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提出了一种新的变参数销定方位环小转角对准法的三阶调平系统。用经典的方法，对平台式游移方位惯导系统进行初始对准，可测定和补偿平台三个轴的陀螺漂移，提高对准精度，缩短对准时间。但由于其调平回路是定参数的，其带宽不能适应调平过程中信噪比的变化，从而其性能不能达到最优。针对这一特点，本文提出了这种新方法，经理论分析和仿真研究表明，这种新方法比经典方法，调平速度快而且对水平陀螺测漂及方位角的估值的精度要高。
A new third-order leveling system is proposed based on the small-angle alignment method of variable-parameter locating azimuth rings. Using the classical method, the initial alignment of the platform-based heading inertial navigation system can measure and compensate the gyro drift of the three axes of the platform to improve the alignment accuracy and shorten the alignment time. However, due to its leveling circuit is a fixed parameter, its bandwidth can not adapt to changes in signal-to-noise ratio during leveling, so its performance can not be optimized. In view of this feature, this new method is proposed in this paper. The theoretical analysis and simulation results show that the new method is more accurate than the classical method in leveling the horizontal gyroscope and azimuth.