Add plot without protecting material
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index.org
31
index.org
@ -232,6 +232,15 @@ The computed ASD of the two measurements are combined in Figure [[fig:psd_combin
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#+caption: Aluminium tube used to protect the beam path from disturbances
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[[file:figs/IMG-7864.JPG]]
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** Matlab Init :noexport:ignore:
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#+begin_src matlab :tangle no :exports none :results silent :noweb yes :var current_dir=(file-name-directory buffer-file-name)
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<<matlab-dir>>
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#+end_src
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#+begin_src matlab :exports none :results silent :noweb yes
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<<matlab-init>>
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#+end_src
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** Aluminium Tube and Bubble Sheet
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#+begin_src matlab
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load('./mat/long_test_plastic.mat');
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@ -276,6 +285,26 @@ The time domain measurement is shown in Figure [[fig:short_meas_time_domain]].
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#+end_src
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** Nothing
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#+begin_src matlab
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load('./mat/long_test_without_material.mat');
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Ts = 1e-4; % [s]
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#+end_src
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#+begin_src matlab
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x = detrend(x, 0);
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#+end_src
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The time domain measurement is shown in Figure [[fig:short_meas_time_domain]].
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#+begin_src matlab :exports none
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figure;
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plot(t, 1e9*x)
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xlabel('Time [s]'); ylabel('Displacement [nm]');
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#+end_src
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#+begin_src matlab
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win = hann(ceil(length(x)/10));
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[p_3, f_3] = pwelch(x, win, [], [], 1/Ts);
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#+end_src
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** Comparison
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#+begin_src matlab :exports none
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@ -285,6 +314,8 @@ The time domain measurement is shown in Figure [[fig:short_meas_time_domain]].
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'DisplayName', 'Alunimium + Bubble');
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plot(f_2(8:end), sqrt(p_2(8:end)), '-', ...
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'DisplayName', 'Aluminium');
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plot(f_3(8:end), sqrt(p_3(8:end)), '-', ...
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'DisplayName', 'nothing');
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hold off;
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set(gca, 'Xscale', 'log'); set(gca, 'Yscale', 'log');
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ylabel('ASD [$m/\sqrt{Hz}$]'); xlabel('Frequency [Hz]');
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