The research of the influence of gyroscope power stability on the north-finding result is studied

in order to improve the gyroscope north-finding precision.A digital AC gyroscope power system is designed based on the digital signal processor（DSP）microprocessor of TMS320F2407A.Without considering other interfere factors

the theoretic model and the computing equation of the stability influence of gyroscope motor rotation rate on the north-finding result is deducted.And the output voltage and the frequency effect on the north-seeking result.Then the related equation among the north-finding result and the output voltage and frequency is deduced.The experimental result show that the biggest deviation error of the north-finding result is 12″when the power output voltage changes between 34V and 36V;and the deviation error is bigger than 1′when the power output voltage is smaller than 34V.The result matches the theoretical calculation result

and shows that the characteristics of the digital gyroscope power satisfy the gyroscope demand.