二频机抖陀螺具有较高的精度,但在每个抖动周期需要两次通过锁区,会丢失部分信息,从而带来了过锁误差。噪声注入只能将误差随机化,并不能从根本上消除误差。根据锁区方程阐述了锁区对机抖陀螺精度的影响。对二频机抖陀螺的锁区补偿方案进行了理论研究。采用零速率点恒加速近似得到了过锁误差的信号表征方法。数值分析表明该锁区补偿方法在各种外界输入转速下都是有效的。 Two-frequency jib gyro with high accuracy, but in each jitter cycle through the lock area twice, will lose some of the information, resulting in over-lock error. Noise injection can only randomize the error and does not eliminate the error fundamentally. According to the lock area equation, the effect of the lock area on the accuracy of the jitter gyro is illustrated. A theoretical study is carried out on the compensation scheme of the lock area of ​​the two-way jib gyro. The method of signal characterization of over-lock error is obtained by using zero-rate point-constant acceleration approximation. Numerical analysis shows that the lock area compensation method is effective under various external input speeds.