tdehaeze/nass-micro-station-measurements
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nass-micro-station-measurem.../2017-11-17 - Marc/scripts/data.org

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Measurements made by Marc Lessourd on the 17th of November 2017 - Matlab

Load the data 

  load('./raw_data/id31_microstation_2017_11_17_coh.mat',...
       'coh_hexa_x',...
       'coh_hexa_y',...
       'coh_hexa_z',...
       'coh_marble_x',...
       'coh_marble_y',...
       'coh_marble_z');
  load('./raw_data/id31_microstation_2017_11_17_frf.mat',...
       'freq_frf',...
       'frf_hexa_x',...
       'frf_hexa_y',...
       'frf_hexa_z',...
       'frf_marble_x',...
       'frf_marble_y',...
       'frf_marble_z');

Measurement is in V?

  accel_sensitivity = 0.102; % [V/(m/s2)]
  w = j*2*pi*freq_frf;

  frf_hexa_x =  1/accel_sensitivity*frf_hexa_x./(w.^2);
  frf_hexa_y = -1/accel_sensitivity*frf_hexa_y./(w.^2);
  frf_hexa_z = -1/accel_sensitivity*frf_hexa_z./(w.^2);

  frf_marble_x =  1/accel_sensitivity*frf_marble_x./(w.^2);
  frf_marble_y =  1/accel_sensitivity*frf_marble_y./(w.^2);
  frf_marble_z = -1/accel_sensitivity*frf_marble_z./(w.^2);

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