为解决动基座条件下罗经控制法误差较大的问题,通过捷联罗经的原理框图和算法设计,使用梅森增益公式。分别画出东向通道、北向通道、罗经回路的信号流图。对动态条件下罗经回路对准方法的误差进行了深入分析,采用“等效器件误差”的方法,将匀速状态下栽体的机动引起的误差看作固定数值的陀螺输出偏差和固定数值的加表输出误差,将匀加速状态下载体的机动引起的误差看作斜线变化的陀螺输出偏差和斜线变化的加表输出偏差,定量给出了匀速、匀加速以及周期性震荡加速度条件下所引起的罗经回路对准方法的水平失准角和方位失准角稳态误差角的表达式,并通过仿真验证,为在载体机动条件下使用罗经回路初始对准方法提供技术支撑。
In order to solve the problem of the bigger error of the compass-circuit alignment method in the dynamic environment, this paper gives the signal process figure of the east circuit, the north circuit and the azi muth circuit by using the theory figure and the design process of the strap-down inertial compass alignment. It deeply analyzes the reason of the bigger dynamic error. Using the method called "equal sensor bias", the paper makes the velocity, acceleration and the changing of the latitude equal to the drift of the gyroscope and the bias of the accelerator. It also gives the expression of dynamic error of the east circuit, the north circuit and the azi muth circuit caused by the velocity and the acceleration, which is demonstrated by the simulation.