船载磁探测器任意航向实时抗干扰技术研究

Study of the ship’s magnetic detector real time anti-interference technology on arbitrary headings

船载磁探测器测得的磁场信号中,除期望的船舶坐标系下的地磁场信号外,还包含多种干扰磁场信号,需进行抗干扰才能满足测磁要求。本文在分析各种干扰磁场信号特性及其排除方法的基础上,对任意航向上的三分量实时抗干扰技术进行了理论建模、算法实现以及工程适用性等研究,并通过MATLAB仿真验证该技术的可行性。该技术可使船载磁探测器的抗干扰摆脱时间、地点的限制,有效地解决船舶固定干扰磁场的实时排除,船舶固定磁场变化的实时监测等难题。

Not only the geomagnetic signal in ship coordinate system which we expected, but also several kinds of interference magnetic signals which we not expected, make up the magnetic signal measured by the magnetic detector on the ship. In order to meet the requirements, anti-interference measures must be taken.In this paper, based on the characteristics and eliminating method of the interference magnetic signals has been analysed, the theoretical modeling、algorithm implementation and engineering applicability of the real time three-component anti-interference technology on arbitrary headings have been studied, and MATLAB simulation has been took out to verify its feasibility. Base on the technology, the anti-interference of the magnetic detector on the ship can cast off the limitation of place and time, effectively solve the difficult problems such as eliminating the interference of the ship’s permanent magnetic and monitor the change of the ship’s permanent magnetic in real time.