【作者】 高峰；

【导师】 张合；

【作者基本信息】 南京理工大学 ， 机械电子工程， 2008， 博士

【摘要】 本文以某型弹道修正弹为应用背景,对基于地磁探测的姿态角探测技术及其弹道修正方法进行研究。基于地磁学基本理论,结合从地磁软件获得的数据,以我国领土范围为例对地球磁场进行了定量分析,确定了基于地磁信号测量实现弹丸姿态角解算的基本条件。研究了各种模拟和数字式磁传感器性能特点及其在弹道修正引信中应用的可行性,分析了它们各自的优缺点,设计了一种高分辨率的三维地磁探测系统。研究了基于地磁探测的弹道修正弹姿态角解算方法,分偏航角可忽略和偏航角不可忽略分别求解,推导出了各种情况的解析表达式,并利用图解法证明了解析解的正确性,针对弹丸的摆动干扰和地磁信号测量误差进行了姿态角误差分析及仿真。从定义出发得到了直线弹道滚转角的解算方法。根据带修正力的6自由度弹道模型,利用均匀设计法设计了仿真试验,通过回归分析得到了二维弹道修正脉冲力起始时间、修正级数和作用角度对不同初速和射角条件下弹丸落点修正效果的影响的数学模型,分析了各因素对脉冲修正效能的影响情况。提出了几种基于地磁探测的姿态角辨识系统电磁兼容性控制措施;深入分析弹体材料及其结构对其内置地磁传感器的影响情况,采用近似法计算弹体的磁屏蔽效能,并利用有限元软件ANSYS对弹体磁屏蔽效能进行了仿真验证。设计了初始信息装定系统。进行了滚转角辨识系统软硬件设计。开展了磁阻传感器的不等位电压实验,用两种方法验证其不等位电压。最后设计了两种姿态角标定方法,并利用滚转角辨识系统电路板进行了实验验证,结果表明其精度较高,可以满足弹道修正弹姿态角探测的需要。更多还原

【Abstract】 The autonomous attitude angles determination technology based on geomagnetic detection and the trajectory correction method for trajectory correction projectile are researched with the application background of attitude angles detection for a Trajectory Correction Projectile(TCP).Based on the theory of geomagnetism,combined with the data gained from geomagnetic software,,after analyzing the geomagnetic field of our nation in quantity,it is confirmed that the attitude angles algorithm for projectile can be realized based on geomagnetic field measurement.The properties of various magnetic sensors including analog and digital sensors are systematically summarized,their advantage and shortage are compared and a geomagnetic detection system with high resolution is designed.The algorithm of attitude angles of TCP is researched.It is pointed out that the full attitude angles can’t be calculated out only with geomagnetic detection but can be solved with different methods in two situations that the yaw of projectile is known and not known, so the solving expressions are brought out and its inaccuracy with the influence of oscillating of projectile are analyzed.Based on the above analysis,the optimum control measure for two dimension trajectory correction only with geomagnetic detection is brought out.Based on the model of ballistic of 6 degree of freedom the simulation experiments are designed by Uniform Design method.A model among correction ability of distance and angle for projectile with various initial velocity and firing angle by correction impulse with different correction delay time and class number of engine and its firing angle is obtained from the regression analysis,and the affection to the correction ability by the five elements is analized.Three measures to control the Electromagnetic Compatibility(EMC) of attitude determination system are brought out.The affection of geomagnetic signal with different material and structure of the projectile body is analyzed,the magnetic shielding effectiveness of projectile body is calculated by approximate method and proved by the numerical simulation with finite element software of ANSYS.The set system of initial information is designed.The simple 3 dimension geomagnetic acquisition system with high precision is designed to meet the need of signal acquisition for TCP.The experiment of bias voltage of electric bridge is carried out.The method of calibration for attitude angle based on 3 axle rotary platform is brought out.The circuit board for roll angle determination is used to test and the result shows that its precision is satisfiable and can meet the need of attitude determination for TCP.更多还原