不确定离散时滞系统的鲁棒容错控制

考虑了线性离散时滞系统的容错控制问题,给出了传感器失效时系统具有完整性的一个充分条件,并推广到执行器失效的情况。在此基础上得到了更接近实际系统的不确定时滞离散系统问题,给出鲁棒容错控制时滞系统的设计方法和步骤,并用实例验证了所给方法的有效性。     

Stochastic Optimal Control Problem in Advertising Model with Delay

This paper investigates the optimal control problem arising in advertising model with delay. The authors reformulate the problem in Hilbert space by stochastic evolution equation and consider the optimal control problem of controlled stochastic evolution system. The necessary and sufficient optimality conditions of the control are established. The proposed approach is different from most existing studies of optimal advertising policy problem with delay. These results are applied to the optimal advertising policy problem under two different structures and the optimal advertising strategies are obtained.     

结构振动系统的分散化应变控制

针对一类航天器结构振动控制问题,提出了为适应空间地传感器、控制器特殊要求的应变控制方法。考虑到航天器所携带的计算机硬件资源有限。本文研究了大系统分散控制理论在结构振动应变控制中的应用。建立了结构振动控制分散子系统,设计了分散控制策略,并进行了计算机数值仿真。结果表明方法是有效的。     

虚拟现实系统中的时间延迟问题研究

研究了基于头盔显示器(HMD)的虚拟现实系统中的时间延迟问题。分析了延迟产生的原因,以及其对系统产生的影响。提出利用神经网络预测头部运动,由预测结果更新HMD显示,消除延迟。定义八种类型的头部运动,并选取头部的六自由度数据作为神经网络的训练样本。利用该方法,可以有效地补偿HMD系统中的时间延迟,消除使用者的眩晕感。     

Generalized Consensus of Discrete-Time Multi-Agent Systems with Directed Topology and Communication Delay

Journal of Systems Science and Complexity - Compared with traditional consensus, this paper studies the generalized consensus problem for discrete-time multi-agent systems with directed topology...     

一种新的离散时间系统的变结构控制方法

讨论了基于指数趋近律的变结构控制所存在的问题，分析了指数趋近律中参数的选择对系统状态的趋近特性造成的影响，提出了改进的离散变结构控制方案，该方案保证了系统状态在趋近过程中能够始终保持某一趋近特性，易于进行变结构控制设计，加快系统状态趋近速度的同时降低了抖振，仿真结果证明了该方案的有效性。     

The Irregular Linear Quadratic Control Problem for Deterministic Case with Time Delay

This study deals with the irregular linear quadratic control problem governed by continuous time system with time delay. Linear quadratic(LQ) control for irregular Riccati equation with time delay remains challenging since the controller could not be solved from the equilibrium condition directly. The merit of this paper is that based on a new approach of ‘two-layer optimization', the controller entries of irregular case with time delay are deduced from two equilibrium conditions in two different layers, which is fundamentally different from the classical regular LQ control. The authors prove that the irregular LQ with time delay is essentially different from the regular case. Specifically,the predictive controller bases on the feedback gain matrix and the state is given in the last part. The presented conclusions are completely new to our best knowledge. Examples is presented to show the effectiveness of the proposed approach.     

Linear Quadratic Regulation for Discrete-Time Systems with Input Delay: Spectral Factorization Approach

The infinite-horizon linear quadratic regulation （LQR） problem is settled for discretetime systems with input delay. With the help of an autoregressive moving average （ARMA） innovation model, solutions to the underlying problem are obtained. The design of the optimal control law involves in resolving one polynomial equation and one spectral factorization. The latter is the major obstacle of the present problem, and the reorganized innovation approach is used to clear it up. The calculation of spectral factorization finally comes down to solving two Riccati equations with the same dimension as the original systems.     

具有非匹配不确定性相似组合系统的分散鲁棒控制

针对一类具有非匹配不确定性的相似组合系统 ,基于块控原理提出了一种变结构控制设计方法。不确定项存在于各子系统的互联项中 ,可以是非线性的或时变的 ,不满足匹配条件 ,但有界 ;利用反演设计方法来处理系统中的非匹配不确定性 ,再用变结构控制方法来改善系统的性能 ;然后 ,利用Lyapunov稳定性定理证明了闭环系统的信号为最终一致有界且系统的状态收敛于滑模超平面的邻域。最后 ,用一个仿真实例证明了所提出的方法的正确性和有效性。     

Optimal Control of Unknown Discrete-Time Linear Systems with Additive Noise

The optimal control problem with a long run average cost is investigated for unknown linear discrete-time systems with additive noise. The authors propose a value iteration-based stochastic adaptive dynamic programming(VI-based SADP) algorithm, based on which the optimal controller is obtained. Different from the existing relevant work, the algorithm does not need to estimate the expectation(conditional expectation) and variance(conditional variance) of states or other relevant variables, and th...     

飞行/推进综合系统分散控制设计与仿真研究

对飞行/推进综合系统分散控制如何保持集中式控制性能的问题,研究了一种分散控制系统设计方法.首先设计集中式控制器使系统达到最优性能,以此作为性能参考,然后引入分散控制结构处理飞机与发动机之间的耦合作用,对其中的接口变量选取问题进行了分析,给出了分散控制系统的设计步骤,最后通过仿真验证了这种设计方法可以使分散控制具有与集中式控制相同的指令跟踪和解耦性能.     

Distributed Event-Triggered Tracking Control of Heterogeneous Discrete-Time Multi-Agent Systems with Unknown Parameters

In this paper, a novel design framework is developed to solve the cooperative tracking problem of heterogeneous discrete-time multi-agent systems with unknown agent parameters and directed communication topologies. First, a distributed event-triggered observer is developed to handle the heterogeneity of the multi-agent systems. An event-triggering mechanism is proposed to reduce the amount of data transmission between neighboring agents. Then, based on the proposed observer, a discrete-time distributed model reference adaptive controller is presented to deal with the unknown parameters of the multi-agent systems. It is shown that by using the proposed observer and the model reference adaptive controller, the proposed design framework could achieve output tracking of the unknown multi-agent systems for any communication graph containing a directed spanning tree. Finally, an example is presented to illustrate the effectiveness of the proposed controller.

     

广义分散控制系统的闭环正则性

分别从静态分散输出反馈、动态分散输出反馈和混合型分散输出反馈的角度讨论了广义分散控制系统的闭环正则性问题，相应得到了广义分散控制系统在这种不贩馈形式下可闭环正则的判别条件及相互关系.     

水发汗温度场控制问题的解

本文研究水发汗温度场控制模型导出的自由边界问题。在具有表面烧蚀的情形，证明了该问题解是存在唯一的。     

Stabilization of Discrete-Time Dynamical Systems Under Event-Triggered Impulsive Control with and Without Time-Delays

This paper investigates the issue of stabilization for discrete-time dynamical systems (DDS) by event-triggered impulsive control (ETIC). Based on some relatively simple threshold constants, three levels of event conditions are set and thus the ETIC scheme is designed. Three cases for ETIC with and without time-delays and data dropouts are studied respectively, and the criteria on exponential stability are derived for the controlled DDS. The stabilization in the form of exponential stability is achieved for DDS under the designed ETIC with or without time-delays. And in the case of the ETIC data dropouts, the conditions of exponential stabilization are derived for DDS and the maximal allowable dropout rates for ETIC are estimated. Finally, one example with numerical simulations is worked out for illustration.     

基于模糊逻辑系统的复杂相似系统分散全息控制设计

针对复杂系统提出信息库的概念，以此为基础描述了复杂相似系统的概念。针对一类具有相似结构的、由二维子系统组成的复杂系统，采用经典Lyapunov方法和模糊逻辑系统，充分利用相似结构信息和匹配系数，分别给出了设计被控复杂系统镇定和跟踪分散全息控制器的方法。实例仿真结果表明本文所提出的方法是有效的。     

Fuzzy-Gray预测控制算法及应用

针对大滞后系统的控制 ,本文提出了一种带智能积分的参数自调整 Fuzzy-Gray预测控制算法 .该算法综合 Fuzzy控制、Gray预测的长处 ,对大滞后系统进行控制是有效的 .仿真结果表明该算法能较好地兼顾系统的动、静态特性 ,超调小、响应快 ,稳态精度高 ,在工业控制系统中有实用价值 .     

一类非线性离散系统的自适应控制

针对一类非线性离散系统 ,利用 Lyapunov方法和加权最小二乘估计设计了一种自适应控制器 ,在对非线性 (不加增长条件约束 )的情况下 ,得到了闭环系统的全局跟踪性能 .     

Finite Time Consensus Problem for Multiple Non-Holonomic Agents with Communication Delay

In this paper, finite time consensus problem is discussed for multiple non-holonomic mobile agents with constant communication delay. The objective is to design non-smooth distributed control laws such that multiple non-holonomic mobile agents can be all in agreement within any given finite time larger than communication delay. The authors propose a novel switching control strategy with the help of Lyapunov-based method and graph theory.     

Decentralized Control for Similar Composite Systems with Interconnections Satisfying Interconnected Condition

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