航天测量船静电陀螺监控器海上动态标定

Dynamic calibration of ESGM on TT&C ship at sea area

为减小海上动态条件下静电陀螺监控器标定过程外界因素的影响,提高航天测量船组合导航系统静电陀螺监控器海上测量数据的输出精度,通过对静电陀螺监控器标校过程原理的研究,分析了惯导水平姿态误差、船舶机动、标定参数耦合等因素对静电陀螺监控器标定效果的影响并进行了仿真试验,提出了静电陀螺监控器海上动态条件下进行标定的方法和航行工况保障要求。实际结果证明,通过提高惯导系统初校精度、施放减摇鳍减小船摇、减少船舶机动、改变船舶航向进行标定参数解耦等方法对提高海上动态条件静电陀螺监控器标定效果行之有效,对提高航天测量船组合导航系统数据输出精度具有重要意义。

In order to reduce the influence of dynamic marine conditions on ESGM calibration process and improve the accuracy of the TT＆C ship＇s electrostatic supported gyro monitor（ESGM） marine measurement data, the ESGM calibration technique was studied. The affecting factors such as the INS horizon error, ship maneuver, calibration parameters＇ coupling on the ESGM were analyzed in ESGM calibration techniques, and the simulations were carried out. The ESGM＇s calibration methods under dynamic situation and the support requirements for navigation condition at sea were put forward. The test results show that the ESGM under marine dynamic condition can be effectively calibrated by improving the initial calibration precision of INS and casting fin to reduce ship shake, reducing the ship maneuvering and changing the ship＇s sailing directions to decouple the calibration parameters, etc.. These methods are helpful in improving the data output accuracy of space measurement on the TT＆C ship under dynamic conditions at sea area.