【摘要】 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。更多还原

【Abstract】 In order to satisfy the specified requirements of a Chinese research project, we develop a3-order leveling system of locked azimuth-gimbal initialization for an inertial platform. webuild it and,in laboratory tests, we find it work rather well with the inertial platform andsatisfy all specified requirements. Our design differs from traditional mehtod in that we consider variable paramenters. The fact is,as time passes, signal to noise ratio attenuates, anddamping needs to be adjusted to narrow frequency band width so as to conteract the said attenuation. Adjustment of damping means that parameters must vary also. The key equationin our mathematical derivation is eq (3), whose use makes it possible to lower intializationand improve the measurement of drift. Tests and simulation are done for both traditional 3-order leveling system and our 3--order variable parameter one. The resutts indicate that,under the same condition, our new syStem possesses the following advantages: fact levelingor low initialization time; improved measurement of drift of level gyro; better estimate of azimuth angle.更多还原