共查询到14条相似文献,搜索用时 109 毫秒
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基于Kalman滤波的Wiener状态估值器 总被引:1,自引:0,他引:1
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. 相似文献
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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. 相似文献
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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. 相似文献
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用射影理论,基于Kalman滤波提出了通用和统一的白噪声估计方法,可统一解决带非零均值相关噪声的线性离散时变随机控制系统的白噪声滤波、平滑和预报问题.提出了输入白噪声估值器和观测白噪声估值器,最优和稳态白噪声估值器,固定点、固定滞后和固定区间白噪声平滑器,白噪声新息滤波器和Wiener滤波器.它可应用于石油地震勘探信号处理和状态估计,为解决信号和状态估计问题,提供了新的途径和工具.关于Bernoulli-Gaussian白噪声估值器的仿真例子说明了其有效性. 相似文献
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为了克服带相关噪声控制系统的最优固定区间Kalman平滑算法要求较大计算负担的缺点,应用Kalman滤波方法,基于CARMA新息模型,由稳态最优Kalman平滑器导出了带相关噪声控制系统的最优固定区间Wiener递推状态平滑器,它带有系数阵指数衰减到零的高阶多项式矩阵.用截断系数矩阵近似为零的项的方法提出了相应的快速次优固定区间Wiener平滑算法.它显著地减少了计算负担,便于实时应用,还给出了截断误差公式和选择截断指标的公式.仿真例子说明了快速平滑算法的有效性. 相似文献
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广义系统Wiener状态滤波新算法 总被引:1,自引:0,他引:1
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,由一种新的非递推最优状态估值器的递推变形,提出了广义系统Wiener状态滤波的一种新算法,它可统一处理滤波、平滑和预报问题,且具有渐近稳定性。同某些算法相比,它避免了求解Riccati方程和Diophantine方程,且避免了计算伪逆,因而减小了计算负担。仿真例子说明了其有效性。 相似文献
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广义系统Wiener 滤波和Kalman 滤波新方法* 总被引:5,自引:0,他引:5
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。 相似文献
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Zi-Li Deng 《International journal of systems science》2013,44(6):787-796
Using the modern time series analysis method, based on the autoregressive moving average (ARMA) innovation model and white noise estimators, two time-domain approaches to multichannel optimal deconvolution are presented. In the first approach, the multichannel optimal deconvolution estimators are given in the ARMA innovation filters form, where the solution of the Diophantine equations is required. Their global and local asymptotic stability is proved. In the second approach, the multichannel ARMA recursive Wiener deconvolution filters without the Diophantine equations are presented, which have asymptotic stability. The relationship between the ARMA innovation filters and ARMA Wiener deconvolution filters is discussed. Each approach can handle the deconvolution filtering, smoothing and prediction problems in a unified framework. An illustrative example and two simulation examples show their effectiveness. 相似文献
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New approach to information fusion steady-state Kalman filtering 总被引:3,自引:0,他引:3
Zi-Li Deng Author Vitae Yuan Gao Author VitaeAuthor Vitae Yun Li Author VitaeAuthor Vitae 《Automatica》2005,41(10):1695-1707
By the modern time series analysis method, based on the autoregressive moving average (ARMA) innovation model, a unified and general information fusion steady-state Kalman filtering approach is presented for the general multisensor systems with different local dynamic models and correlated noises. It can handle the filtering, smoothing, and prediction fusion problems for state or signal. The optimal fusion rule weighted by matrices is re-derived as a weighted least squares (WLS) fuser, and is reviewed. An optimal fusion rule weighted by diagonal matrices is presented, which is equivalent to the optimal fusion rule weighted by scalars for components, and it realizes a decoupled fusion. The new algorithms of the steady-state Kalman estimator gains are presented. In order to compute the optimal weights, the formulas of computing the cross-covariances among local estimation errors by Lyapunov equations are presented. The exponential convergence of the iterative solution of Lyapunov equation is proved. It is proved that the optimal fusion estimators under three weighted fusion rules are locally optimal, but are globally suboptimal. The proposed steady-state Kalman fusers can reduce the on-line computational burden, and are suitable for real-time applications. A simulation example for the 3-sensor steady-state Kalman tracking fusion estimators shows their effectiveness and correctness, and gives the accuracy comparison of the fusion rules. 相似文献