共查询到20条相似文献,搜索用时 58 毫秒
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递阶智能控制系统的一般结构 总被引:5,自引:0,他引:5
研究递阶智能控制系统的结构问题,介绍了递阶智能机器的一般结构,讨论了与组织级模型有关的决策段结构,并研究了协调级和执行级的控制结构模型。 相似文献
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多变量系统状态空间模型的递阶辨识 总被引:11,自引:1,他引:11
研究多变量系统状态空间模型的递阶辨识问题,推广了作者提出的标量系统状态和参数联合辨识算法.当状态可量测时,利用最小二乘原理直接辨识状态空间模型的参数矩阵;当状态不可测时,利用递阶辨识原理提出了状态空间模型递阶辨识方法,使用系统输入输出数据来估计系统的未知状态和参数.状态空间模型递阶辨识方法分为两步:首先假设系统状态是已知的(即参数估计算法中的未知系统状态用其估计代替),基于状态估计和系统输入输出数据递归计算系统参数估计;然后基于系统输入输出数据和获得的参数估计,递归计算系统的状态估计. 相似文献
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DSM (domain-specific modeling) offers many advantages over general purpose modeling, but this type of modeling is effective just in narrow domains. The recent MDE (model driven engineering) approaches seek to provide a technology to compose different specific domains in order to cover large scale systems. In this context, this article proposes a new approach for composing specific domain models. First, we analyze some related works. On the basis of the key findings and conclusions drawn from the analysis, we propose a multidimensional approach based on the composition of crosscutting concerns contained in the source domain models. The approach is illustrated by a composition of service domains. 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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本文运用比较原理和向量Lyapunov函数相结合等方法,首次讨论了具有脉冲扰动的线笥时变测度大系统的稳定性,给出了若干全局指数稳定的判据。 相似文献
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考虑状态矩阵中含不确定性的线性离散随机系统的鲁棒约束方差状态估计问题,即设计滤波增益,使摄动系统每个状态分量的估计误差方差的稳态值不大于各自预先给定值。给出了期望鲁棒滤波增益的存在条件及其解析表达式,并以数值算例说明了设计方法的直接性与有效性。 相似文献
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This paper is concerned with the design of a controller-observer scheme for the exponential stabilization of a class of singularly perturbed nonlinear systems. The controller design uses a sliding mode technique and is divided in two phases: slow feedback control and fast feedback control so that a final composite control is obtained. Assuming that only the fast state is available and the system's output is a function of the slow state, an observer design is presented. A stability analysis is also made to provide sufficient conditions for the ultimate boundedness of the full order closed-loop system when the slow state is estimated by means of the observer. An application to the model of a permanent magnet stepper motor is given to show the controller-observer methodology and stability analysis. 相似文献
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本文研究一类由N个子系统组成的具有多级动态结构线性大系统的多级反馈镇定问题,这类系统的多级反馈可镇定性与相应地导出系统分散反馈可镇定性等价。利用这种等价性以及系统本身的结构特征,给出了这类大系统可多级反馈镇定的充分条件。对于给定系统,应用本文的结论判别其多级反馈可镇定性是比较容易的。 相似文献
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G. Behrmann K.G. Larsen H.R. Andersen H. Hulgaard J. Lind-Nielsen 《Formal Methods in System Design》2002,21(2):225-244
We investigate techniques for verifying hierarchical systems, i.e., finite state systems with a nesting capability. The straightforward way of analysing a hierarchical system is to first flatten it into an equivalent non-hierarchical system and then apply existing finite state system verification techniques. Though conceptually simple, flattening is severely punished by the hierarchical depth of a system. To alleviate this problem, we develop a technique that exploits the hierarchical structure to reuse earlier reachability checks of superstates to conclude reachability of substates. We combine the reusability technique with the successful compositional technique of J. Lind-Nielsen, H.R. Andersen, G. Behrmann, H. Hulgaard, K. Kristoffersen, and K.G. Larsen, 1998. In: Tools and Algorithms for the Construction and Analysis of Systems, Vol. 1384 of Lecture Notes in Computer Science, pp. 201–216, and investigate the combination experimentally on industrial systems and hierarchical systems generated according to our expectations to real systems. The experimental results are very encouraging: whereas a flattening approach degrades in performance with an increase in the hierarchical depth (even when applying the technique of J. Lind-Nielsen et al. (1998)), the new approach proves not only insensitive to the hierarchical depth, but even leads to improved performance as the depth increases. 相似文献
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本文在讨论连续Wisenr过程的Legendre多项式逼近值的相关性和Wiener过程扰动下连续线性系统基于该正交多项的最小二乘估计有偏性后,提出了无偏一致的且数估计误差方差最小的Markov估计(最小方差估计)算法,并给出本文方法的仿真结果。 相似文献
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多组时滞大型控制系统的镇定 总被引:2,自引:0,他引:2
给出了由无时滞线性定常闭孤立控制子系统的渐近稳定性推出多组时滞线性定常闭环大型控制系统的渐近稳定性的充分条件,并说明了所得结果可以推广到多组时滞线性时变闭环大型控制系统与多组时滞线中立型定常(或时变)闭环大型控制系统,所得结果改进了前人的结果,通过参数镇定域的比较知,可使参数镇定域扩大为原来的6倍。 相似文献
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在网络化控制系统(Networked Control Systems,简记为NCSs)中,由于网络的介入使控制系统的规模和复杂性显著增加,且产生了各种新问题,为了使控制更加容易,需要设计合理的估计策略.主要从控制和通信2个角度出发,集中考虑了在量化影响、时延与丢包、不确定性等通信受限因素下状态估计策略的研究与进展.一直以来,状态估计都是诸如过程监控、故障诊断等控制领域中不可缺少的重要部分,当前已成为网络化控制系统研究的热点和准点,为抵消网络环境不确定性对闭环系统性能的影响,设计最优的状态估计策略必将成为不可缺少的因素之一. 相似文献


