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针对舰载机安全着舰对高精度、高可靠性着舰导引系统的迫切需求,研究了卫星/伪卫星/惯性组合着舰导引技术,基于几何精度因子(geometric dilution of precision,GDOP)计算提出了伪卫星在舰船上的布设方案,并设计了其导航电文结构。研究了卫星/伪卫星/惯性组合着舰导引算法,利用卫星及伪卫星的双差分载波相位信息,采用改进的模糊度最小二乘去相关平差(least-squares ambiguity decorrelation adjustment,LAMBDA)迭代算法解算其双差分整周模糊度,并基于舰载机运动模型建立滤波方程解算出舰机相对运动信息,再与惯导数据进行信息融合得到高精度的导引信息。仿真结果表明,提出的卫星/伪卫星/惯性着舰导引技术横向定位误差在0.3m以内,纵向定位误差在0.1m以内,高度定位误差在0.3m以内,可以满足舰载机着舰的要求,与卫星/惯性组合导引相比,该组合方式大大提高了垂直方向的定位精度,这对于确保安全着舰极为重要。并且,提出的着舰导引技术不仅精度高,而且工作连续可靠、抗干扰能力强,对保障舰载机着舰安全有重要的意义。
Aiming at the urgent need of carrier-based aircraft landing for guidance systems with high precision and high reliability, the guidance technology of satellite / pseudolite / inertial combination landing craft was studied. Based on geometric dilution of precision (GDOP) The calculation proposed the layout scheme of the pseudolite on the ship and designed its navigation message structure. The satellite / pseudolite / inertial combined landing guidance algorithm is studied. Based on the double differential carrier phase information of satellite and pseudolite, an improved iterative LAMBDA (least squares decorrelation adjustment) Algorithm to calculate its double-difference integer ambiguity. Based on the carrier-borne machine kinetic model, a filter equation is established to calculate the ship-ship relative motion information, and then the information is fused with the INS data to obtain high-precision guidance information. The simulation results show that the proposed satellite / pseudolite / inertial landing guidance technology within 0.3m horizontal positioning error, longitudinal positioning error within 0.1m, height positioning error within 0.3m, to meet the requirements of carrier-based aircraft Compared with the satellite / inertial combination guidance, the combination greatly improves the vertical positioning accuracy, which is very important for ensuring safe landing. Moreover, the proposed guidance technology for landing craft not only has high precision, but also has continuous and reliable work and strong anti-interference ability, which is of great significance to guarantee the safety of carrier-based aircraft.