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机构地区:[1]南京理工大学自动化学院,江苏南京210094
出 处:《淮海工学院学报(自然科学版)》2017年第4期10-13,共4页Journal of Huaihai Institute of Technology:Natural Sciences Edition
基 金:国家自然科学基金资助项目(61473153);江苏省科技厅产学研联合创新资金前瞻性联合研究项目(BY2016004-04)
摘 要:针对基于三正交磁传感器在解算旋转弹体姿态过程中使用的极值比值法需要查表,且解算精度受所取极值点精度影响较大的问题,对极值比值法进行了改进,提出将积分比值法应用于三正交磁传感器的定姿.推导了旋转弹体的俯仰角表达式,使得在利用极值比值法进行实时姿态解算时无需任何预先辅助的存储数据,利用数值计算可直接得到俯仰角.然后使用磁传感器三轴数据进行积分比值解算弹体的姿态角.最后使用数值仿真对两种定姿方法的精度进行仿真验证.仿真结果表明,相较于极值比值法,积分比值法在旋转弹体的姿态解算中具有更高的精度和更好的抗干扰能力.As the current spinning projectile’s attitude measurement based on three orthogonal magnetic sensors using the method of extreme value ratio has to be based on look-up table and calculating precision is greatly influenced by the extreme points accuracy,the method of extreme value ratio is improved,and the integral ratio method is applied to the determination of three orthogonal magnetic sensors.The expression of pitch angle of rotating projectile is derived,which makes it unnecessary to store any data in advance when using the extreme ratio method to solve real time attitude data,and the pitch angle can be obtained directly by numerical calculation.Then the attitude angle of the projectile is calculated by using the three axis data of the magnetic sensor to calculate the integral ratio.Finally,the numerical simulation is used to verify the accuracy of the two methods.The simulation results show that the integral ratio method used in this paper has higher accuracy and better anti-jamming ability in the attitude calculation of rotating projectiles compared with the extreme value ratio method.
关 键 词:三正交磁传感器 旋转弹体 姿态测量 极值比值法 积分比值法
分 类 号:TP212.1[自动化与计算机技术—检测技术与自动化装置]
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