基于惯性系双积分的分布式POS抗干扰对准方法

Anti-disturbance High-precision Alignment for Distributed POS Based on Double Integral in Inertial Frame

分布式POS是一种基于惯性/卫星组合技术的柔性基线多节点高精度时空测量系统,是多任务航空遥感载荷高精度成像的关键装置。然而,外部扰动及节点间的柔性连接使得分布式POS不能采用传统解析粗对准方法进行高精度初始对准。为实现分布式POS系统在外部扰动下获得高精度初始姿态,提出了基于惯性系双积分的抗干扰对准方法,通过双积分去噪原理极大降低外部扰动影响,最后对算法进行了三轴转台实验和飞行实验验证。实验结果表明,该方法能够有效隔离载体的动态干扰,实现了分布式POS各节点初始姿态信息的高精度测量。

The distributed POS is a flexible baseline multi-node high-precision measurement system based on SINS/CGPS integrated navigation technique. It is the key equipment for multitask air-borne remote sensors. However, the external disturbance and the flexible connection between nodes make the distributed POS can't adopt the traditional coarse alignment to obtain high-precision initial attitude. In order to solve the above problem, an anti-disturbance high-precision alignment algorithm based on double integral in inertial frame was proposed. The method can greatly reduce the disturbance effect by the double integral, and three-axis turntable experiment and flight experiment were caried out to validate the algorithm.The experimental results show that the proposed algorithm can remove the external disturbance and realized the high precision measurement of multi-mode's initial attitude for distributed POS.