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Gyro Control Unit (GCU)

User’s Guide

MaxMetrix, Scottsdale, AZ

PN: GCU-2K1-UG:RevI.2 NGC

4.1.5 NOTCH FILTER ADJUSTMENTS

WARNING!!!

Adjusting the notch filter parameters should only be accomplished by a trained operator or someone

familiar with the GCU unit and the gyroscope. Changing the notch filter placements, steepness, and/or

damping coefficients can cause the system to be unstable.

The GCU unit incorporates five independent programmable digital filters to remove spectral line and noise

components in the gyro signal. This is accomplished by utilizing a cascade of bilinear-quad IIR filters.

The bi-quads are programmed for the type of filter, the frequency, and the bandwidth, respectively.

Figure 23 Notch Filter Coefficient Adjustments

4.1.5.1 WRITE TO DSP

This command stores the filter parameters in the GCU RAM. The Filter Parameters are read at power on

and sent to the DSP.

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Data Connect DSP19.2 Guida Utente Pagina 29