, 1]);
+legend('Location', 'northeast');
+
+
+
+% #+NAME: fig:east_marble_sample
+% #+CAPTION: East motion of the marble and sample when all the stages are OFF
+% #+RESULTS: fig:east_marble_sample
+% [[file:figs/east_marble_sample.png]]
+
+
+% We then compute the transfer function using =tfestimate=.
+
+dt = e_of(2, 3)-e_of(1, 3);
+Fs = 1/dt; % [Hz]
+win = hanning(ceil(10*Fs));
+
+[T, f] = tfestimate(e_of(:, 1), e_of(:, 2), win, [], [], Fs);
+
+
+
+
+% The result is shown on figure [[fig:tf_east_marble_sample]].
+
+figure;
+ax1 = subplot(2, 1, 1);
+hold on;
+plot(f, abs(T));
+hold off;
+set(gca, 'xscale', 'log'); set(gca, 'yscale', 'log');
+set(gca, 'XTickLabel',[]);
+ylabel('Magnitude');
+
+ax2 = subplot(2, 1, 2);
+hold on;
+plot(f, mod(180+180/pi*phase(T), 360)-180);
+hold off;
+set(gca, 'xscale', 'log');
+ylim([-180, 180]);
+yticks([-180, -90, 0, 90, 180]);
+xlabel('Frequency [Hz]'); ylabel('Phase [deg]');
+
+linkaxes([ax1,ax2],'x');
+xlim([10, 100]);
+
+
+
+% #+RESULTS:
+% #+begin_example
+%      1	Elmo txt chart ver 2.0
+%      2
+%      3	[File Properties]
+%      4	Creation Time,2019-05-13 05:11:45
+%      5	Last Updated,2019-05-13 05:11:45
+%      6	Resolution,0.001
+%      7	Sampling Time,5E-05
+%      8	Recording Time,5.461
+%      9
+%     10	[Chart Properties]
+%     11	No.,Name,X Linear,X No.
+%     12	1,Chart #1,True,0
+%     13	2,Chart #2,True,0
+%     14
+%     15	[Chart Data]
+%     16	Display No.,X No.,Y No.,X Unit,Y Unit,Color,Style,Width
+%     17	1,1,2,sec,N/A,ff0000ff,Solid,TwoPoint
+%     18	2,1,3,sec,N/A,ff0000ff,Solid,TwoPoint
+%     19	2,1,4,sec,N/A,ff007f00,Solid,TwoPoint
+%     20
+%     21	[Signal Names]
+%     22	1,Time (sec)
+%     23	2,Position [cnt]
+%     24	3,Current Command [A]
+%     25	4,Total Current Command [A]
+%     26
+%     27	[Signals Data Group 1]
+%     28	1,2,3,4,
+%     29	0,1110769,-0.320872406596209,-0.320872406596209,
+%     30	0.001,1108743,-0.319658428261391,-0.319658428261391,
+% #+end_example
+
+% The real data starts at line 29.
+% We then load this =cvs= file starting at line 29.
+
+
+data = csvread("mat/sin_elmo.csv", 29, 0);
+
+% Time domain data
+% We plot the position of the translation stage measured by the encoders.
+% There is 200000 encoder count for each mm, we then divide by 200000 to obtain mm.
+% The result is shown on figure [[fig:ty_position_time]].
+
+
+figure;
+hold on;
+plot(data(:, 1), data(:, 2)/200000);
+hold off;
+xlim([0, 5]);
+xlabel('Time [s]'); ylabel('Position [mm]');
+
+
+
+% #+NAME: fig:ty_position_time_zoom
+% #+CAPTION: Y position of the translation stage measured by the encoders - Zoom
+% #+RESULTS: fig:ty_position_time_zoom
+% [[file:figs/ty_position_time_zoom.png]]
+
+% We also plot the current as function of the time on figure [[fig:current_time]].
+
+
+figure;
+hold on;
+plot(data(:, 1), data(:, 3));
+hold off;
+xlim([0, 5]); ylim([-10, 10]);
+xlabel('Time [s]'); ylabel('Current [A]');

index.org

@@ -14,6 +14,8 @@
 This web-page gathers all the measurements done on the ID31 Micro Station.
 
 * Measurements of the dynamics of the station
+- [[file:dynamical-meas-granite/index.org][Dynamics from floor motion to marble motion]]
+
 ** Measurement 1
 [[file:2017-11-17%20-%20Marc/index.org][Link to the analysis]]
 
@@ -78,6 +80,7 @@ The station is identified again.
 - [[file:ground-motion/index.org][Ground motion measurements]]
 - [[file:static-to-dynamic/index.org][Static guiding errors]]
 - [[file:disturbance-control-system/index.org][Disturbance induced by the control system of each stage]]
+- [[file:disturbance-ty/index.org][Vibrations due to Ty scans]]
 
 ** Noise coming from the control loop of each stage
 [[file:2018-10-15%20-%20Marc/index.org][Link to the analysis]]
@@ -133,6 +136,7 @@ The goal is to estimate all the error motions induced by the Spindle
 - [[file:disturbance-measurement/index.org][Disturbance Measurement]]
 - [[file:slip-ring-test/index.org][Slip Ring - Noise measurement]]
 - [[file:static-measurements/index.org][Control System Measurement]]
+
 * Ressources
 - [[file:actuators-sensors/index.org][Actuators and Sensors]]
 - [[file:equipment/equipment.org][Equipment used for the measurements]]