共查询到18条相似文献,搜索用时 109 毫秒
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含结构参数扰动的线性连续系统的鲁棒约束方差状态估计* 总被引:2,自引:0,他引:2
本文考虑含结构参数扰动的线性连续随机系统的鲁棒约束方差状态估计问题,即设计滤波增益,使受扰系统每个状态分量的估计误差方差的稳态值不大于预先给定值,同时滤波矩阵具有期望的稳定裕度。本文给出了上述性能鲁棒滤波增益的存在条件及解析表达式,并提供了相应的数值例子。 相似文献
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本文提出一种新的性能鲁棒滤波增益的设计方法,即设计滤波增益,使得当系统噪声强度不确定时,系统每个状态的误差方差稳态值都不大于预先指定值,并举例说明这种设计方法的直接性与简单性. 相似文献
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考虑离散随机系统在模型噪声强度不确定及估计误差方差受约束情形下的一类鲁棒状态估计问题,即希望找到这样的滤波增益,使得当模型噪声强度在一定范围内变动时,每个状态分量的估计误差方差始终不大于预先指定值。文中给出了这种滤波增益的设计方法,并以一类机动目标跟踪问题为例,说明这种设计方法的直接性与有效性。 相似文献
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连续系统鲁棒约束方差估计的一种新方法 总被引:1,自引:1,他引:0
本文提出一种新的性能鲁棒滤波增益的设计方法,即设计滤波增益,使得当系统噪声强度不确定时,系统每个状态的误差稳态值都不大于预先的旨定值,并举说明这种设计方法的直接性与简单性。 相似文献
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离散系统的鲁棒约束方差估计及应用——模型噪声强度不确定情形 总被引:1,自引:0,他引:1
考虑离散随机系统在模型噪声强度不确定及估计误差方差受约束情形下的一类鲁棒状态
估计问题,即希望找到这样的滤波增益,使得当模型噪声强度在一定范围内变动时,每个状态
分量的估计误差方差始终不大于预先指定值.文中给出了这种滤波增益的设计方法,并以一
类机动目标跟踪问题为例,说明这种设计方法的直接性与有效性. 相似文献
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边缘粒子滤波是组合导航和目标跟踪中状态估计的高效方法;文章目的 是研究附加量测噪声具有时变未知方差的鲁棒边缘粒子滤波的算法并对算法仿真验证;设计方法是使用Rao-Blackwellised原则实现混合模型中状态降维,然后状态与量测方差同时分别估计;量测分布模型设置为具有鲁棒性质的学生t分布,通过这种量测似然模型得到粒子权值;变分推断方法加入混合滤波方案进行量测噪声方差参数的实时递推估计;重采样阶段粒子权值与状态及噪声参数一起进行重采样,结果是给出状态与噪声参数估计的鲁棒边缘粒子滤波;通过对常速目标运动跟踪模型量测噪声方差渐变和突变两种情况的仿真设置分析,验证了所提算法在量测方差变化情况下性能优于边缘粒子滤波算法的结论. 相似文献
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本文研究带不确定方差乘性和加性噪声和带状态相依及噪声相依乘性噪声的多传感器系统鲁棒加权融合估计问题.通过引入虚拟噪声补偿乘性噪声的不确定性,将原系统化为带确定参数和不确定加性噪声方差的系统,进而利用Lyapunov方程方法提出在统一框架下的按对角阵加权融合极大极小鲁棒稳态Kalman估值器(预报器、滤波器和平滑器),其中基于预报器设计滤波器和平滑器,并给出每个融合器的实际估值误差方差的最小上界.证明了融合器的鲁棒精度高于每个局部估值器的鲁棒精度.应用于不间断电源(uninterruptible power system,UPS)系统鲁棒融合滤波的仿真例子说明了所提结果的正确性和有效性. 相似文献
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Zijian Liu 《Asian journal of control》2012,14(3):846-850
A finite‐horizon robust estimator design approach is developed for a class of discrete time‐varying uncertain systems with state‐delay. It extends the Kalman filter to the case in which the considered system is subject to norm‐bounded uncertainties in both state and output matrices. The state and gain matrices of the designed filter are optimized to give a minimal upper bound such that the estimation error variance is guaranteed to lie within a certain bound for all admissible uncertainties. A simulation example is presented to show the effectiveness of the proposed approach by comparing to the traditional Kalman filtering method. Copyright © 2011 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society 相似文献
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误差方差及圆形区域极点约束下状态估计问题的研究:连续时间情形 总被引:4,自引:1,他引:3
提出并讨论了线性连续随机系统在稳态估计误差方差及圆形区域极点约束下的状态估
计问题,即希望设计滤波增益,使得每个状态分量的估计误差方差稳态值不大于各自预先给
定值,同时滤波矩阵的极点位于给定圆形区域内,从而使滤波过程具有良好的稳、暂态特性.
文中利用一修正的代数Riccati方程,给出了期望滤波增益的存在条件及解析表达式.数值
例子说明了文中设计方法的直接性和有效性. 相似文献
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Variance-constrained filtering for uncertain stochastic systems with missing measurements 总被引:2,自引:0,他引:2
In this note, we consider a new filtering problem for linear uncertain discrete-time stochastic systems with missing measurements. The parameter uncertainties are allowed to be norm-bounded and enter into the state matrix. The system measurements may be unavailable (i.e., missing data) at any sample time, and the probability of the occurrence of missing data is assumed to be known. The purpose of this problem is to design a linear filter such that, for all admissible parameter uncertainties and all possible incomplete observations, the error state of the filtering process is mean square bounded, and the steady-state variance of the estimation error of each state is not more than the individual prescribed upper bound. It is shown that, the addressed filtering problem can effectively be solved in terms of the solutions of a couple of algebraic Riccati-like inequalities or linear matrix inequalities. The explicit expression of the desired robust filters is parameterized, and an illustrative numerical example is provided to demonstrate the usefulness and flexibility of the proposed design approach. 相似文献
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Zidong Wang 《International journal of control》2013,86(4):303-311
This paper is concerned with the problem of robust state estimation for linear perturbed discrete-time systems with error variance and circular pole constraints. The goal of this problem addressed is the design of a linear state estimator such that, for all admissible uncertainties in both state and output equations, the following two performance requirements are simultaneously satisfied: (1) the poles of the filtering matrix are all constrained to lie inside a prespecified circular region; and (2) the steady-state variance of the estimation error for each state is not more than the individual prespecified value. It is shown that this problem can be converted to an auxiliary matrix assignment problem and solved by using an algebraic matrix equation/inequality approach. Specifically, the conditions for the existence of desired estimators are obtained and the explicit expression of these estimators is also derived. The main results are then extended to the case when an H performance requirement is added. Finally, a numerical example is presented to demonstrate the significance of the proposed technique. 相似文献