Digital Rebalance Loop Design for DTG Based on SOPC
Jianhui Zeng · Journal of Projectiles.Rockets.Missiles and Guidance · 2008
A digital rebalance loop based on FPGA was designed according to the digital rebalance loop of dynamically tuned gyroscope(DTG)and the decoupling control algorithm.The control matrix and output decoupling matrix were obtained by studying the DTG coupling condition and using the decoupling method of diagonal matrix.The mathematic model of the digital rebalance loop was built.SOPC was used as control and calculation core unit,while hardware circuits were used for signal amplification,demodulation and torque exertion.The decoupling control and control algorithm were carried out by SOPC software.The north-seeking precision of north-seeker based on digital rebalance loop can meet the requirement in the experiment.With static experiment on test table,the validity of the design was verified.