【摘要】 当前船舶定位主要依靠全球导航卫星系统,一旦船载导航设备故障或信号受到人为干扰,船舶将无法正常定位,航行安全也将受到威胁。针对船舶在导航系统失灵时如何进行定位的问题,提出了一种基于星载自动识别系统的船舶定位技术。首先通过对卫星监测到的船舶信号进行测量,构造测频时差联合定位模型,然后为贴合船舶的实际运动状态,采用交互式多模型算法进行船舶的定位解算,并在解算过程中引入期望最大算法用以单个模型下的船舶状态估计。实验结果表明,提出的解算方法相比于交互式多模型算法有较好的准确度。更多还原

【Abstract】 The current vessel positioning relies on global navigation satellite system,the actual positions of vessels will lose and the safety of navigation cannot be guaranteed once the navigation equipment malfunctioned or the signal is deliberately interfered. To solve this problem,a new positioning technology based on the satellite automatic identification system is proposed. First of all,the ship positioning model was constructed through signals received by satellite. Then the positioning effect of this localization method was studied under interactive multi-model algorithm.And on the basis of this,the localization solution which introduced the expected maximum algorithm was analyzed.The simulation results show that the proposed algorithm has better accuracy than interactive multi-model algorithm.更多还原