Method and system for resolving roll angle of rotating aircraft

The invention discloses a method and a system for resolving a roll angle of a rotating aircraft. A dynamic equation set around the center of mass of the aircraft is established as a driving equation, a relation equation between a geomagnetic azimuth angle and a pitch angle, a yaw angle, a magnetic declination angle, a magnetic dip angle and a course angle is taken as an observation equation, and an actual measured value of the geomagnetic azimuth angle is taken as an observed quantity; a pitch angle and a yaw angle are estimated through extended Kalman filtering; a geomagnetic vector reference angle is resolved; and finally, a high-precision roll angle is calculated. According to the method and the system for resolving the roll angle of the rotating aircraft, the resolving precision of the roll angle is improved. 本发明公开了一种旋转飞行器滚转角解算方法及系统，通过建立绕飞行器质心动力学方程组为驱动方程，以地磁方位角与俯仰角、偏航角、磁偏角、磁倾角和航向角的关系方程为观测方程，以地磁方位角的实际测量值为观测量，通过扩展卡尔曼滤波估计俯仰角和偏航角；然后解算地磁矢量基准角；最后解算出高精度的滚转角；本发明的旋转飞行器滚转角解算方法及系统，提高了滚转角的解算精度。