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diff --git a/inkscape/rotating_xy_platform.svg b/inkscape/system_iff.svg
similarity index 86%
rename from inkscape/rotating_xy_platform.svg
rename to inkscape/system_iff.svg
index c632df0..a9d3d08 100644
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diff --git a/inkscape/system_parallel_springs.pdf b/inkscape/system_parallel_springs.pdf
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diff --git a/inkscape/rotating_xy_platform_springs.svg b/inkscape/system_parallel_springs.svg
similarity index 91%
rename from inkscape/rotating_xy_platform_springs.svg
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diff --git a/matlab/index.org b/matlab/index.org
index 2aab64c..95aafd7 100644
--- a/matlab/index.org
+++ b/matlab/index.org
@@ -2475,16 +2475,6 @@ The obtained damping ratio and control are shown below.
   Kiff = opt_gain_iff/(wi + s)*tf(eye(2));
 #+end_src
 
-#+begin_src matlab
-  %% Name of the Simulink File
-  mdl = 'rotating_frame';
-
-  %% Input/Output definition
-  clear io; io_i = 1;
-  io(io_i) = linio([mdl, '/dw'], 1, 'input');  io_i = io_i + 1;
-  io(io_i) = linio([mdl, '/Meas'], 1, 'output');  io_i = io_i + 1;
-#+end_src
-
 #+begin_src matlab
   Tiff = linearize(mdl, io, 0);
 
@@ -2507,16 +2497,6 @@ The obtained damping ratio and control are shown below.
   Kdvf = tf(zeros(2));
 #+end_src
 
-#+begin_src matlab
-  %% Name of the Simulink File
-  mdl = 'rotating_frame';
-
-  %% Input/Output definition
-  clear io; io_i = 1;
-  io(io_i) = linio([mdl, '/dw'], 1, 'input');  io_i = io_i + 1;
-  io(io_i) = linio([mdl, '/Meas'], 1, 'output');  io_i = io_i + 1;
-#+end_src
-
 #+begin_src matlab
   Tiff_kp = linearize(mdl, io, 0);
 
@@ -2537,16 +2517,6 @@ The obtained damping ratio and control are shown below.
   Kdvf = opt_gain_kp*tf(eye(2));
 #+end_src
 
-#+begin_src matlab
-  %% Name of the Simulink File
-  mdl = 'rotating_frame';
-
-  %% Input/Output definition
-  clear io; io_i = 1;
-  io(io_i) = linio([mdl, '/dw'], 1, 'input');  io_i = io_i + 1;
-  io(io_i) = linio([mdl, '/Meas'], 1, 'output');  io_i = io_i + 1;
-#+end_src
-
 #+begin_src matlab
   Tdvf = linearize(mdl, io, 0);