I'm implementing the IP control with the FLDACCs. I tuned the coefficients for each FLDACC relative to ACC (geophone). Plot 1 shows the spectra of each ACC and FLDACC. Plot 2 shows the spectra of each virtual sensor (L, T, and Y). I measured the transfer functions from each virtual actuator to each virtual sensor (Plots 3, 4, and 5). The gains of the ACCs and FLDACCs are increasing toward DC below 70mHz for L and 50mHz for T.
I tuned the servo control for the FLDACCs. The UGF was changed from 10Hz to 1Hz to avoid the induced noise in the ACCs (geophons). Plot 1 shows the spectra of each FLDACC and ACC with the 10Hz UGF. Plot 2 shows the spectra with the 1Hz UGF. The noise floor of the ACCs was reduced.
