一种改进的水下运动目标远航程导航定位方法

当前水下运动目标定位主要采用船载水听器基阵-声信标跟踪定位方法和船拖水听器基阵-声信标跟踪定位方法,但这两种方法存在跟踪定位精度较低、实施难度大以及设备维护修理困难等问题。基于此,提出了采用水下目标加装光纤陀螺仪-差分全球定位系统(DGPS)组合制导技术,以实时测量、记录水下目标的航行姿态、航行速度和位置坐标,通过编码把目标的位置坐标数据实时转换为同步水声多频多脉冲时延编码信号发射,利用船拖水听器测量水声多频多脉冲时延编码信号,通过船载基站实时解算,从而实现指引测控船完成远航程水下目标的实时跟踪、定位、监测任务。试验结果表明,该方法可有效实现对远航程水下目标的跟踪定位和实时监测。

An Improved Navigation Positioning Method for Underwater Moving Target at Long Range

Two conventional positioning methods for an underwater moving target, i.e. ship-borne hydrophone ar- ray-acoustic beacon tracking positioning method and ship-towed hydrophone array-acoustic beacon tracking positioning method, are of low tracking positioning accuracy, and of difficulty in implementation and equipment maintenance. So we presented an integrated guidance technology by equipping underwater target with optical fibre gyro and adopting dif- ferential global positioning system（DGPS） to measure and record in real time the attitude, velocity and position coordi- nates of an underwater moving target. The position coordinate data of the target are converted to synchronous underwater acoustic multi-frequency and multi-pulse time-delay encoded signal for transmission, and the encoded signal is measured by ship-towed hydrophones and real-timely resolved by ship-borne base station, thus the measuring and control ship can be guided to accomplish the tasks of tracking, positioning, and monitoring an underwater target at long range in real time. The sea trial result demonstrates the effectiveness of the proposed positioning technology.