航空磁梯度张量仪运动噪声仿真及其轻便型采集系统研究

发布时间：2017-12-28 06:09

本文关键词：航空磁梯度张量仪运动噪声仿真及其轻便型采集系统研究　出处：《吉林大学》2017年硕士论文　论文类型：学位论文

【摘要】：航空磁梯度张量探测具有空间分辨率高,获取信息量丰富,受地磁场影响小等优点,广泛应用于资源勘探、地质调查和军事反潜等方面。目前,国外在航空磁梯度张量系统的研制及实验数据的处理与解释等方面已取得一定成果,而国内在该领域的研究仍处于起步阶段。制约其发展的主要因素有:飞行器振动、姿态变化及其自身磁干扰等对张量仪测量的数据质量影响大且影响因素众多;现阶段研制的磁梯度张量系统大多处于体积大、功耗高的阶段,只能依赖大型的运载平台。因此,揭示出航空磁梯度张量仪运动噪声产生的内在机理,并研制轻便型的航空磁梯度张量采集系统会有力地推进航空磁梯度张量探测工作。本研究的核心内容及成果如下:(1)仿真模拟航空磁梯度张量探测,揭示张量仪运动噪声产生的机理。首先采用开源飞行模拟器Flight Gear中的JSBSim模型作为运载平台的动力学模型,并在Lab VIEW中搭建了飞控系统、探测任务导航系统、通信系统、磁偶极子的磁梯度张量模型、飞行器磁场干扰模型以及测量装置误差模型等,模拟了飞行勘探;然后针对仿真结果进行了分析,揭示了飞行器振动、姿态变化、磁干扰等对测量数据的影响情况;最后展开野外飞行对比实验,验证了仿真结果与实测结果存在一定的相似性,从而对此类系统的设计、实验测试、数据处理等起参考作用。(2)结合仿真结果,设计并实现轻便型航空磁梯度张量采集系统,完成系统性能评估与测试工作。采集系统由采集模块、路由器模块、嵌入式PC主控模块、人机交互模块与电源模块等组成。嵌入式PC通过TCP/IP协议与采集模块通信,完成磁场信息及采集模块设置指令的传输,并通过串口,获取惯导信息;人机交互模块采用外接显示屏和鼠标的方式,创建虚拟仪器面板,提高系统的人机交互性。利用模块化的思想实现了系统的软件部分,先分为三个实验系统,每个子系统下又有具体的功能模块。并针对采集系统的磁干扰、采集精度等进行评估,于室内外重复进行稳定性测试实验,确保采集系统满足野外勘测的要求。
[Abstract]:Airborne magnetic gradient tensor detection has many advantages, such as high spatial resolution, abundant information acquisition, and little influence by geomagnetic field. It is widely used in resource exploration, geological survey and military anti submarine exploration. At present, some achievements have been made in the field of aeromagnetic gradient tensor system and processing and interpretation of experimental data abroad. However, the domestic research in this field is still in its infancy. The main factors restricting the development of quality: the vehicle vibration and pose changes its magnetic interference on the measurement data of the tensor and the influence of many factors; magnetic gradient tensor system of the present stage developed mostly in large volume, high power consumption, can only rely on the large platform vehicle. Therefore, it reveals the inherent mechanism of the motion noise produced by the airborne magnetic gradiometer, and develops a portable airborne magnetic gradient tensor acquisition system, which will effectively promote the detection of airborne magnetic gradient tensor. The main contents and achievements of this study are as follows: (1) the simulation of aeromagnetic gradient tensor detection is simulated and the mechanism of the motion noise of tensor is revealed. We first used the JSBSim model of open source Flight flight simulator Gear as a platform vehicle dynamics model, and the Lab VIEW to build a flight control system, mission navigation system, communication system, magnetic dipole magnetic gradient tensor model, vehicle model and magnetic field measurement device error model, flight simulation and the exploration; according to the analysis of the simulation results reveal the effect of the vehicle vibration, attitude change, magnetic interference on the measurement data; finally, the wild flight experiments verify the simulation results and the measured results are somewhat similar, so this kind of system design, experimental testing and data processing for reference. (2) combining the simulation results, a portable aeromagnetic gradient tensor acquisition system is designed and implemented, and the performance evaluation and testing of the system are completed. The acquisition system is composed of the acquisition module, the router module, the embedded PC main control module, the human-computer interaction module and the power module. Embedded PC through TCP/IP protocol and communication acquisition module, transmission and magnetic information acquisition module is set up instructions, and through the serial port, to obtain navigation information; human-computer interaction module uses the external display and mouse, create a virtual instrument panel, improve machine interactive system. The software part of the system is realized by the idea of modularization, which is divided into three experimental systems first, and each subsystem has a specific function module. We evaluated the magnetic interference and acquisition accuracy of the acquisition system, repeated the stability test inside and outside the laboratory, and ensured that the acquisition system met the requirements of field survey.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P631.23

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