Title :
Dynamic error mechanism analysis of HRG
Author :
Qi, Jiayi ; Chen, Xue ; Ren, Shunqing ; Wang, Changhong
Author_Institution :
Space Control & Inertial Technol. Res. Center, Harbin Inst. of Technol., Harbin
Abstract :
The strains of an arbitrary point on the resonator of the hemispherical resonator gyro are deduced under Kirchhoff-Lyav hypothesis. The force equilibrium equations of the thin shell element are established on the basis of the calculated strains. When the gyro is subjected to three-axis angular rates and angular accelerations, the inertia force is calculated and the border motion equations of the hemispherical resonator are established, the solution of the dynamic equation is gained using Bubonov-Galerkin method. In the end, the dynamical error model of gyro is attained, the influence of angular rate and angular acceleration on the accuracy of the gyro is analyzed when the gyro bearing three-axis angular rates and angular accelerations.
Keywords :
Galerkin method; gyroscopes; Bubonov-Galerkin method; Kirchhoff-Lyav hypothesis; angular accelerations; border motion equations; dynamic equation; dynamic error mechanism analysis; dynamical error model; force equilibrium equations; gyro bearing; hemispherical resonator gyro; inertia force; thin shell element; three-axis angular rates; Costs; Error analysis; Gravity; Orbital robotics; Propulsion; Rockets; Satellites; Space missions; Space technology; Space vehicles;
Conference_Titel :
Systems and Control in Aerospace and Astronautics, 2008. ISSCAA 2008. 2nd International Symposium on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4244-3908-9
Electronic_ISBN :
978-1-4244-2386-6
DOI :
10.1109/ISSCAA.2008.4776369
