Merge 3 modes into one figure
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figs/apa_mode_shapes.gif
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@ -520,25 +520,15 @@ data2orgtable(1e6*apa300ml_stroke', {'APA 1', 'APA 2', 'APA 3', 'APA 4', 'APA 5'
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<<sec:spurious_resonances>>
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<<sec:spurious_resonances>>
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*** Introduction
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*** Introduction
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Three main resonances are foreseen to be problematic for the control of the APA300ML:
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Three main resonances are foreseen to be problematic for the control of the APA300ML (Figure [[fig:apa_mode_shapes]]):
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- Mode in X-bending at 189Hz (Figure [[fig:mode_bending_x]])
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- Mode in X-bending at 189Hz
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- Mode in Y-bending at 285Hz (Figure [[fig:mode_bending_y]])
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- Mode in Y-bending at 285Hz
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- Mode in Z-torsion at 400Hz (Figure [[fig:mode_torsion_z]])
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- Mode in Z-torsion at 400Hz
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#+name: fig:mode_bending_x
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#+name: fig:apa_mode_shapes
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#+caption: X-bending mode (189Hz)
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#+caption: Spurious resonances. a) X-bending mode at 189Hz. b) Y-bending mode at 285Hz. c) Z-torsion mode at 400Hz
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#+attr_latex: :width 0.9\linewidth
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#+attr_latex: :width \linewidth
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[[file:figs/mode_bending_x.gif]]
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[[file:figs/apa_mode_shapes.gif]]
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#+name: fig:mode_bending_y
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#+caption: Y-bending mode (285Hz)
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#+attr_latex: :width 0.9\linewidth
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[[file:figs/mode_bending_y.gif]]
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#+name: fig:mode_torsion_z
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#+caption: Z-torsion mode (400Hz)
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#+attr_latex: :width 0.9\linewidth
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[[file:figs/mode_torsion_z.gif]]
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These modes are present when flexible joints are fixed to the ends of the APA300ML.
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These modes are present when flexible joints are fixed to the ends of the APA300ML.
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@ -2532,25 +2522,15 @@ exportFig('figs/strut_1_spurious_resonances.pdf', 'width', 'wide', 'height', 'ta
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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 (Figure [[fig:apa_mode_shapes_bis]]):
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- X-bending mode at around 190Hz (Figure [[fig:mode_bending_x_bis]])
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- Mode in X-bending at 189Hz
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- Y-bending mode at around 290Hz (Figure [[fig:mode_bending_y_bis]])
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- Mode in Y-bending at 285Hz
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- Z-torsion mode at around 400Hz (Figure [[fig:mode_torsion_z_bis]])
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- Mode in Z-torsion at 400Hz
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#+name: fig:mode_bending_x_bis
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#+name: fig:apa_mode_shapes_bis
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#+caption: X-bending mode (189Hz)
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#+caption: Spurious resonances. a) X-bending mode at 189Hz. b) Y-bending mode at 285Hz. c) Z-torsion mode at 400Hz
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#+attr_latex: :width 0.9\linewidth
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#+attr_latex: :width \linewidth
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[[file:figs/mode_bending_x.gif]]
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[[file:figs/apa_mode_shapes.gif]]
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#+name: fig:mode_bending_y_bis
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#+caption: Y-bending mode (285Hz)
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#+attr_latex: :width 0.9\linewidth
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[[file:figs/mode_bending_y.gif]]
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#+name: fig:mode_torsion_z_bis
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#+caption: Z-torsion mode (400Hz)
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#+attr_latex: :width 0.9\linewidth
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[[file:figs/mode_torsion_z.gif]]
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#+begin_important
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#+begin_important
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The resonances are indeed due to limited stiffness of the APA.
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The resonances are indeed due to limited stiffness of the APA.
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