共查询到19条相似文献,搜索用时 62 毫秒
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《中国测试》2017,(1):106-111
为降低载体上动中通的测控成本,提高其测控精度。本文提出一种利用大型载体上的高精度惯导辅助动中通进行天线校正的传递测控算法。针对大型载体的动态形变导致传递测控产生较大偏差的问题,采用一种利用卡尔曼滤波算法精确估计载体的动态形变以补偿传递测控算法中的动态误差的方法。仿真分析了迭代算法与卡尔曼滤波算法对船体动态形变估计的偏差,并对比分析传递对准姿态与从惯导姿态对参考值的估计误差。对仿真结果进行分析:卡尔曼滤波算法与迭代算法相比对载体动态形变估计更为准确。互补滤波的传递测控算法与从惯导直接测量滤波相比更接近参考值。仿真结果说明:通过传递测控算法利用精确惯导辅助低成本动中通进行精确测控的方法有效可行。 相似文献
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为了提高激光捷联惯导系统(LSINS)的导航精度,需要测试系统中惯性器件的模型参数。本文设计了一种利用双轴带温控箱速率转台的参数测试方法,测得了系统在各种环境温度下的参数。通过建模补偿有效地减小了LSINS的导航误差。实验结果表明本方法标定精度较高,适用于中等精度LSINS。 相似文献
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《中国新技术新产品》2015,(23)
本文以某个特定惯导系统为设计目标,根据系统导航定位精度这个中心指标,结合使用环境等因素,通过总体指标反推计算的方法,确定系统选用陀螺仪和加速度计的主要指标,完成选型设计。 相似文献
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Strapdown non-exchangeable error compensation technology in high dynamic
environment is one of the key technologies of strapdown inertial navigation system.
Mathematical platform is used in strapdown inertial navigation system instead of physical
platform in traditional platform inertial navigation system, which improves reliability and
reduces cost and volume of system. The maximum error source of attitude matrix
solution is the non-exchangeable error of rotation due to the non-exchangeable of finite
rotation of rigid bodies. The rotation non-exchangeable error reaches the maximum in
coning motion, although it can be reduced by shortening the correction period and
increasing the real-time calculation. The equivalent rotation vector method is used to
modify the attitude to reduce the coning error in this paper. Simulation experiments show
that the equivalent rotation vector method can effectively suppress the non-exchangeable
error and improve the accuracy of attitude calculation. 相似文献
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自适应滤波在平台自标定数据处理中的应用 总被引:2,自引:0,他引:2
目的:研究自适应卡尔曼滤波技术在平台自标定数据处理中的应用。方法:对平台标定中数据处理的一种方法是对角度传感器输出分析,解算出漂移角速率,并在此基础上辨识出漂移参数,由于平台自标定往往在动基座条件下进行,角度传感器输出中的噪声统计难以确定,并且会出现时变的情况,传统的卡尔曼滤波方法不能适用,自适应卡尔曼滤波在估计状态的同时,利用观测数据带来的信息,可在线估计噪声的统计特性,从而不断地改进滤波器的设计,结果与结论:对输出数据建立常速度模型,采用Sage-Husa自适应滤波算法,进行参数辨识,得到较好的效果。 相似文献
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Initial alignment is the precondition for strapdown inertial navigation system
(SINS) to navigate. Its two important indexes are accuracy and rapidity, the accuracy of
the initial alignment is directly related to the working accuracy of SINS, but in selfalignment, the two indexes are often contradictory. In view of the limitations of
conventional data processing algorithms, a novel method of compass alignment based on
stored data and repeated navigation calculation for SINS is proposed. By means of data
storage, the same data is used in different stages of the initial alignment, which is
beneficial to shorten the initial alignment time and improve the alignment accuracy. In
order to verify the correctness of the compass algorithm based on stored data and
repeated navigation calculation, the simulation experiment was done. In summary, when
the computer performance is sufficiently high, the compass alignment method based on
the stored data and the forward and reverse navigation calculation can effectively
improve the alignment speed and improve the alignment accuracy. 相似文献
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本文建立了应用现代优化理论进行弹丸自由飞行试验数据处理的数学模型,在此基础上,对常用的优化算法Chapmann-Kirk法(CKA)、最速下降法(SDA)、MarQuardt法(MA)进行了理论分析和研究,导出了改进的MarQuardt法(IMA),最后选用改进的MarQuardt法处理了某弹的自由飞行实验数据.结果表明本文方法适合自由飞行试验数据处理,收敛性好,可提高数据处理效率. 相似文献