基于磁阻传感器的旋转弹姿态测量算法研究

摘要

The gyro cannot measure a rolling airframe missile's attitude accurately because it cannot overcome the contradiction between measurement range and measurement accuracy when a rolling airframe missile is rotating in high -speed. A kind of measuring algorithm with the characteristics of high accuracy and being suitable for big dynamic range was designed, which can guarantee missile' s autonomous navigation. This paper emphasized on a new algo-rithm by that the roll angle is broken down into new components and provides the formulas of yaw angle and pitch an-gle based on the geomagnetic information. The simulation results show that this algorithm is feasible and worthy of be-ing generalized, with high precision.%在旋转弹高速自旋的情况下,传统角速率陀螺测量滚转角时无法克服角速率量程和测量精度的矛盾,不能准确测量旋转弹弹体姿态.针对这一问题,在保证旋转弹的制导方式高度自主的前提下引入地磁信息,设计了一种高精度、适用于大动态范围的旋转弹姿态测量算法.着重针对滚转角的测量提出了一种新的解算思想,将滚转角以旋转弹横截面内的地磁矢量为界进行分解,并给出了结合地磁测量信息的偏航角、俯仰角计算公式.仿真结果表明:利用测量旋转弹姿态的算法是可行的,且精度高,值得推广.