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arXiv 1604.04498eess.SYcs.SYmath.OC
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当代立方体求积法和无迹卡尔曼滤波方法是否总是优于传统扩展卡尔曼滤波?

Do the Contemporary Cubature and Unscented Kalman Filtering Methods Outperform Always the Traditional Extended Kalman Filter?

CEMAT (Center for Computational and Stochastic Mathematics), Instituto Superior Técnico, Universidade de Lisboa(里斯本大学高等理工学院计算与随机数学中心)

G. Yu. Kulikov, M. V. Kulikova

AI总结:

本文探讨了在存在刚性行为的随机系统中,传统扩展卡尔曼滤波可能优于当代方法的问题。

摘要:

本文简要技术笔记阐述了三种广为人知的状态估计器,这些在实践中被广泛应用。它们是相对老式的扩展卡尔曼滤波器(EKF)和最近设计的立方体卡尔曼滤波(CKF)和无迹卡尔曼滤波(UKF)算法。如今,人们普遍认为当代技术在状态估计的准确性上始终优于传统的EKF,这是由于在列出的滤波器的时间-测量更新步骤中,对传播高斯密度均值的高阶近似。然而,本文指明了这一普遍接受的观点,并表明尽管有上述理论事实,当所考虑的随机系统表现出刚性行为时,EKF可能在状态估计的准确性上优于CKF和UKF方法。这就是为什么刚性随机模型难以处理,需要设计有效的状态估计技术的原因。

英文摘要:

This brief technical note elaborates three well-known state estimators, which are used extensively in practice. These are the rather old-fashioned extended Kalman filter (EKF) and the recently-designed cubature Kalman filtering (CKF) and unscented Kalman filtering (UKF) algorithms. Nowadays, it is commonly accepted that the contemporary techniques outperform always the traditional EKF in the accuracy of state estimation because of the higher-order approximation of the mean of propagated Gaussian density in the time- and measurement-update steps of the listed filters. However, the present paper specifies this commonly accepted opinion and shows that despite the mentioned theoretical fact the EKF may outperform the CKF and UKF methods in the accuracy of state estimation when the stochastic system under consideration exposes a stiff behavior. That is why stiff stochastic models are difficult to deal with and require effective state estimation techniques to be designed yet.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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