Add new test mat files

This commit is contained in:
Thomas Dehaeze 2020-11-03 09:29:34 +01:00
parent fbdab0e5f0
commit 34a6a48132
19 changed files with 15 additions and 10 deletions

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@ -46,6 +46,7 @@
#+name: fig:test-bench-picture
#+caption: Picture of the test bench. The Attocube and mirror are covered by a "bubble sheet"
#+ATTR_ORG: :width 600px
[[file:figs/IMG-7865.JPG]]
** Matlab Init :noexport:ignore:
@ -61,13 +62,14 @@
The first measurement was made during ~17 hours with a sampling time of $T_s = 0.1\,s$.
#+begin_src matlab
load('./mat/long_test2.mat', 'x', 't')
load('./mat/long_test_plastic.mat', 'x', 't')
Ts = 0.1; % [s]
#+end_src
#+begin_src matlab :exports none
figure;
plot(t/60/60, 1e9*x)
xlim([0, 17.5]);
xlabel('Time [h]'); ylabel('Displacement [nm]');
#+end_src
@ -85,8 +87,8 @@ Let's fit the data with a step response to a first order low pass filter (Figure
#+begin_src matlab
f = @(b,x) b(1)*(1 - exp(-x/b(2)));
y_cur = x(t < 17*60*60);
t_cur = t(t < 17*60*60);
y_cur = x(t < 17.5*60*60);
t_cur = t(t < 17.5*60*60);
nrmrsd = @(b) norm(y_cur - f(b,t_cur)); % Residual Norm Cost Function
B0 = [400e-9, 2*60*60]; % Choose Appropriate Initial Estimates
@ -99,7 +101,7 @@ The corresponding time constant is (in [h]):
#+end_src
#+RESULTS:
: 2.0576
: 2.0658
#+begin_src matlab :exports none
figure;
@ -107,6 +109,7 @@ The corresponding time constant is (in [h]):
plot(t_cur/60/60, 1e9*y_cur);
plot(t_cur/60/60, 1e9*f(B, t_cur));
hold off;
xlim([0, 17.5])
xlabel('Time [h]'); ylabel('Displacement [nm]');
#+end_src
@ -125,7 +128,7 @@ We only select the data between =t1= and =t2=.
The obtained displacement is shown in Figure [[fig:long_meas_time_domain_zoom]].
#+begin_src matlab
t1 = 11; t2 = 17; % [h]
t1 = 10.5; t2 = 17.5; % [h]
x = x(t > t1*60*60 & t < t2*60*60);
x = x - mean(x);
@ -198,7 +201,7 @@ The time domain measurement is shown in Figure [[fig:short_meas_time_domain]].
The Power Spectral Density of the measured displacement is computed
#+begin_src matlab
win = hann(ceil(length(x)/10));
win = hann(ceil(length(x)/20));
[p_2, f_2] = pwelch(x, win, [], [], 1/Ts);
#+end_src
@ -230,6 +233,7 @@ The computed ASD of the two measurements are combined in Figure [[fig:psd_combin
#+name: fig:picture-test-bench-aluminium-tube
#+caption: Aluminium tube used to protect the beam path from disturbances
#+ATTR_ORG: :width 600px
[[file:figs/IMG-7864.JPG]]
** Matlab Init :noexport:ignore:
@ -243,7 +247,7 @@ The computed ASD of the two measurements are combined in Figure [[fig:psd_combin
** Aluminium Tube and Bubble Sheet
#+begin_src matlab
load('./mat/long_test_plastic.mat');
load('./mat/short_test_plastic.mat');
Ts = 1e-4; % [s]
#+end_src
@ -264,7 +268,7 @@ The computed ASD of the two measurements are combined in Figure [[fig:psd_combin
** Only Aluminium Tube
#+begin_src matlab
load('./mat/long_test_alu_tube.mat');
load('./mat/short_test_alu_tube.mat');
Ts = 1e-4; % [s]
#+end_src
@ -286,7 +290,7 @@ The time domain measurement is shown in Figure [[fig:short_meas_time_domain]].
** Nothing
#+begin_src matlab
load('./mat/long_test_without_material.mat');
load('./mat/short_test_without_material.mat');
Ts = 1e-4; % [s]
#+end_src
@ -319,11 +323,12 @@ The time domain measurement is shown in Figure [[fig:short_meas_time_domain]].
hold off;
set(gca, 'Xscale', 'log'); set(gca, 'Yscale', 'log');
ylabel('ASD [$m/\sqrt{Hz}$]'); xlabel('Frequency [Hz]');
xlim([1e-1, 5e3]);
legend('location', 'northeast');
#+end_src
#+begin_src matlab :tangle no :exports results :results file replace
exportFig('figs/asd_noise_comp_bubble_aluminium.pdf', 'width', 'wide', 'height', 'normal');
exportFig('figs/asd_noise_comp_bubble_aluminium.pdf', 'width', 'wide', 'height', 'tall');
#+end_src
#+name: fig:asd_noise_comp_bubble_aluminium

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mat/short_test_alu_tube.mat Executable file

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mat/short_test_plastic.mat Executable file

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