海军工程大学电气与信息工程学院,武汉,430033
网络首发:2011-12-10,
纸质出版:2011
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常国宾, 许江宁, 李安, 等. 迭代无味卡尔曼滤波的目标跟踪算法[J]. 西安交通大学学报, 2011,45(12):70-74.
A Target Tracking Method of Iterative Unscented Kalman Filter[J]. 2011, 45(12): 70-74.
针对目标跟踪迭代无味卡尔曼滤波(IUKF)算法中跟踪精度较差的问题
提出一种基于状态扩展技术的改进迭代无味卡尔曼滤波(IIUKF)算法.新算法首先将观测噪声扩展进状态
构造关于扩展状态的零噪声观测方程
然后在观测迭代过程中将最新的扩展状态后验估计代入更新公式
进行观测迭代更新.相比IUKF算法
IIUKF算法不仅形式上更为简洁
而且避免了IUKF算法中先验估计和观测噪声非统计正交的问题
滤波精度更高.数值仿真表明
IIUKF算法的跟踪误差比IUKF算法减小了20%以上.
An improved iterative unscented Kalman filter(IIUKF)is proposed to increase the target tracking accuracy of iterative unscented Kalman filter(IUKF)by using the state augmentation technique. The method augments measurement noises into states
and a measurement function of augmented state with zero measurement noise is constructed. Then the latest posterior estimate of the augmented state is substituted into a updating function to iteratively correct state estimation using measurements. Comparing analyses with IUKF shows that IIUKF is more concise
and is more precise since it avoids the statistical non-orthogonal problem
Results of digital simulation show that there is a 20% decrease in the tracking error of IIUKF over that of IUKF.
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