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基于贝叶斯估计噪声相关下的CKF设计 被引量:7

Design of CKF with correlative noises based on Bayesian estimation
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摘要 针对常规容积卡尔曼滤波(cubature Kalman filter,CKF)要求系统噪声和量测噪声必须互不相关的局限性,提出了一种带相关噪声的非线性离散系统CKF设计方法。基于贝叶斯估计准则,给出了系统噪声和量测噪声相关时CKF滤波递推公式,并采用三阶球面-相径容积规则来近似计算系统状态的后验均值和协方差。当系统噪声和量测噪声相关时,常规CKF不适用,本文设计的噪声相关下的CKF可以有效地对状态进行估计,拓展了CKF的应用范围。数值仿真验证了算法的有效性。 According to the limitation that the conventional cubature Kalman filter (CKF) requires system and measurement noise to be uncorrelated, a novel CKF with correlative noises for nonlinear discrete-time Gaussian systems is designed. A set of recursive filtering equations of CKF with correlative noises are derived based on Bayesian estimation rule, and the third-order spherical-radial cubature rule is utilized to approximate the postrior mean and covariance of the state. The proposed method can estimate the state as a conventional CKF is unavailable when the system and measurement noise are correlative Gaussian white noises, which expends the application of CKF. The effectiveness of the proposed method is verified by a numerical simulation example.
出处 《系统工程与电子技术》 EI CSCD 北大核心 2012年第11期2214-2218,共5页 Systems Engineering and Electronics
基金 国家自然科学基金(61104036)资助课题
关键词 非线性高斯系统 噪声相关的容积卡尔曼滤波 贝叶斯估计 三阶球面-相径容积规则 nonlinear Gaussian system cubature Kalman filter (CKF) with correlative noises Bayesian estimation third order spherical-radial cuhature rule
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参考文献17

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二级参考文献34

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