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半球谐振子的品质因数不均匀性是造成陀螺仪输出误差的一个主要误差源,所以研究在参数激励以及位置激励两种模式下,谐振子品质因数不均匀对于陀螺仪输出误差的影响具有一定的理论意义。在引入半球谐振子的环形振动模型的基础上,首先考虑参数激励方式下,品质因数不均匀引起的进动角速率误差的表达式,仿真分析了不均匀性四次谐波对陀螺仪漂移角度的贡献,结果表明漂移角度为具有趋势项的振动曲线。然后在位置激励方式下,通过开环和闭环两种模式分别研究了品质因数不均匀的四次谐波对于输入角速率解算的影响,得出了当位置激励对准固有韧性轴时,解算的误差能够得到抑制的结论。总之,在两种激励方式下,品质因数的四次谐波分量都会导致陀螺仪出现输出误差。
The quality factor heterogeneity of the hemispherical resonator is a main error source that causes the output error of the gyroscope. Therefore, in the two modes of parameter excitation and position excitation, the influence of the non-uniform quality factor of the resonator on the gyroscope output error has certain Theoretical significance. Based on the ring vibration model of the hemispherical resonator, the expression of precession angular velocity error caused by the non-uniformity of the quality factor under parametric excitation is first considered. The effects of the fourth harmonic of nonuniformity on the gyro drifting angle The results show that the drift angle is the vibration curve with trend term. Then, under the position excitation mode, the effects of the fourth harmonic with the non-uniform quality factor on the solution of the input angular velocity are investigated respectively by the open-loop and closed-loop modes. The results show that when the position excitation is aligned with the intrinsic toughness axis, Calculated error can be suppressed conclusion. In short, under the two excitation modes, the fourth harmonic component of the quality factor will cause the output error of the gyroscope.