机动飞行器三维运动制导误差计算方法研究

Algorithm on Navigation Error of 3-D Motion for Maneuvering Vehicle

为实现对机动飞行器制导系统误差高精度的仿真计算,针对基于射面内的常规算法简化过程对滑翔跳跃等弹道轨迹的不适用性,引入三维弹道求差的概念,考虑飞行器横侧向机动所产生的视加速度和姿态角,利用完整的捷联惯组陀螺仪及加速度计的误差模型和弹道数据激励,对机动飞行器的制导误差进行积分求解,获取了飞行器的纵程与横程偏差。仿真结果证明,该算法克服了传统算法有损简化的缺陷,有效提高了计算结果的精度。

In order to achieve more precise calculation result of navigation system error for maneuvering vehicle,the concept of 3D trajectory difference computing was introduced in this article,compared with the shortage of conventional algorithms that incorrectly simplified for flexible flight trajectory. Taking the lateral and normal apparent acceleration,roll and yaw angles into account,based on general error model of strap-down inertial navigation system,the hit accuracy can be acquired by numerical integration in which the right function deduced from gyroscope and accelerometer error item excited by trajectory parameters. The simulation result demonstrates that the algorithm compensates the disadvantage of oversimplification of previous method and highly improves calculation accuracy.