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Thomas Dehaeze 2025-04-15 12:31:46 +02:00
parent 8c75c203db
commit f7031da843
2 changed files with 5 additions and 16 deletions

15
nass-instrumentation.bib

@ -10,15 +10,6 @@
@techreport{spengen16_high_voltag_amplif,
author = {W. Merlijn van Spengen},
institution = {Falco Systems},
title = {High Voltage Amplifiers: How fast are they really?},
year = 2016,
}
@techreport{spengen20_high_voltag_amplif,
author = {W. Merlijn van Spengen},
institution = {Falco Systems},
@ -47,7 +38,6 @@
pages = {3751-3768},
doi = {10.23919/acc55779.2023.10156102},
url = {http://dx.doi.org/10.23919/ACC55779.2023.10156102},
DATE_ADDED = {Tue Dec 17 10:56:35 2024},
month = 5,
}
@ -90,16 +80,15 @@
@article{hauser91_princ_overs_conver,
@article{hauser91_princ_overs_d_conver,
author = {Max Hauser},
title = {Principles of Oversampling A/d Conversion},
title = {Principles of Oversampling {A/D} Conversion},
journal = {Journal of Audio Engineering Society},
year = 1991,
}
@book{reza06_piezoel_trans_vibrat_contr_dampin,
author = {Reza, Moheimani and Andrew, Fleming},
title = {Piezoelectric Transducers for Vibration Control and

6
nass-instrumentation.org

@ -1014,10 +1014,10 @@ The amplitude spectral density of the recorded values was computed and is presen
The ADC noise exhibits characteristics of white noise with an amplitude spectral density of $5.6\,\mu V/\sqrt{\text{Hz}}$ (equivalent to $0.4\,\text{mV RMS}$), which satisfies the established specifications.
All ADC channels demonstrated similar performance, so only one channel's noise profile is shown.
If necessary, oversampling can be applied to further reduce the noise cite:lab13_improv_adc.
If necessary, oversampling can be applied to further reduce the noise [[cite:&lab13_improv_adc]].
To gain $w$ additional bits of resolution, the oversampling frequency $f_{os}$ should be set to $f_{os} = 4^w \cdot F_s$.
Given that the ADC can operate at 200kSPS while the real-time controller runs at 10kSPS, an oversampling factor of 16 can be employed to gain approximately two additional bits of resolution (reducing noise by a factor of 4).
This approach is effective because the noise approximates white noise and its amplitude exceeds 1 LSB (0.3 mV) [[cite:hauser91_princ_overs_conver]].
This approach is effective because the noise approximates white noise and its amplitude exceeds 1 LSB (0.3 mV) [[cite:&hauser91_princ_overs_d_conver]].
#+begin_src matlab
%% ADC noise
@ -1178,7 +1178,7 @@ exportFig('figs/detail_instrumentation_step_response_force_sensor.pdf', 'width',
#+end_src
#+name: fig:detail_instrumentation_force_sensor
#+caption: Electrical schematic of the ADC measuring the piezoelectric force sensor (\subref{fig:detail_instrumentation_force_sensor_adc}), adapted from cite:reza06_piezoel_trans_vibrat_contr_dampin. Measured voltage $V_s$ while step voltages are generated for the actuator stacks (\subref{fig:detail_instrumentation_step_response_force_sensor}).
#+caption: Electrical schematic of the ADC measuring the piezoelectric force sensor (\subref{fig:detail_instrumentation_force_sensor_adc}), adapted from [[cite:&reza06_piezoel_trans_vibrat_contr_dampin]]. Measured voltage $V_s$ while step voltages are generated for the actuator stacks (\subref{fig:detail_instrumentation_step_response_force_sensor}).
#+attr_latex: :options [htbp]
#+begin_figure
#+attr_latex: :caption \subcaption{\label{fig:detail_instrumentation_force_sensor_adc}Electrical Schematic}