Rework all the Matlab computation
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@@ -320,7 +320,7 @@ Let's validate the proposed design method of complementary filters with a simple
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- the gain of both filters is equal to $10^{-3}$ away from the merging frequency
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The weighting functions $W_1(s)$ and $W_2(s)$ are designed using eqref:eq:weight_formula.
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The parameters used are summarized in table ref:tab:weights_params and the magnitude of the weighting functions is shown in Fig. ref:fig:hinf_synthesis_results.
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The parameters used are summarized in table ref:tab:weights_params and the magnitude of the weighting functions is shown in Fig. ref:fig:hinf_filters_results.
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#+name: tab:weights_params
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#+caption: Parameters used for $W_1(s)$ and $W_2(s)$
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@@ -334,16 +334,16 @@ The parameters used are summarized in table ref:tab:weights_params and the magni
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| $G_c$ | $0.5$ | $0.5$ |
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| $n$ | $2$ | $3$ |
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The bode plots of the obtained complementary filters are shown in Fig. ref:fig:hinf_synthesis_results and their transfer functions in the Laplace domain are given below.
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The bode plots of the obtained complementary filters are shown in Fig. ref:fig:hinf_filters_results and their transfer functions in the Laplace domain are given below.
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\begin{align*}
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H_1(s) &= \frac{10^{-8} (s+6.6e^9) (s+3450)^2 (s^2 + 49s + 895)}{(s+6.6e^4) (s^2 + 106 s + 3e^3) (s^2 + 72s + 3580)}\\
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H_2(s) &= \frac{(s+6.6e^4) (s+160) (s+4)^3}{(s+6.6e^4) (s^2 + 106 s + 3e^3) (s^2 + 72s + 3580)}
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\end{align*}
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#+name: fig:hinf_synthesis_results
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#+name: fig:hinf_filters_results
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#+caption: Frequency response of the weighting functions and complementary filters obtained using $\mathcal{H}_\infty$ synthesis
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#+attr_latex: :scale 1
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[[file:figs/hinf_synthesis_results.pdf]]
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[[file:figs/hinf_filters_results.pdf]]
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** Synthesis of Three Complementary Filters
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<<sec:hinf_three_comp_filters>>
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@@ -380,13 +380,13 @@ By choosing $H_1(s) \triangleq 1 - H_2(s) - H_3(s)$, the proposed $\mathcal{H}_\
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*** Example of generated complementary filters :ignore:
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An example is given to validate the method where three sensors are used in different frequency bands (up to $\SI{1}{Hz}$, from $1$ to $\SI{10}{Hz}$ and above $\SI{10}{Hz}$ respectively).
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Three weighting functions are designed using eqref:eq:weight_formula and shown by dashed curves in Fig. ref:fig:hinf_three_synthesis_results.
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The bode plots of the obtained complementary filters are shown in Fig. ref:fig:hinf_three_synthesis_results.
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Three weighting functions are designed using eqref:eq:weight_formula and shown by dashed curves in Fig. ref:fig:three_complementary_filters_results.
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The bode plots of the obtained complementary filters are shown in Fig. ref:fig:three_complementary_filters_results.
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#+name: fig:hinf_three_synthesis_results
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#+name: fig:three_complementary_filters_results
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#+caption: Frequency response of the weighting functions and three complementary filters obtained using $\mathcal{H}_\infty$ synthesis
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#+attr_latex: :scale 1
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[[file:figs/hinf_three_synthesis_results.pdf]]
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[[file:figs/three_complementary_filters_results.pdf]]
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* Application: Design of Complementary Filters used in the Active Vibration Isolation System at the LIGO
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<<sec:application_ligo>>
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