基于Kalman滤波的带相关噪声系统统一的Wiener状态估值器

基于Kalman滤波和白噪声估值器, 对带非零均值相关噪声系统提出了渐近稳定的统一的和通用的Wiener状态估值器. 它们可统一处理滤波、平滑和预报问题, 且避免了计算最优初始状态估值. 它们揭示了Kalman滤波器和Wiener滤波器之间的关系.一个仿真例子说明其有效性.     

时域Wiener状态滤波新方法

基于稳态Kalman滤波器和射影理论,提出了统一和通用的时域Wiener状态滤波新方法,用它得到带非零均值相关噪声线性随机系统的渐近稳定的Wiener状态估值器和解耦Wiener状态估值器.它可统一处理状态滤波、预报和平滑问题.发现了Kalman滤波器和Wiener滤波器之间的变换关系,Wiener状态估值器可由Kalman估值器通过自回归滑动平均(ARMA)新息模型得到.一个仿真例子说明了其有效性.     

Wiener 状态滤波器设计新方法

基于经典稳态Kalman滤波理论，应用射影理论，对完全可观完全可控的系统提出了设计Wiener状态滤波器的新方法，可统一处理稳定或不稳定系统的最优预报，滤波和平滑问题，估值器具有ARMA递推形式，且具有渐近稳定性，仿真例子说明了该算法的有效性。     

基于Kalman滤波的Wiener状态估值器

应用经典稳态Kalman滤波理论提出了设计Wiener状态估值器的新方法,其原理是:基于在Wiener滤波器形式下的稳态Kalman滤波器和预报器及ARMA新息模型,由稳态最优非递推状态估值器的递推变形引出Wiener状态估值器.所提出的Wiener状态估值器可统一处理状态滤波、预报和平滑问题.它们具有ARMA递推形式,且具有渐近稳定性和最优性,仿真例子说明了它们的有效性.     

Wiener状态去卷滤波器

应用现代时间序列分析方法,基于ARMA新息模型提出了一类带多重观测滞后和带滑动平均（MA）有色观测噪声系统的Wiener状态去卷滤波器,它具有渐近稳定性和ARMA递推形式,可统一处理滤波、平滑和预报问题,且可用于解决带ARMA有色观测噪声系统状态估计和信号Wiener滤波与反卷积问题,二个仿真例子说明了其有效性。     

广义系统Wiener 滤波和Kalman 滤波新方法*

应用时域上的现代时间序列分析方法,基于ＡＲＭＡ新息模型和白噪声估计理论,提出了广义系统的Ｗｉｅｎｅｒ状态估值器和急剧记Ｋａｌｍａｎ估值器。它们可统一处理最优滤波,平滑和预后问题。     

Wiener滤波新方法

基于ＡＲＭＡ新息模型提出Ｗｉｅｎｅｒ滤波的一种新的时域方法。对带状态空间模型的线性离散随机系统，提出一种Ｗｉｅｎｅｒ状态估计器，可统一处理最优滤波、平滑和预报问题，且具有渐近稳定性，避免了求解Ｄｉｏｐｈａｎｔｉｎｅ方程和Ｒｉｃｃａｔｉ方程。仿真例子说明了其有效性。     

统一的和通用的Wiener状态滤波器

用现代时间序列分析方法,基于ARMA新息模型提出了带拟白噪声、拟相关噪声和带观测滞后系统的统一的通用的渐近稳定的Wiener状态滤波器,可统一处理状态滤波、平滑和预报问题.同Kalman滤波方法和多项式方法相比,避免了求解Riccati方程和Diophantine方程.仿真例子说明了其有效性.     

基于Kalman滤波的自回归滑动平均信号信息融合Wiener滤波器

应用Kalman滤波方法,在按矩阵加权线性最小方差最优信息融合规则下,提出了带白色观测噪声的多通道ARMA信号的多传感器信息融合Wiener滤波器.它可统一处理信息融合滤波、平滑和预报问题.为了计算最优加权阵,提出了计算局部滤波误差互协方差阵的公式.同单传感器情形相比,可提高估计精度.一个带三传感器的目标跟踪系统的仿真例子说明了其有效性.     

一种鲁棒自适应推广Kalman滤波及其在飞行状态估计中的应用

本文在自适应推广Kalman滤波基础上，为了防止滤波发散，改善自适应Kalman滤波的数值稳定性和计算效率，利用U－D分解滤波，并引进滤波发散的判据等，提出一种鲁棒自适应推广Kalman滤波新算法，并把该算法应用于飞行器飞行状态估计问题，仿真及实际计算结果证明了本文方法的有效性。     

Real‐time Kalman filtering based on distributed measurements

A kind of real‐time Kalman filtering problem is discussed for systems with distributed multichannel measurements. Recursive filters are presented for two cases with correlated and uncorrelated measurement noises. An optimal algorithm is constructed using projection theory in Hilbert space according to a first‐come‐first‐served scheme. An update is generated whenever a new measurement arrives at a central unit. Therefore, the algorithm has the practical advantages of flexibility and the easiness for real‐time implementation. Copyright © 2012 John Wiley & Sons, Ltd.     

广义容积卡尔曼滤波

传统CKF采用三阶球面径向容积定律来计算非线性积分,该定律将球面数值积分与径向积分相结合,难以构造高阶CKF算法。此外,CKF在许多非线性问题上表现出估计精度低等问题。为了解决以上问题,提出了一种广义CKF族,所提算法彻底抛弃了球面径向积分定律。进一步指出,传统CKF是这种滤波算法的特殊形式。实验结果表明,高阶CKF比传统的非线性滤波器准确性更高。     

极点配置固定区间Kalman平滑器和Wiener平滑器

基于稳态Kalman滤波器和白噪声估值器,根据控制理论中的极点配置原理,提出了极点配置固定区间稳态Kalman平滑器和Wiener平滑器.它们避免了计算最优平滑初值,且通过配置平滑器的极点,可快速消除初始平滑估值的影响,因而它们具有在有限固定区间上的实用稳定性,仿真例子说明了它们的有效性.     

一种利用UKF的高速公路实时交通状态估计方法

把无轨迹卡尔曼滤波器（UKF）和宏观随机交通流模型结合在一起,可以实现对高速公路交通状态的实时估计。高速公路被看作是由等距离的路段首尾相接而成的系统,每个路段中交通变量的更新不光与其自身有关,还受到相邻路段的影响。交通传感器通常设置在路段的交界处,而且数量远少于所需估计的交通状态。采用压缩状态空间的形式,将模型参数也作为交通状态而非常量进行估计。仿真结果表明UKF方法能够有效地估计和跟踪交通状态的变化,并且与扩展卡尔曼滤波方法相比具有更高的精确度。     

Extended Kalman filters for fractional‐order nonlinear continuous‐time systems containing unknown parameters with correlated colored noises

By using the Grünwald‐Letnikov (G‐L) difference method and the Tustin generating function method, this study presents extended Kalman filters to achieve satisfactory state estimation for fractional‐order nonlinear continuous‐time systems that containing some unknown parameters with the correlated fractional‐order colored noises. Based on the G‐L difference method and the Tustin generating function method, the difference equations corresponding to fractional‐order nonlinear continuous‐time systems are constructed respectively. The first‐order Taylor expansion is used to linearize the nonlinear functions in the estimated system, which provides the system model for extended Kalman filters. Using the augmented vector method, the unknown parameters are regarded as new state vectors, and the augmented difference equation is constructed. Based on the augmented difference equation, extended Kalman filters are designed to estimate the state of fractional‐order nonlinear systems with process noise as fractional‐order colored noise or measurement noise as fractional‐order colored noise. Meanwhile, the extended Kalman filters proposed in this paper can also estimate the unknown parameters effectively. Finally, the effectiveness of the proposed extended Kalman filters is validated in simulation with two examples.     

Continuous-time norm-constrained Kalman filtering

This paper considers continuous-time state estimation when part of the state estimate or the entire state estimate is norm-constrained. In the former case continuous-time state estimation is considered by posing a constrained optimization problem. The optimization problem can be broken up into two separate optimization problems, one which solves for the optimal observer gain associated with the unconstrained state estimates, while the other solves for the optimal observer gain associated with the constrained state estimates. The optimal constrained state estimate is found by projecting the time derivative of an unconstrained estimate onto the tangent space associated with the norm constraint. The special case where the entire state estimate is norm-constrained is briefly discussed. The utility of the filtering results developed are highlighted through a spacecraft attitude estimation example. Numerical simulation results are included.