Measurement Error Analysis Of Hemisphere Resonant Gyro

The gyroscope ,an important inertial component ,is widely applied in navigation, aerospace, aviation, weapons and other civil fields.The test principle of hemisphere gyro is based on the ideal hemisphere harmonic oscillator,of which the vibration can explain it.But actually the harmonic oscillator is always exist various kinds of defects.Such as, the inequality of quality and damping,the slow changing of damping, the defects of incentive and signal acquisition system etc.All of those defects lead to the error of the hemisphere gyros completed.however,when the error appears,it necessary for us to analysis the causes and find a way to have a error compensation in the rear circuit testing system.Beginning from the basic structure and working principle, this article focuses on the analysis of the signal detecting .The closed-loop detecting principle of hemisphere harmonic oscillator (HRG) is introduced and simulated by using finite element software ABAQUS.Then,the dynamic equations are establisheed and the theoretical solution is worked out by using average method to demonstrate the principle.Finally, the measurement error of hemisphere harmonic oscillator (HRG) caused by initial exciting is worked out to provide a basis for actual gyro system to eliminate the influence of this factors.