User`s guide

Gyro Control Unit (GCU)
User’s Guide
5
MaxMetrix, Scottsdale, AZ
PN: GCU-2K1-UG:RevI.2 NGC
1 SCOPE
This manual describes the use and setup of the G-2000 Gyro Control Unit (GCU) product, Model No:
GCU2K1.
1.1 OVERVIEW
The GCU2K1 gyro control unit is designed to provide digital control for the Northrop Grumman Company,
G-2000 dual rate sensor products.
Figure 1 GCU2K1, Gyro Control Unit (GCU)
The GCU digital control unit is based on the Texas Instrument’s TMS320VC33-150 Floating-Point Digital
Signal Processing unit. This GCU device is responsible for calculating the complex compensation, digital
low pass and notch filters, and control response. The GCU also provides the necessary stimulus and data
collection to create the bode plots to determine the overall gyro performance. Tuning parameters are stored
in the GCU in its on-board EEPROM and sent to the DSP once power in applied. The DSP closes the gyro
control loop at over 20,000 samples per second allowing the gyro to achieve very high fidelity.