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摘要弹药滚转角初始对准是姿态测量的重要因素之一。由于弹药出膛之后才上电，且膛內转速极高，普通陀螺仪因不能承受其高过载、量程不够而无法使用。同时，由于炮身及周围磁场干扰，使用地磁矢量测量基准角误差极大，因而也不被使用。本文采用在炮口加装人口磁场的方法，既可以测量高转速弹药，也减小了周围磁场对测量精度误差的干扰。25256
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本文研究了在炮口加装人口强磁场测量滚转基准角的测量模型，具体是利用三轴地磁传感器敏感人工磁场，通过传感器与磁场矢量的关系推导出滚转基准角。在此基础上，建立了滚转角测量的模型，接着设计了原理样机，通过把地磁传感器测量数据存储到SD卡中，利用上位机软件处理分析，最后在低转速的情况下进行试验,对试验数据进行了分析，对滚转角的测量作了原理性的探索。
关键词 炮口磁场 对准 磁场传感器 滚转角
毕业论文设计说明书外文摘要
Title study in the reference of roll angel in muzzle
Abstract
Initial alignment of roll angle is an important factor in the attitude measurement. Since ammunition powers up when it is out of bore , and it is rating in such a high speed that the gyros can not afford the high overload, also the range of the
gyros is not enough .In all,the gyros can not be used. Meanwhile, the gun barrel is surrounded with other magnetic field,which will create much error,and therefore
geomagnetic vector measurement is not be used. In this paper,installation of population magnetic field in the muzzle not only measures high-speed ammunition, but also reduces the errors of ambient magnetic field interference.
This paper studies how to measure the roll reference angle in muzzle.Three-axis geomagnetic sensor is sensitive to artificial magnetic field,by which,the relationship between the sensor and the magnetic field vector is used to deduce roll reference angle. On this basis,a model to measure roll angle measurement is built, then the prototype is designed , the geomagnetic sensor data is stored in the SD card, the PC software is used to process and analysis in the prototype. Finally, the prototype is tested at low speeds to explore how to measure the roll angle in principle .
Keywords Muzzle magnetic field , alignment, Magnetic field sensors , roll angle
目 次
1 绪论 9
1.1 研究背景和意义 9
1.2 国内外研究现状 10
1.3 本文研究的主要内容 12
2 测量环境分析 14
2.1 地磁场分布模型 14
2.2 地磁参考模型 15
2.3 坐标系的定义 15
2.4 滚转角的定义 17
2.5 小结 18
3 炮口对准模型 19
3.1 滚转角初始对准模型 19
3.2 传感器设计 21
3.3 人工磁场设计 24
3.4 小结 25
4 滚转角测量模型 26
4.1 周期法 26
4.2 投影法 27
4.3 小结 28
5 试验样机开发 29
5.1 样机设计总体方案 29
5.2 微处理器设计 29
5.3 存储方案设计 30
5.4 采集系统设计 32
5.5 上位机软件设计 33
5.6 小结 34