捷联激光探测器组合GPS测量弹丸滚转角方法

Projectile Roll Angle Measurement Method of a Combination of Strapdown Laser Detector and GPS Measurement for Semi-active Laser Terminal Correction

针对激光半主动末段修正弹滚转角解算的问题,提出利用捷联激光探测器与弹载GPS组件的测量信息求解弹丸滚转角的方法。以理论计算得到的非滚转成像面上的目标成像点作为空中姿态对准的基准,结合激光探测器成像面上目标实际成像点,推导得到弹丸滚转角计算公式。利用蒙特卡洛模拟法仿真计算,分析弹丸在不同发射角下弹丸位置误差、速度误差和激光探测器测量误差对弹丸滚转角解算精度的影响。仿真结果表明:该方法对滚转角解算误差最大不超过4°;3种误差中,激光探测器测量误差对滚转角解算精度的影响最大。该方法满足精度和实时性要求,适用于低速滚转的激光半主动末段修正弹。

A method of which uses the measured information from onboard laser detectors and GPS to resolve the roll angle of semi-active laser terminal correction projectile is proposed. A formula to calculate the roll angle is deduced by comparing the real target imaging point on imaging planeof laser detector with the calculated target imaging point on non-roll imaging plane. The effects of measured errors of projectile position,projectile velocity and laser detector on the resolving accuracy of roll angle at different quadrant elevation angles are analyzed through the Monte-Carlo simulation. The simulated results show that the maximum error of roll angle is resolved to be less than 4° by the proposed method; the measured error of laser detector has the greatest effect on the resolving accuracy of roll angle among the 3 error sources. The proposed resolving method meets the accuracy and real-time requirements,and is suitable for solving the roll angle of semi-active laser terminal correction projectile with low rolling.