From 0812815cca56b1b6bed7fe0f4628512228b7aa87 Mon Sep 17 00:00:00 2001
From: Thomas Dehaeze Table of Contents
-
-The sources of perturbations are: +The sources of perturbations are (schematically shown in figure 1):
-Because we cannot measure directly the perturbation forces, we have the measure the effect of those perturbations on the system (in terms of velocity for instance using geophones) and then, using a model, compute the forces that induced such velocity. +Because we cannot measure directly the perturbation forces, we have the measure the effect of those perturbations on the system (in terms of velocity for instance using geophones, \(D\) on figure 1) and then, using a model, compute the forces that induced such velocity.
+ + ++
+Figure 1: Schematic of the Micro Station and the sources of disturbance
+This file is divided in the following sections:
- + The PSD of the relative velocity between the hexapod and the marble in \([(m/s)^2/Hz]\) are loaded for the following sources of disturbance:
-The Power Spectral Density of the relative motion/velocity of the hexapod with respect to the granite are shown in figures 4 and 5. +The Power Spectral Density of the relative motion/velocity of the hexapod with respect to the granite are shown in figures 5 and 6.
-The Cumulative Amplitude Spectrum of the relative motion is shown in figure 6. +The Cumulative Amplitude Spectrum of the relative motion is shown in figure 7.
--
Figure 4: Amplitude Spectral Density of the relative velocity of the hexapod with respect to the granite due to different sources of perturbation (png, pdf)
+Figure 5: Amplitude Spectral Density of the relative velocity of the hexapod with respect to the granite due to different sources of perturbation (png, pdf)
-
Figure 5: Amplitude Spectral Density of the relative displacement of the hexapod with respect to the granite due to different sources of perturbation (png, pdf)
+Figure 6: Amplitude Spectral Density of the relative displacement of the hexapod with respect to the granite due to different sources of perturbation (png, pdf)
-Now, from the extracted transfer functions from the disturbance force to the relative motion of the hexapod with respect to the granite (section 2) and from the measured PSD of the relative motion (section 3), we can compute the PSD of the disturbance force. +Now, from the extracted transfer functions from the disturbance force to the relative motion of the hexapod with respect to the granite (section 2) and from the measured PSD of the relative motion (section 3), we can compute the PSD of the disturbance force.
@@ -498,24 +507,24 @@ We should verify that this is coherent with the measurements.
-
The PSD of the disturbance force are now saved for further noise budgeting when control is applied (the mat file is accessible here).
@@ -536,7 +545,7 @@ save(
Created: 2019-11-04 lun. 15:53 Created: 2019-11-04 lun. 15:56
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