船用光纤捷联系统标定技术

摘要

Aiming at the mechanical structure of DHGL⁃11 fiber optic strap⁃down system, analyses on error model, model building, design of calibration experiments, model precision testing, etc. have been carried out in this paper. Eventually the system error model that complies with the accuracy of system was acquired. Based on the principle of inertial sensor, system accuracy indicator and auxiliary equipment performance, etc., the system error model was determined. According to the error model, the speed test was designed based on the natural and reversal rotation scheme. On the basis of the error model of quartz flexible accelerometers, the calibration structure of North 24 loca⁃tions was designed. And the zero⁃revised test was designed to eliminate the zero error in the error model. At last, three tests were made, including the 5⁃min static alignment test, the 10⁃min dynamic alignment test that imitates the swing of ships and the 4⁃hour navigation test that simulates the environment of the swaying ship. The calibration precision of the error model was verified. The result showed that the calibration scheme can satisfy the demand of the DHGL⁃11 fiber optic strap⁃down inertial system.%针对DHGL⁃11型光纤捷联系统的机械编排结构进行了误差模型分析、模型建立、标定试验设计、模型精度验证等，最终获得符合系统精度的系统误差模型。根据惯性器件的原理、系统精度指标和辅助设备性能等因素确定了系统的误差模型。根据误差模型，以光纤陀螺指天正、反转方案设计了速率试验；根据石英挠性加速度计的误差模型，设计了指北二十四位置的标定编排结构；并设计了零位修正试验修正了误差模型中的零位误差。最后，设计了5 min静基座对准试验、10 min模仿船舶摇摆的动基座对准试验和4 h的模拟船舶摇摆环境的导航试验，对误差模型的标定精度进行了验证。实践证明，该标定方案可以满足DHGL⁃11型光纤捷联系统精度要求。