Output the analysis both to pdf and html
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@ -2558,7 +2558,7 @@ exportFig('figs/strut_1_comp_enc_int.pdf', 'width', 'wide', 'height', 'tall');
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#+end_src
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#+end_src
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#+name: fig:strut_1_comp_enc_int
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#+name: fig:strut_1_comp_enc_int
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#+caption:
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#+caption: Comparison of the transfer functions from excitation voltage $V_a$ to either the encoder $d_e$ or the interferometer $d_a$
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#+RESULTS:
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#+RESULTS:
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[[file:figs/strut_1_comp_enc_int.png]]
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[[file:figs/strut_1_comp_enc_int.png]]
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@ -2581,7 +2581,7 @@ text(290, 4e-6, {'290Hz'},'VerticalAlignment','bottom','HorizontalAlignment','c
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text(376, 1.4e-6,{'376Hz'},'VerticalAlignment','bottom','HorizontalAlignment','center')
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text(376, 1.4e-6,{'376Hz'},'VerticalAlignment','bottom','HorizontalAlignment','center')
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hold off;
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hold off;
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set(gca, 'XScale', 'log'); set(gca, 'YScale', 'log');
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set(gca, 'XScale', 'log'); set(gca, 'YScale', 'log');
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ylabel('Amplitude $d_e/V_a$ [m/V]'); set(gca, 'XTickLabel',[]);
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ylabel('Amplitude $d_e/V_a$ [m/V]'); xlabel('Frequency [Hz]');
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hold off;
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hold off;
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ylim([1e-7, 1e-3]); xlim([10, 2e3]);
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ylim([1e-7, 1e-3]); xlim([10, 2e3]);
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#+end_src
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#+end_src
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@ -2591,16 +2591,16 @@ exportFig('figs/strut_1_spurious_resonances.pdf', 'width', 'wide', 'height', 'ta
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#+end_src
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#+end_src
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#+name: fig:strut_1_spurious_resonances
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#+name: fig:strut_1_spurious_resonances
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#+caption:
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#+caption: Magnitude of the transfer function from excitation voltage $V_a$ to encoder measurement $d_e$. The frequency of the resonances are noted.
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#+RESULTS:
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#+RESULTS:
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[[file:figs/strut_1_spurious_resonances.png]]
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[[file:figs/strut_1_spurious_resonances.png]]
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These resonances correspond to parasitic resonances of the APA itself.
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These resonances correspond to parasitic resonances of the APA itself.
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They are very close to what was estimated using the FEM:
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They are very close to what was estimated using the FEM:
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- X-bending mode at ~190Hz (Figure [[fig:mode_bending_x_bis]])
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- X-bending mode at around 190Hz (Figure [[fig:mode_bending_x_bis]])
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- Y-bending mode at ~290Hz (Figure [[fig:mode_bending_y_bis]])
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- Y-bending mode at around 290Hz (Figure [[fig:mode_bending_y_bis]])
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- Z-torsion mode at ~400Hz (Figure [[fig:mode_torsion_z_bis]])
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- Z-torsion mode at around 400Hz (Figure [[fig:mode_torsion_z_bis]])
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#+name: fig:mode_bending_x_bis
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#+name: fig:mode_bending_x_bis
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#+caption: X-bending mode (189Hz)
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#+caption: X-bending mode (189Hz)
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@ -2943,7 +2943,11 @@ exportFig('figs/struts_frf_dvf_plant_tf.pdf', 'width', 'wide', 'height', 'tall')
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#+RESULTS:
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#+RESULTS:
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[[file:figs/struts_frf_dvf_plant_tf.png]]
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[[file:figs/struts_frf_dvf_plant_tf.png]]
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#+begin_important
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Depending on how the APA are mounted with the flexible joints, the dynamics can change a lot as shown in Figure [[fig:struts_frf_dvf_plant_tf]].
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In the future, a "pin" will be used to better align the APA with the flexible joints.
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We can expect the amplitude of the spurious resonances to decrease.
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#+end_important
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*** FRF Identification - DVF with interferometer
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*** FRF Identification - DVF with interferometer
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In this section, the dynamics from $V_a$ to $d_a$ is identified.
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In this section, the dynamics from $V_a$ to $d_a$ is identified.
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