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时滞系统的多步预报控制 总被引:5,自引:0,他引:5
本文针对具有模型不确定性的时变大时滞系统,提出一种带监测及切换系统的多步预报控制算法。该方法的主要设计思想是对系统在包括时滞范围在内的未来时刻的输出作出预报,依此预报值进行滚动优化和闭环极点配置,同时,增加一层监测及切换系统,以保证整个系统的稳定性。理论分析及仿真实验表明,该方法能有效地用于时变大时滞对象的控制,是一种鲁棒性好的控制算法。 相似文献
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考虑一类广义时滞系统的状态反馈H∞控制问题,目的是设计状态反馈控制律,使得闭环系统渐近稳定,且满足一定的H∞性能指标,控制律的设计只需求解一组LMI。数值算例说明了所给方法的有效性。 相似文献
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针对具有时滞的不确定关联大系统,研究了状态反馈控制器的设计问题。当时滞常数未知时,给出了对时滞参数的自适应控制方案。建立了可由线性矩阵不等式(LMI)表示的镇定条件。最后给出了仿真实例以说明该方法的有效性。 相似文献
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滑模控制一类非线性分布式时滞系统 总被引:1,自引:0,他引:1
针对一类状态不可测的非线性不确定分布式时滞系统, 给出了系统滑动模态鲁棒渐近稳定的充分条件. 设计了一类滑模观测器, 同时采用线性矩阵不等式的处理方法给出了该观测器存在的充分条件. 再应用滑模控制的趋近率方法和基于观测器所得到的估计状态, 综合了一类滑模控制器. 该控制器同时保证了估计状态下的滑模面和估计误差状态下的滑模面的渐近可达性. 相似文献
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发动机由怠速工况向启动工况转换时的输出扭矩信息直接影响离合器接合过程的平顺特性。针对发动机自身和控制环节带来的时间滞后对系统性能的影响,研究了含有时滞信息的鲁棒H_∞状态反馈控制规律,使干扰信息作用下的发动机怠速工况的转速恒定且满足H_∞性能要求。进一步设计了H_∞滤波器在线估计发动机怠速时输出扭矩,为离合器的接合控制提供力矩信息。基于Simulink搭建发动机怠速系统仿真验证估计器的有效性,结果表明在扰动量出现和消失瞬间,提出的算法能保证电子节气门开度切换小,控制转速能快速稳定,且有效估计了发动机怠速时的输出扭矩,克服了时间滞后带来的性能下降的问题。 相似文献
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This paper develops an adaptive state feedback coordinated decentralized control scheme for a class of dynamic systems with state delay in subsystems and in the interconnections and in the presence of unknown actuator failures in each subsystem. The main contributions of this paper are the development of a new controller parametrization which attempt to anticipate the future states and failures, the introduction of an appropriate Lyapunov‐Krasovskii type functional to design the adaptation algorithms, and a stability proof. 相似文献
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In this paper, robust stochastic stabilization and H∞ control for a class of uncertain discrete‐time linear systems with Markovian jumping parameters are considered. Based on a new bounded real lemma derived upon an inequality recently proposed, a new iterative state‐feedback controller design procedure for discrete time‐delay systems is presented. Sufficient conditions for stochastic stabilization are derived in the form of linear matrix inequalities (LMIs) based on an equivalent model transformation, and the corresponding H∞ control law is given. Finally, numerical examples are given to illustrate the solvability of the problems and effectiveness of the results. 相似文献
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本文研究了一种具有变质量负载的双连杆机械臂结构的振动反馈控制.利用刚体动力学方法计算了随时间变化的惯性力,包括伺服电机、端点时变质量负载和连杆分布质量引起的惯性力.基于有限元理论建立了双连杆-变质量结构的动力学模型,并使用Bathe法求解该时变系统动力学方程,根据响应分析了质量变化对系统动力学特性的影响,发现当质量改变... 相似文献
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This paper deals with the problem of stability and robust control for both certain and uncertain continuous‐time singular systems with state delay. Systems with norm‐bounded parameter uncertainties are considered. Robust delay‐dependent stability criteria and linear memoryless state feedback controllers based on linear matrix inequality are obtained. By choosing some Lyapunov‐Krasovskii functionals, neither model transformation nor bounding for cross terms is required in the derivation of our delay‐dependent results. Finally, numerical example is provided to illustrate the effectiveness of the proposed method. 相似文献
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This paper analyses control computation latency and jitter, which have been largely ignored in the control community for real‐time (RT) control. The focus is on RT control systems with multiple control tasks running on a uniprocessor. Three strategies are proposed to reduce control latency and/or jitter: introduction of offsets into control task scheduling, decomposition of control tasks; and increasing the priority levels of output subtasks. Examples are given to demonstrate the effectiveness of the proposed methods. 相似文献
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Random transfer delays in network‐based control systems (NCSs) degrade the control performance and can even destabilize the control system. To address this problem, the adaptive dynamic matrix control (DMC) algorithm is proposed. The control algorithm is derived by applying the philosophy behind DMC to a discrete time‐delay model. A method to estimate the network‐induced delays is also presented to facilitate implementation of the control algorithm. Finally, an NCS platform based on the TrueTime simulator is constructed. With it, the adaptive DMC algorithm is compared with the conventional DMC algorithm under different network conditions. Simulation results show that the proposed adaptive DMC algorithm can respond to various network conditions adaptively and achieve better control performance for NCSs with random transfer delays. 相似文献
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建立了多组多滞后区间系数时变非线性控制系统的结构概念,采用刘永清建立的鲁棒镇定的等价法,给出了具有扰动结构参数的多组多滞后区间系数时变非线性关联控制系统的结构与关联鲁棒镇定,同时给出了扰动参数与滞后非线性项界限的估计公式 相似文献