共查询到19条相似文献,搜索用时 78 毫秒
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YuanFeng Ming-ShengYing 《计算机科学技术学报》2004,19(C00):23-23
在人工智能领域,动态系统的行为推理是一个非常热门的研究课题,其中最重要的问题是如何描述系统以及如何进行推理。在这一方面,人们已经提出很多形式化的方法。典型的描述动态系统的方法是引进一个取值随系统进化而改变的“事实”(fact)的集合,以及定义行为对“事实”的影响函数,以方便描述由执行特定的动作引起的状态转移;典型的推理问题是逻辑蕴涵,即寻找一种特定的适合描述动态系统的逻辑,在此逻辑下,系统状态的属性可以由有关系统的一些假设出发推导出来。 相似文献
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本文介绍非线性H∞控制的状态空间方法,首先给出了非线性系统的H∞控制问题,然后利用有限L2增益的概念,分别导出了基于状态反馈和输出反馈的非线性H∞控制器及其存在的条件,它与哈密顿一雅可比不等式的解有关。在本文中,详细地阐述了非线性H∞控制器设计的基本思想。 相似文献
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基于遗传算法的非线性系统状态空间辨识 总被引:3,自引:0,他引:3
本文提出了一种基于遗传算法用状态空间方程描述非线性系统的辨识方法,研究表
明遗传算法能克服此类系统不能采用传统最小二乘法辨识的困难,并能有效地辨识出状态空
间维数及非线性度都不高的系统,同时指出基于遗传算法的非线性状态空间辨识方法在状态
维数确定、关键项确定和非关键项删除等方面还有待进一步研究. 相似文献
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针对城市公共交通系统中公交优化调度问题的具体特征,提出一种基于状态空间模型的实数编码智能优化算法(SIA)。SIA引入遗传算法(GA)的基本理念。通过构造状态进化矩阵来指导算法的搜索方向,再通过选种池的优胜劣汰的选择机理来实现算法朝最优解逼近。将该算法与GA分别应用到公交优化调度问题中,考虑发车时间间隔的约束,建立以企业和乘客的利益最大化为目标的数学模型。实例仿真结果表明,SIA在寻优精度和计算量方面优于GA,验证了该算法的有效性。 相似文献
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随着系统生物学和医学的迅速发展,基因调控网络已经成为一个热点研究领域.布尔网络作为研究生物系统和基因调控网络的一种重要模型,近年来引起了包括生物学家和系统科学家在内的很多学者的广泛关注.本文利用代数状态空间方法,研究了概率级联布尔网络的集镇定问题.首先给出概率级联布尔网络集镇定的定义,并利用矩阵的半张量积给出了概率级联布尔网络的代数表示.其次基于该代数表示,定义了一组合适的概率能达集,并给出了概率级联布尔网络集镇定问题可解的充要条件.最后将所得的理论结果应用于概率级联布尔网络的同步分析及n人随机级联演化布尔博弈的策略一致演化行为分析. 相似文献
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This paper addresses two kinds of optimal control problems of probabilistic mix-valued logical control networks by using the semi-tensor product of matrices, and presents a number of new results on the optimal finite-horizon control and the first-passage model based control problems, respectively. Firstly, the probabilistic mix-valued logical control network is expressed in an algebraic form by the semi-tensor product method, based on which the optimal finite-horizon control problem is studied and a new algorithm for choosing a sequence of control actions is established to minimize a given cost functional over finite steps. Secondly, the first-passage model of probabilistic mix-valued logical networks is given and a new algorithm for designing the optimal control scheme is proposed to maximize the corresponding probability criterion. FinMly, an illustrative example is studied to support our new results/algorithms. 相似文献
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This paper introduces singular mix-valued logical networks and singular mix-valued logical control networks. Via semi-tensor
product, a singular mix-valued logical network can be converted to an algebraic form. On this basis, the normalization problem and
solvability are discussed. Then, fixed points and cycles of singular mix-valued logical networks are also studied. Furthermore, the
optimal control problem of singular mix-valued logical control networks is presented and a necessary condition for the existence
of the optimal control is supplied, based on which, an algorithm is provided. Illustrative examples are given to show the feasibility
of the results. 相似文献
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从信息单元处理流程和缓冲设计的角度探讨了机器人多传感器联合系统的逻辑和代数分析方法.在分析几种典型的多传感器的结构和缓冲设计模型的基础上,文章引入基于Petri Nets的逻辑表达方法和基于[Max, ]半环的代数分析方法.以自主式移动机器人的多传感器联合系统为背景,文章系统探讨了多传感器联合系统的逻辑和代数分析方法的具体应用.实验数据表明,这种多传感器联合系统的逻辑和代数分析方法可以满足自主式移动机器人系统分析和仿真的需要 相似文献
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This contribution presents a numerical approach to approximate feedback linearization which transforms the Taylor expansion of a single input nonlinear system into an approximately linear system by considering the terms of the Taylor expansion step by step. In the linearization procedure, higher degree terms are taken into account by using a state space embedding such that the corresponding system representation has not to be computed in every linearization step. Linear matrix equations are explicitly derived for determining the nonlinear change of coordinates and the nonlinear feedback that approximately linearize the nonlinear system. If these linear matrix equations are not solvable, a least square solution by applying the Moore–Penrose inverse is proposed. The results of the paper are illustrated by the approximate feedback linearization of an inverted pendulum on a cart. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
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Seong-Jin Park 《International journal of control》2013,86(12):2046-2057
This article addresses a modular state feedback supervisory control problem where two local controllers should achieve a common control objective against another local controller. Each local controller has its own control objective described as a predicate. This article also addresses a nonblocking modular control problem in which a discrete event system controlled by three local controllers tends to reach the common marked states of two local controllers that are, however, prohibited by the third local controller. For a case study, we apply the proposed theory to an oligopolistic market composed of two firms and one government. Two oligopolistic firms have a common objective to maximise their total profit through collusion. However, the government prevents them from engaging in collusion. We show that the modular supervisory control theory presented in this article can be used to solve the problem of ‘how can the firms maximise their total profit against the intervention of government’? 相似文献
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P. N. Paraskevopoulos F. N. Koumboulis K. G. Tzierakis G. E. Panagiotakis 《Systems & Control Letters》1992,18(4)
The following four major aspects for the observer design problem for generalized state space systems with unknown inputs are resolved: Necessary and sufficient conditions for the problem to have a solution, the order of the minimal observer, the properties of the closed-loop system (separation principle) and general analytical expressions of the minimal order observer matrices. All above results are first in the field. 相似文献
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鉴于非线性系统分析的核心归结为系统状态方程的求解,针对一般非线性控制系统,引入由状态量、控制量与自变量时间t为坐标构成的"广义时态空间".为了求解非线性状态方程,在广义时态空间(tk,x(k),u(k))处将方程的右端展开为(t?tk)的Taylor级数,通过直接积分获得了非线性控制系统状态方程关于自变量时间(τ=t?tk)的级数解,并证明了解的收敛性. 相似文献
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Petri网和有限自动机是离散事件动态系统的两类主要研究内容.而Petri网系统的能观性分析与判别是基于Petri网的实际系统设计、优化、监测及控制的重要基础.以往关于Petri网能观测性的研究缺乏定量化的充要判别条件.本文利用代数矩阵方法研究了带有输出的有界Petri网系统的能观性问题.首先,基于矩阵的半张量积,将带有输出的有界Petri网系统的动态行为以线性方程组的形式建立了数学模型.然后,针对初始标识和当前标识,介绍了两种能观性定义.最后,基于矩阵运算建立了关于有界Petri网系统能观性的几个充分必要条件,并给出严格证明.数值算例验证了理论结果.本文提出的方法实现了有界Petri网系统能观性的矩阵运算,易于计算机实现. 相似文献