共查询到19条相似文献,搜索用时 984 毫秒
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研究同时存在双通道数据包丢失和时变时延的Delta算子网络控制系统(NCSs)故障检测问题.假定数据包丢失发生在控制器到执行器、传感器至控制器的数据传输过程中,并且利用两个相互独立的伯努利随机变量描述是否发生丢包.将上述的NCSs建模为网络切换系统,提出任意切换律下故障检测滤波器的设计方法.利用线性矩阵不等式(LMIs)方法、Lyapunov-Krasovskii泛函和平均驻留时间等得出所考虑的网络切换系统具备指数均方稳定性的充分条件.证明了所用的网络切换系统满足H∞性能,并推导出了滤波器参数的显式表达.数值仿真结果验证了所提方法的有效性. 相似文献
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研究一类具有测量数据丢失的大系统分散H∞控制器设计问题.针对由个子系统构成的线性离散大系统,假设测量数据丢失满足已知概率的Bernoulli分布,采用线性矩阵不等式方法给出了分散H∞控制器存在的充分条件,所设计的控制器使得闭环系统均方指数稳定,且满足指定的H∞性能指标.通过仿真例子验证了该方法的有效性. 相似文献
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针对一类具有随机时延的网络控制系统(NCSs)周期反馈控制问题,提出一个新颖的马尔可夫随机时滞系统模型.该模型包括一个分段常数广义采样保持函数(PCGSHF)以及一个用于描述网络诱导时延和数据包丢失的马尔可夫链.应用李亚普诺夫方法以及线性矩阵不等式技术得到了闭环 NCSs 随机稳定的充分条件,并给出了状态反馈控制器和 PCGSHF 的设计方法.最后,通过仿真算例验证了设计方法的有效性. 相似文献
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具有对数量化、网络诱导时延和数据包丢失的网络化Lipschitz非线性系统控制器,存在参数摄动问题。为此,设计一种加性非脆弱状态反馈H∞控制器。将数据量化和网络诱导时延对被控系统的影响,转化为系统的不确定参数,网络化控制系统建模为马尔可夫跳变系统。采用Lyapunov稳定性理论和线性矩阵不等式方法,给出网络化Lipschitz非线性系统的加性非脆弱状态反馈H∞控制器存在的充分条件,该非脆弱H∞控制器可通过解线性矩阵不等式求出。仿真结果表明,当控制器存在参数摄动时,与传统控制器相比,非脆弱控制器不仅能使被控系统稳定,而且满足设定的H∞性能指标。 相似文献
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研究了不确定离散时滞网络系统的鲁棒H∞控制问题。在假设数据丢失过程是一个独立同分布过程的情况下,运用随机Lyapunov函数方法,得到了网络化系统均方渐近稳定且满足给定H∞性能指标的充分条件,并利用线性矩阵不等式方法给出镇定控制器的设计,仿真表明该方法的有效性。 相似文献
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Fuwen Yang 《Asian journal of control》2013,15(5):1468-1476
The problem of quantized H∞ control for networked control systems (NCSs) subject to time‐varying delay and multiple packet dropouts is investigated in this paper. Both the control input and the measurement output signals are quantized before being transmitted and the quantized errors are described as sector bound uncertainties. The measurement channel and the control channel packet dropouts are considered simultaneously, and the stochastic variables satisfying Bernoulli random binary distribution are utilized to model the random multiple packet dropouts. Sufficient conditions for the existence of an observer‐based controller are established to ensure the exponential mean‐square stablility of the closed‐loop system and achieve the optimal H∞ disturbance attenuation level. By using a globally convergent algorithm involving convex optimization, the nonconvex feasibility can be solved successfully. Finally, a numerical example is given to illustrate the effectiveness and applicability of the proposed method. 相似文献
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不确定非线性网络化系统的鲁棒H_∞控制 总被引:1,自引:1,他引:0
用T-S(Takagi-Sugeno)模糊方法研究了带有参数不确定的非线性网络化系统的鲁棒控制.首先,考虑到诱导时延和数据丢包等网络因素的影响,基于事件驱动的保持器的更新序列建立闭环反馈系统的采样模型,并将其转化为状态中附加两个时滞变量的连续T-S模糊系统.然后,利用时滞系统方法,分析不确定闭环模糊系统的鲁棒H∞性能,并设计相应的鲁棒H∞模糊控制器.最后,仿真例子表明了方法的有效性. 相似文献
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基于T-S模糊模型非线性网络控制系统改进H∞跟踪控制 总被引:1,自引:0,他引:1
研究一类非线性网络控制系统改进H∞跟踪控制问题, 该类网络控制系统中非线性被控对象和被跟踪对象分别采用Takagi-Sugeno(T-S)模糊模型和线性稳定参考模型描述. 首先通过综合考虑网络中的数据传输时滞和数据丢包影响, 采用输入时滞法和并行分布补偿技术, 建立基于零阶保持器刷新时刻的系统状态跟踪误差模型. 然后利用改进的自由权矩阵方法, 并结合Lyapunov直接法给出系统满足H∞跟踪性能的充分条件以及模糊控制器的设计方法. 最后仿真实例表明本文方法的有效性和相比已有方法的优越性. 相似文献
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Non-fragile state feedback H-infinity control for discrete-time systems with quantized signals 总被引:1,自引:0,他引:1
This paper presents a study on the problem of non-fragile state feedback H-infinity controller design for linear discrete-time systems with quantized signals. The quantizers considered here are dynamic and time-varying. With the consideration of controller gain variations and quantized signals at the same time, a new non-fragile H-infinity control strategy is proposed with updating quantizer's parameters, such that the quantized closed-loop system is asymptotically stable and with a prescribed H-infinity performance bound. An example is presented to illustrate the effectiveness of the proposed control strategy. 相似文献
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This paper considers the stochastic optimal control problem for networked control systems(NCSs)with control packet dropouts.The proportional plus up to the third-order derivative(PD3)compensation strategy is adopted to compensate for control packet dropouts at the actuator by using the past control packets stored in the buffer.Based on the strategy,a new NCS structure model with packet dropouts is provided,where the packet dropout is assumed to obey the Bernoulli random binary distribution.In terms of the given model,the stochastic optimal control law is proposed. Numerical examples illustrate the effectiveness of the results. 相似文献
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Event‐triggered predictive control for networked control systems with network‐induced delays and packet dropouts 下载免费PDF全文
This paper presents an event‐triggered predictive control approach to stabilize a networked control system subject to network‐induced delays and packet dropouts, for which the states are not measurable. An observer‐based event generator is first designed according to the deviation between the state estimation at the current time and the one at the last trigger time. A predictive control scheme with a selector is then proposed to compensate the effect of network‐induced delays and packet dropouts. Sufficient conditions for stabilization of the networked control system are derived by solving linear matrix inequalities and the corresponding gains of the controller and the observer are obtained. It is shown that the event‐triggered implementation is able to realize reduction in communication and save bandwidth resources of feedback channel networks. A simulation example of an inverted pendulum model illustrates the efficacy of the proposed scheme. 相似文献
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In this paper, we consider the design of interconnected H-infinity feedback control systems with quantized
signals. We assume that a decentralized static output feedback has been designed for an interconnected continuous-time
LTI system so that the closed-loop system is stable and a desired H-infinity disturbance attenuation level is achieved, and
that the subsystems’ measurement outputs are quantized before they are passed to the local controller. We propose a localoutput-
dependent strategy for updating the quantizers’ parameters, so that the overall closed-loop system is asymptotically
stable and achieves the same H-infinity disturbance attenuation level. Both the pre-designed controllers and the quantizers’
parameters are constructed in a decentralized manner, depending on local information. 相似文献