基于船姿测量的舰载光电经纬仪视轴稳定方法研究

利用船姿测量仪和光学编码器测出视轴稳定初始时刻的纵横摇角度和经纬仪方位俯仰角度,通过坐标变换技术将稳定点从甲板坐标系转换到大地坐标系中.实时测量由舰船摇摆引起的纵横摇角度变化量和编码器角度变化量,计算出视轴稳定点在大地坐标系中的偏离误差.利用伺服控制系统有效地补偿该误差,由此达到舰载光电经纬仪视轴稳定的目的.实际舰载跟踪试验证明了本文设计的视轴稳定系统准确度高,能够较好地隔离船摇对经纬仪视轴稳定的影响.

Study LOS Stabilization of Warship-based Electro-optical Theodolite Based on Measure by Sensors of Vessel

The pitch and roll of vessel are measured by sensors of vessel attitude in geodetic coordinate system.With the consideration of the azimuth and pitching of theodolite from optical encoder,the position of LOS stabilization is transformed from deck coordinate system to geodetic coordinate system by usin g coordinate axis circumrotation.Angle changes are measured by optical encoder and sensors of vessel attitude in real time.The error of LOS stabilization is computed in geodetic coordinate system with the data of these changes.The error is effectively compensated by servocontrol system in order to solve the problems of LOS stabilization availably.Practical tracking experiments based on warship prove this system is of high precision in the aspect of LOS stabilization,and is powerful with excellent effect in mitigating the influence of ship-sway.