摘要
针对双轴旋转惯导惯性器件的随机误差无法在导航过程中自动进行补偿的问题,提出优化的两位置重调(TPR)的方法来补偿系统的随机误差导致的方位和位置误差,以提高双轴旋转惯导的长航时精度。与传统两位置重调(CPR)方法相比,使用优化的误差传递方程的两位置重调的方法,可以在少于6h条件下估计出系统的方位误差,从而使得系统的位置精度和方位精度都得以极大的提高。根据惯性器件的随机误差导致的方位误差的特性,建立了TPR的误差模型。通过仿真,证明了该方法的有效性。
The stochastic errors of inertial sensors in a dual-axis rotational inertial navigation system are not averaged out automatically during navigation. Therefore an optimized Twice Position-fix Reset（ TPR） method is provided to enhance accuracy of a dual-axis rotational INS by compensating stochastic errors. Compared with Conventional Position-fix Reset（ CPR） method,both an azimuth error and a radial-position error are extremely corrected within 6 hours by the TPR method. An optimized error propagation equation has built on the characteristics of an azimuth error introduced by stochastic errors of an inertial sensor. As the result,accuracy of the system is prominently enhanced,as is verified by simulation.
出处
《导航定位与授时》
2016年第4期25-29,共5页
Navigation Positioning and Timing
关键词
两位置重调
双轴旋转
随机误差
Twice position-fix reset
Dual-axis rotation
Stochastic error
