Update CSS => bot margin tables

css/custom.css

@@ -9,5 +9,6 @@
 }
 
 table {
-    margin: auto;
+    margin-left: auto;
+    margin-right: auto;
 }

index.org

@@ -2031,28 +2031,34 @@ The simulation is considered to be fairly realistic as the model used has been s
 Table summarizing the nano-hexapod wanted characteristics:
 
 
-- Dimensions (Figure [[fig:nano_hexapod_size]])
+- Dimensions (Figure [[fig:nano_hexapod_size]]):
+  - Maximum Height: 90mm
+  - Diameter of the bottom platform: 300mm
+  - Diameter of the top platform: 200mm
 - Stiffness:
-  - Resonances should be between 5Hz and 50Hz
-  -
+  - Resonances should stay between 5Hz and 50Hz for payload masses up to 50kg
+  - This corresponds to strut stiffnesses of $k \approx 10^5 - 10^6\,[N/m]$
 - Flexible joints:
-  - To be optimized such that the above resonances are in the required range
-  -
+  - Axial Stiffness: $K_a > 10^7\,[N/m]$
+  - Bending Stiffness: $K_b < 50\,[Nm/rad]$
+  - Torsion Stiffness: $K_t < 50\,[Nm/rad]$
   - Required angular stroke: can be estimated with simulations
-- Force
+- Force:
   - Weight: $60\,kg \rightarrow 600\,N \rightarrow 60\,N$ on each actuator
   - Dynamic: few Newtons
 - Estimation of the required stroke:
-  - From simulation (i.e. for disturbance rejection alone), $\pm 5 \mu m$ is good
+  - From simulation (i.e. for disturbance rejection alone), $\pm 5 \mu m$
   - However, the required stroke probably depends on two other factors:
     - Static positioning errors of the stages
     - Maximum tracking errors of the stages (mainly translation stage and tilt stage).
       This is probably more difficult to obtain.
       However, by limiting the acceleration of these stages, we may limit the dynamic tracking errors to acceptable levels
-- Sensors to be included
+  - If the chosen technology allows $\pm 50 \mu m$ that would be safer
+- Sensors to be included:
+  -
 
 #+name: fig:nano_hexapod_size
-#+caption: First implementation of the nano-hexapod / deflector and coolsed sample plate support
+#+caption: First implementation of the nano-hexapod / metrology reflector and sample interface
 [[file:figs/nano_hexapod_size.png]]
 
 ** Sensor Noise introduced by the Metrology
@@ -2074,6 +2080,9 @@ This means that above the suspension mode of the granite (here around 2Hz), the
 
 Sensible to detector motion?
 
+** Micro Station Architecture
+https://tdehaeze.github.io/nass-simscape/alternative-micro-station-architecture.html
+
 ** Others Factors that may limit the performances
 Cable forces?