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线性广义时滞系统的状态反馈H∞控制 总被引:2,自引:0,他引:2
首先利用线性矩阵不等式(LMI)方法,给出线性广义时滞系统稳定的一个充分条件;然后讨论广义时滞系统的H_∞状态反馈控制,给出控制器存在的充分条件,同时给出控制器的设计.控制器可由矩阵不等式解得。 相似文献
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研究一类广义时滞系统的输出反馈无源控制问题。利用线性矩阵不等式,给出广义时滞系统容许(即正则、稳定、无脉冲)且严格无源的充分条件,在此基础上给出静态输出反馈控制器,保证闭环系统容许且严格无源的充分条件,并且利用矩阵不等式的解设计相应的输出反馈控制器,提供一个算例说明结论的有效性。 相似文献
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针对带有耗散不确定性的时滞双线性广义系统的鲁棒耗散控制问题,首先将耗散不确定性引入双线性广义系统,利用线性矩阵不等式方法给出系统鲁棒稳定且严格耗散的充分条件;然后利用线性矩阵不等式的解,构造出闭环系统鲁棒耗散的状态反馈控制器;最后通过数值算例验证了所得结论的可行性. 相似文献
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考虑了不确定离散时滞系统经动态输出反馈的保性能控制器设计问题.利用离散时滞系统的广义系统表示形式以及有关向量交叉乘积项的界的处理方法,以线性矩阵不等式的形式,给出了一个时滞依赖的保性能输出反馈控制器存在的充分条件.一个数值例子说明了所给方法的有效性. 相似文献
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利用线性矩阵不等式(LMI)方法,研究被控对象与控制器同时存在摄动的H∞保性能控制问题。针对控制器存在加法式摄动情形,以线性矩阵不等式约束条件给出了广义系统弹性H∞保性能的充分条件,并以线性矩阵不等式的可行解给出了相应的控制器设计方法。通过求解具有线性矩阵不等式约束的凸优化问题,给出了弹性H∞最优保性能及最优H∞性能控制器的设计方法。仿真表明了方法的可行性。 相似文献
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For the systemdot{w} = Sw wherew = (xover{z}) , this note states and proves necessary and sufficient conditions under which a)z is an estimate of a linear function ofx (i.e.,z estimatesTx ), or b) a linear function ofz is an estimate ofx (i.e.,Vz estimatesx ). The mappingT has been used previously by the authors to compute the estimator-controller form of a compensator whose state vectorz had the same dimension as the plant state vectorx . 相似文献
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N. M. Constantinescu 《Soft Computing - A Fusion of Foundations, Methodologies and Applications》2016,20(3):841-851
The aim of this paper is the study of some classes of state filters of a state pseudo BL-algebra. The concepts of minimal prime state filter and of state hyperarchimedean pseudo BL-algebra are introduced and a characterization of a state hyperarchimedean pseudo BL-algebra is presented. Also, we define the notion of a state radical of a state filter of a state pseudo BL-algebra, we present a characterization of a state radical and some of its properties. The algebra of state radicals of a state pseudo BL-algebra is studied. 相似文献
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Christophe Fiter Laurentiu Hetel Wilfrid Perruquetti Jean-Pierre Richard 《Automatica》2012,48(8):1860-1867
In this work, a new state-dependent sampling control enlarges the sampling intervals of state feedback control. We consider the case of linear time invariant systems and guarantee the exponential stability of the system origin for a chosen decay rate. The approach is based on LMIs obtained thanks to sufficient Lyapunov–Razumikhin stability conditions and follows two steps. In the first step, we compute a Lyapunov–Razumikhin function that guarantees exponential stability for all time-varying sampling intervals up to some given bound. This value can be used as a lower-bound of the state-dependent sampling function. In a second step, an off-line computation provides a mapping from the state-space into the set of sampling intervals: the state is divided into a finite number of regions, and to each of these regions is associated an allowable upper-bound of the sampling intervals that will guarantee the global (exponential or asymptotic) stability of the system. The results are based on sufficient conditions obtained using convex polytopes. Therefore, they involve some conservatism with respect to necessary and sufficient conditions. However, at each of the two steps, an optimization on the sampling upper-bounds is proposed. The approach is illustrated with numerical examples from the literature for which the number of actuations is shown to be reduced with respect to the periodic sampling case. 相似文献
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Yi-you Nie Yuan-hua Li Jun-chang Liu Ming-huang Sang 《Quantum Information Processing》2011,10(5):603-608
We demonstrate that a four-qubit cluster state can be used to realize the deterministic quantum state sharing (QSTS) of an
arbitrary four-qubit GHZ-type state among three parties by introducing three ancillary qubits and performing three controlled-NOT
operations. In our scheme, any one of the two agents has the ability to reconstruct the original state if he/she collaborates
with the other one, whilst individual agent obtains no information. 相似文献
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Sezer Gören Author Vitae F. Joel Ferguson Author Vitae 《Computers & Electrical Engineering》2007,33(1):58-69
State reduction of incompletely specified finite state machines (ISFSMs) is an important task in optimization of sequential circuit design and known as an NP-complete problem. Removal of redundant states reduces the logic, because of this, chip area decreases. In addition, test generation is easier when the sequential circuit is irredundant. In this paper, we present a heuristic for state reduction of ISFSMs. The proposed heuristic is based on a branch-and-bound search technique and identification of sets of compatible states of a given ISFSM specification. We have obtained results as good as the best exact method in the literature but with significantly better run-times. 相似文献
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协议状态机可以描述一个协议的行为,帮助理解协议的行为逻辑。面向文本类协议,首先利用统计学方法提取表示报文类型的语义关键字;然后利用邻接矩阵描述报文类型之间的时序关系,基于时序关系进行协议状态标注,构建出协议的状态转换图。实验表明,该方法可以正确地描述出报文类型的时序关系,抽象出准确的状态机模型。 相似文献
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Finite State Machines (FSMs) are used in diverse areas to model hardware and software systems. Verification of FSMs is essential to ensure reliability of systems. To verify that a machine is in an expected state in testing, Unique Input/Output (UIO) sequences are used. The aforementioned testing methodology requires that each state in the FSM has an UIO. However, it is possible for a given machine that few or even none of its states have an UIO sequence. This paper presents a guided heuristic algorithm for synthesizing FSMs such that each state has an UIO sequence. The states of an FSM with identical I/O labels on transitions are grouped in order to identify the states which do not possess UIO sequence. The transitions are then augmented by adding extra output terminals incrementally so that new UIO sequences are created for the states. A greedy approach is used to optimize the number of added outputs. Initially, the transitions which lead to state convergence (i.e., transitions with identical input/output labels taking a set of states to the same next state) and constrained self-loop (i.e., transitions taking a set of states either to itself or leads to state convergence) are identified since a state with only these transitions will never have a UIO sequence. Extra output terminals are added to the FSM which are used only while testing and the augmented output labels make sure that the states are neither convergent nor has constrained self-loop, thereby ensuring UIO sequence. The proposed algorithm, referred to as AUGP, was tested with a large number of FSMs including the Microelectronics Center of North Carolina (MCNC) FSM benchmarks. The augmented state transition table was used as input to a UIO computation algorithm (developed by the same authors [Ahmad I, et al. IEE Proc Comput Digital Tech 2004;151(2):131]) to check the performance of the augmentation algorithm and the tested FSMs were found to possess UIO sequence for all states. 相似文献
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This correspondence shows the relationship between Kalman-Bucy (K-B) state estimation and blended-model state estimation-a technique used in the aerospace industry. The purpose in presenting this comparison is to aid in the interpretation of the K-B filter when used in a control system and, hopefully, to give the designer a more intuitive "feel" for application of the K-B filter. 相似文献
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This paper is concerned with the identification of discrete-time, time invariant, state affine state space models driven by an independent identically distributed (IID) random input, and in the presence of process and measurement noise. The identification problem is treated using a cumulant based approach. It is shown that the input-output and input-state crosscumulant equations in the time domain have the form of a linear autonomous system. An algorithmic procedure is then developed, for the computation of the unknown system matrices, based on a standard deterministic linear subspace identification algorithm, provided the input signal has some persistent excitation properties. The special case of Gaussian IID input is also examined. The proposed method is computationally very efficient and its accuracy is illustrated by simulations. 相似文献
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本文研宄非最小相位系统的精确跟踪问题.理想情况下,非最小相位系统针对参考轨迹的精确跟踪可以通过非因果稳定逆方法实现,但控制输入需从负无穷处开始作用.而在实际情况下应用非因果稳定逆算法时,控制输入通过延拓提前作用的时间是有限的,只能得到近似的跟踪效果.本文提出了一种基于最优状态转移的非因果稳定逆算法,能够在实际情况下实现非最小相位系统对参考轨迹的精确跟踪,放松了稳定逆方法对系统的初始状态和延拓时间的限制,而且在相同跟踪效果的条件下,比近似稳定逆方法的延拓时间更短.对比仿真结果验证了所提方法的性能. 相似文献