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VERTICAL NONCONTACT POSITIONING H_∞ ROBUST CONTROL FOR MAGNETICALLY LEVITATED SURFACE MOTOR
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作者 TAO Tao HAO Xiaohong +2 位作者 MEI Xuesong JIANG Gedong ZHANG Dongsheng 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2008年第1期82-86,共5页
To fulfill the stringent requirement, super-precision positioning and ultra cleanness, a surface motor with the integrated chip fabrication equipment is constructed by using permanent magnets and electromagnet coils a... To fulfill the stringent requirement, super-precision positioning and ultra cleanness, a surface motor with the integrated chip fabrication equipment is constructed by using permanent magnets and electromagnet coils as primary actuating components. It consists of stator and mover, and the mover is isolated from the stator by the magnetic beating. The magnetic bearing in the stator is composed of eight air core electromagnet coils, the propulsion in the stator is composed of iron core and electromagnetic coils, and the mover is composed of NdFeB permanent magnets and levitated stage. Based on Lorentz law, some parameters, including permanent magnets dimensions, currents and levitation height, which may affect the stability, are analyzed and optimized. To improve the positioning accuracy in the vertical direction of the magnetic levitation surface motor, a robust controller is proposed using H∞ mixed sensitivity control theory. The simulation results show that by choosing appropriate weight functions, the controller can ensure the robustness of the closed loop system under the presence of uncertainties, and the H∞ robust controller is excellent for reducing steady error and increasing response speed. 展开更多
关键词 Magnetic levitation Surface motor Ultra-precision positioning robust control
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Nonlinear robust adaptive control for bidirectional stabilization system of all-electric tank with unknown actuator backlash compensation and disturbance estimation
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作者 Shusen Yuan Wenxiang Deng +1 位作者 Jianyong Yao Guolai Yang 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第2期144-158,共15页
Since backlash nonlinearity is inevitably existing in actuators for bidirectional stabilization system of allelectric tank,it behaves more drastically in high maneuvering environments.In this work,the accurate trackin... Since backlash nonlinearity is inevitably existing in actuators for bidirectional stabilization system of allelectric tank,it behaves more drastically in high maneuvering environments.In this work,the accurate tracking control for bidirectional stabilization system of moving all-electric tank with actuator backlash and unmodeled disturbance is solved.By utilizing the smooth adaptive backlash inverse model,a nonlinear robust adaptive feedback control scheme is presented.The unknown parameters and unmodelled disturbance are addressed separately through the derived parametric adaptive function and the continuous nonlinear robust term.Because the unknown backlash parameters are updated via adaptive function and the backlash effect can be suppressed successfully by inverse operation,which ensures the system stability.Meanwhile,the system disturbance in the high maneuverable environment can be estimated with the constructed adaptive law online improving the engineering practicality.Finally,Lyapunov-based analysis proves that the developed controller can ensure the tracking error asymptotically converges to zero even with unmodeled disturbance and unknown actuator backlash.Contrast co-simulations and experiments illustrate the advantages of the proposed approach. 展开更多
关键词 Bidirectional stabilization system robust control Adaptive control Backlash inverse Disturbance estimation
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The prediction of projectile-target intersection for moving tank based on adaptive robust constraint-following control and interval uncertainty analysis
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作者 Cong Li Xiuye Wang +2 位作者 Yuze Ma Fengjie Xu Guolai Yang 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第1期351-363,共13页
To improve the hit probability of tank at high speed,a prediction method of projectile-target intersection based on adaptive robust constraint-following control and interval uncertainty analysis is proposed.The method... To improve the hit probability of tank at high speed,a prediction method of projectile-target intersection based on adaptive robust constraint-following control and interval uncertainty analysis is proposed.The method proposed provides a novel way to predict the impact point of projectile for moving tank.First,bidirectional stability constraints and stability constraint-following error are constructed using the Udwadia-Kalaba theory,and an adaptive robust constraint-following controller is designed considering uncertainties.Second,the exterior ballistic ordinary differential equation with uncertainties is integrated into the controller,and the pointing control of stability system is extended to the impact-point control of projectile.Third,based on the interval uncertainty analysis method combining Chebyshev polynomial expansion and affine arithmetic,a prediction method of projectile-target intersection is proposed.Finally,the co-simulation experiment is performed by establishing the multi-body system dynamic model of tank and mathematical model of control system.The results demonstrate that the prediction method of projectile-target intersection based on uncertainty analysis can effectively decrease the uncertainties of system,improve the prediction accuracy,and increase the hit probability.The adaptive robust constraint-following control can effectively restrain the uncertainties caused by road excitation and model error. 展开更多
关键词 Tank stability control Constraint-following Adaptive robust control Uncertainty analysis Prediction of projectile-target intersection
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Adaptive Robust Servo Control for Vertical Electric Stabilization System of Tank and Experimental Validation
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作者 Darui Lin Xiuye Wang +1 位作者 Yimin Wang Guolai Yang 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第1期326-342,共17页
A tracking stability control problem for the vertical electric stabilization system of moving tank based on adaptive robust servo control is addressed.This paper mainly focuses on two types of possibly fast timevaryin... A tracking stability control problem for the vertical electric stabilization system of moving tank based on adaptive robust servo control is addressed.This paper mainly focuses on two types of possibly fast timevarying but bounded uncertainty within the vertical electric stabilization system:model parameter uncertainty and uncertain nonlinearity.First,the vertical electric stabilization system is constructed as an uncertain nonlinear dynamic system that can reflect the practical mechanics transfer process of the system.Second,the dynamical equation in the form of state space is established by designing the angular tracking error.Third,the comprehensive parameter of system uncertainty is designed to estimate the most conservative effects of uncertainty.Finally,an adaptive robust servo control which can effectively handle the combined effects of complex nonlinearity and uncertainty is proposed.The feasibility of the proposed control strategy under the practical physical condition is validated through the tests on the experimental platform.This paper pioneers the introduction of the internal nonlinearity and uncertainty of the vertical electric stabilization system into the settlement of the tracking stability control problem,and validates the advanced servo control strategy through experiment for the first time. 展开更多
关键词 Adaptive robust servo control Experimental validation Nonlinearity compensation System uncertainty Vertical electric stabilization system
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Novel Adaptive Memory Event-Triggered-Based Fuzzy Robust Control for Nonlinear Networked Systems via the Differential Evolution Algorithm
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作者 Wei Qian Yanmin Wu Bo Shen 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2024年第8期1836-1848,共13页
This article mainly investigates the fuzzy optimization robust control issue for nonlinear networked systems characterized by the interval type-2(IT2)fuzzy technique under a differential evolution algorithm.To provide... This article mainly investigates the fuzzy optimization robust control issue for nonlinear networked systems characterized by the interval type-2(IT2)fuzzy technique under a differential evolution algorithm.To provide a more reasonable utilization of the constrained communication channel,a novel adaptive memory event-triggered(AMET)mechanism is developed,where two event-triggered thresholds can be dynamically adjusted in the light of the current system information and the transmitted historical data.Sufficient conditions with less conservative design of the fuzzy imperfect premise matching(IPM)controller are presented by introducing the Wirtinger-based integral inequality,the information of membership functions(MFs)and slack matrices.Subsequently,under the IPM policy,a new MFs intelligent optimization technique that takes advantage of the differential evolution algorithm is first provided for IT2 TakagiSugeno(T-S)fuzzy systems to update the fuzzy controller MFs in real-time and achieve a better system control effect.Finally,simulation results demonstrate that the proposed control scheme can obtain better system performance in the case of using fewer communication resources. 展开更多
关键词 Adaptive memory event-triggered(AMET) differential evolution algorithm fuzzy optimization robust control interval type-2(IT2)fuzzy technique.
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Adaptive Robust Control with Leakage-Type Control Law for Trajectory Tracking of Exoskeleton Robots
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作者 Jin Tian Xiulai Wang +1 位作者 Ningling Ma Yutao Zhang 《Advances in Internet of Things》 2024年第3期53-66,共14页
This paper investigates the trajectory following problem of exoskeleton robots with numerous constraints. However, as a typical nonlinear system with variability and parameter uncertainty, it is difficult to accuratel... This paper investigates the trajectory following problem of exoskeleton robots with numerous constraints. However, as a typical nonlinear system with variability and parameter uncertainty, it is difficult to accurately achieve the trajectory tracking control for exoskeletons. In this paper, we present a robust control of trajectory tracking control based on servo constraints. Firstly, we consider the uncertainties (e.g., modelling errors, initial condition deviations, structural vibrations, and other unknown external disturbances) in the exoskeleton system, which are time-varying and bounded. Secondly, we establish the dynamic model and formulate a close-loop connection between the dynamic model and the real world. Then, the trajectory tracking issue is regarded as a servo constraint problem, and an adaptive robust control with leakage-type adaptive law is proposed with the guaranteed Lyapunov stability. Finally, we conduct numerical simulations to verify the performance of the proposed controller. 展开更多
关键词 Trajectory Tracking Adaptive robust control Exoskeleton Robots UNCERTAINTIES
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Robust Nonlinear Current Sensorless Control of the Boost Converter with Constant Power Load
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作者 Said Oucheriah Abul Azad 《Circuits and Systems》 2024年第3期29-43,共15页
The boost converter feeding a constant power load (CPL) is a non-minimum phase system that is prone to the destabilizing effects of the negative incremental resistance of the CPL and presents a major challenge in the ... The boost converter feeding a constant power load (CPL) is a non-minimum phase system that is prone to the destabilizing effects of the negative incremental resistance of the CPL and presents a major challenge in the design of stabilizing controllers. A PWM-based current-sensorless robust sliding mode controller is developed that requires only the measurement of the output voltage. An extended state observer is developed to estimate a lumped uncertainty signal that comprises the uncertain load power and the input voltage, the converter parasitics, the component uncertainties and the estimation of the derivative of the output voltage needed in the implementation of the controller. A linear sliding surface is used to derive the controller, which is simple in its design and yet exhibits excellent features in terms of robustness to external disturbances, parameter uncertainties, and parasitics despite the absence of the inductor’s current feedback. The robustness of the controller is validated by computer simulations. 展开更多
关键词 Boost Converter robust Sliding Mode control Constant Power Load (CPL) Current-Sensorless control Extended State Observer
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Robustness-tracking control based on sliding mode and H_∞ theory for linear servo system 被引量:1
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作者 田艳丰 郭庆鼎 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2005年第2期213-217,共5页
A robustness-tracking control scheme based on combining H_∞ robust control and sliding mode control is proposed for a direct drive AC permanent-magnet linear motor servo system to solve the conflict between tracking ... A robustness-tracking control scheme based on combining H_∞ robust control and sliding mode control is proposed for a direct drive AC permanent-magnet linear motor servo system to solve the conflict between tracking and robustness of the linear servo system. The sliding mode tracking controller is designed to ensure the system has a fast tracking characteristic to the command, and the H_∞ robustness controller suppresses the disturbances well within the close loop(including the load and the end effect force of linear motor etc.) and effectively minimizes the chattering of sliding mode control which influences the steady state performance of the system. Simulation results show that this control scheme enhances the track-command-ability and the robustness of the linear servo system, and in addition, it has a strong robustness to parameter variations and resistance disturbances. 展开更多
关键词 permanent-magnet linear synchronous motor sliding mode control h_∞ robust control DIRECT-DRIVE end-effect
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重放攻击下多智能体系统H_(∞)一致性PID控制
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作者 宋金波 董宏丽 +1 位作者 申雨轩 侯男 《控制理论与应用》 EI CAS CSCD 北大核心 2024年第4期658-666,共9页
本文针对一类带有加性噪声和乘性噪声的离散多智能体系统,研究重放攻击下多智能体系统的H_(∞)一致性比例-积分-微分(PID)控制问题.首先,根据智能体的测量输出设计状态观测器,对智能体的状态进行有效估计,观测器设计过程中考虑了系统测... 本文针对一类带有加性噪声和乘性噪声的离散多智能体系统,研究重放攻击下多智能体系统的H_(∞)一致性比例-积分-微分(PID)控制问题.首先,根据智能体的测量输出设计状态观测器,对智能体的状态进行有效估计,观测器设计过程中考虑了系统测量输出从传感器传输到观测器过程中受到重放网络攻击的影响.然后,利用智能体与其邻居智能体的估计状态差设计PID控制器.利用李雅普诺夫稳定性理论和代数图论,证明在该控制策略下,多智能体系统在重放攻击存在的情况下达到预期的H_(∞)性能指标.最后,利用线性矩阵不等式(LMI)方法求解观测器和控制器增益,利用数值仿真验证了所设计的观测器和PID控制器的有效性. 展开更多
关键词 多智能体 重放攻击 PID控制 h_(∞)性能 观测器
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非线性系统无需初始条件预设性能有界H_(∞)容错控制
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作者 李小华 程鸿展 刘辉 《控制理论与应用》 EI CAS CSCD 北大核心 2024年第2期273-282,共10页
针对一类具有外部扰动和传感器故障的非线性系统,本文研究了其自适应预设性能有界H_(∞) 容错控制问题.本文提出一种新的预设性能控制设计方法,使得预设性能函数的选择与系统被约束变量的初始状态完全无关,用一种全新的方式解决了传统... 针对一类具有外部扰动和传感器故障的非线性系统,本文研究了其自适应预设性能有界H_(∞) 容错控制问题.本文提出一种新的预设性能控制设计方法,使得预设性能函数的选择与系统被约束变量的初始状态完全无关,用一种全新的方式解决了传统预设性能方法的控制效果依赖被约束变量初始条件的问题.基于该设计方法和有界H_(∞) 控制方法,在未知系统初始条件的情况下获得了系统的自适应预设性能有界H_(∞) 控制器.本文所设计的控制器能够保证系统中的所有信号都是有界稳定的,系统的输出变量能够被预设性能函数约束,并且对于外部干扰具有很好的抑制作用.最后,仿真结果验证了该控制器的可行性及有效性. 展开更多
关键词 非线性系统 传感器故障 预设性能控制 无需初始条件 有界h_(∞)控制 容错控制
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三阶三次幂非线性混沌电路的自适应反馈控制和H_(∞)控制
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作者 付景超 杨阳 《吉林大学学报(理学版)》 CAS 北大核心 2024年第3期713-720,共8页
针对三阶三次幂非线性混沌电路,研究其控制问题.首先,给出系统的Lyapunov指数和混沌吸引子,验证系统存在复杂的混沌现象;其次,用自适应反馈控制方法和H_(∞)状态反馈控制方法,设计参数已知和参数未知的自适应反馈控制器以及H_(∞)状态... 针对三阶三次幂非线性混沌电路,研究其控制问题.首先,给出系统的Lyapunov指数和混沌吸引子,验证系统存在复杂的混沌现象;其次,用自适应反馈控制方法和H_(∞)状态反馈控制方法,设计参数已知和参数未知的自适应反馈控制器以及H_(∞)状态反馈控制器,将混沌系统状态稳定到平衡点上;最后,通过MATLAB软件进行数值仿真验证控制器的有效性,并对两种控制器的控制效果进行比较. 展开更多
关键词 三次幂非线性混沌电路 自适应反馈控制 h_(∞)状态反馈控制 LYAPUNOV指数
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基于改进粒子群优化权函数的直流微电网H_(∞)控制策略
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作者 马文忠 王源航 +3 位作者 高健壹 李维国 么旻蕊 黄建伟 《现代电力》 北大核心 2024年第3期431-440,共10页
直流微电网中常常含有恒功率负载(constant power loads,CPLs),其负阻抗特性会降低系统的稳定性,造成直流母线电压波动甚至崩溃。因此,首先建立了直流微电网的小信号模型,使用根轨迹法分析了恒功率负载对系统稳定性的影响;其次提出一种... 直流微电网中常常含有恒功率负载(constant power loads,CPLs),其负阻抗特性会降低系统的稳定性,造成直流母线电压波动甚至崩溃。因此,首先建立了直流微电网的小信号模型,使用根轨迹法分析了恒功率负载对系统稳定性的影响;其次提出一种基于混合灵敏度优化的电压控制策略,提升了直流微电网系统的稳定性,并采用改进粒子群优化(particle swarm optimization,PSO)算法对权函数进行了优化,进一步提升了鲁棒控制器的性能;最后采用Matlab/Simulink仿真算例进行验证,仿真结果表明提出的鲁棒控制器减小了母线电压的波动,有效提升了直流微电网系统的稳定性。 展开更多
关键词 直流微电网 稳定性分析 母线电压 h_(∞)控制 粒子群算法
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具有访问约束和数据丢包的网络化系统H_(∞)鲁棒控制
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作者 祝超群 姚兴启 《兰州理工大学学报》 CAS 北大核心 2024年第5期86-93,共8页
针对同时存在访问约束和数据丢包的网络化控制系统,研究了H_(∞)鲁棒控制方法的设计问题.首先,采用Bernoulli随机过程来描述系统的数据丢包过程,并根据介质访问约束的随机访问机制建立了离散时间马尔可夫跳变系统模型;其次,通过Lyapuno... 针对同时存在访问约束和数据丢包的网络化控制系统,研究了H_(∞)鲁棒控制方法的设计问题.首先,采用Bernoulli随机过程来描述系统的数据丢包过程,并根据介质访问约束的随机访问机制建立了离散时间马尔可夫跳变系统模型;其次,通过Lyapunov稳定性理论和LMI技术导出闭环系统随机稳定的充分条件,并设计了相应的H_(∞)鲁棒控制器,使得闭环系统随机稳定并具有给定的H_(∞)性能;最后,通过仿真算例验证了所提控制方案的正确性和有效性. 展开更多
关键词 网络化控制系统 介质访问约束 数据丢包 h_∞鲁棒控制
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具有H_(∞)性能的输入受限三级倒立摆控制器设计
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作者 韩光信 张保葵 《河南科技》 2024年第17期4-9,共6页
【目的】针对直线三级倒立摆控制输入受限下的稳摆控制问题,设计了具有H_(∞)性能的输入受限三级倒立摆控制器。【方法】利用线性矩阵不等式(LMI)方法,将控制输入约束问题转化为利用线性矩阵不等式求解优化值的优化问题,经Lyapunov稳定... 【目的】针对直线三级倒立摆控制输入受限下的稳摆控制问题,设计了具有H_(∞)性能的输入受限三级倒立摆控制器。【方法】利用线性矩阵不等式(LMI)方法,将控制输入约束问题转化为利用线性矩阵不等式求解优化值的优化问题,经Lyapunov稳定性推导出符合条件的LMI,利用MATLAB中的LMI工具箱求解得到有效的K。进一步在控制输入受限下引入H_(∞)性能指标,使所设计的控制输入受限下的算法具有H_(∞)性能。【结果】仿真结果表明,该控制器对于控制输入受限下的复杂高阶次不稳定系统具有很好的控制效果。【结论】控制输入信号在给定的受限范围内实现了三级倒立摆的稳摆要求,且引入H_(∞)性能指标后控制输入和摆杆波动更小。 展开更多
关键词 直线三级倒立摆 控制输入受限 线性矩阵不等式(LMI) h_(∞)性能指标
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Robust Consensus Tracking Control of Uncertain Multi-Agent Systems With Local Disturbance Rejection 被引量:3
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作者 Pan Yu Kang-Zhi Liu +3 位作者 Xudong Liu Xiaoli Li Min Wu Jinhua She 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2023年第2期427-438,共12页
In this paper,a new distributed consensus tracking protocol incorporating local disturbance rejection is devised for a multi-agent system with heterogeneous dynamic uncertainties and disturbances over a directed graph... In this paper,a new distributed consensus tracking protocol incorporating local disturbance rejection is devised for a multi-agent system with heterogeneous dynamic uncertainties and disturbances over a directed graph.It is of two-degree-of-freedom nature.Specifically,a robust distributed controller is designed for consensus tracking,while a local disturbance estimator is designed for each agent without requiring the input channel information of disturbances.The condition for asymptotic disturbance rejection is derived.Moreover,even when the disturbance model is not exactly known,the developed method also provides good disturbance-rejection performance.Then,a robust stabilization condition with less conservativeness is derived for the whole multi-agent system.Further,a design algorithm is given.Finally,comparisons with the conventional one-degree-of-freedombased distributed disturbance-rejection method for mismatched disturbances and the distributed extended-state observer for matched disturbances validate the developed method. 展开更多
关键词 Directed graph distributed control disturbance rejection dynamic uncertainties multi-agent systems robust control
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Constrained Moving Path Following Control for UAV With Robust Control Barrier Function 被引量:1
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作者 Zewei Zheng Jiazhe Li +1 位作者 Zhiyuan Guan Zongyu Zuo 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2023年第7期1557-1570,共14页
This paper studies the moving path following(MPF)problem for fixed-wing unmanned aerial vehicle(UAV)under output constraints and wind disturbances.The vehicle is required to converge to a reference path moving with re... This paper studies the moving path following(MPF)problem for fixed-wing unmanned aerial vehicle(UAV)under output constraints and wind disturbances.The vehicle is required to converge to a reference path moving with respect to the inertial frame,while the path following error is not expected to violate the predefined boundaries.Differently from existing moving path following guidance laws,the proposed method removes complex geometric transformation by formulating the moving path following problem into a second-order time-varying control problem.A nominal moving path following guidance law is designed with disturbances and their derivatives estimated by high-order disturbance observers.To guarantee that the path following error will not exceed the prescribed bounds,a robust control barrier function is developed and incorporated into controller design with quadratic program based framework.The proposed method does not require the initial position of the UAV to be within predefined boundaries.And the safety margin concept makes error-constraint be respected even if in a noisy environment.The proposed guidance law is validated through numerical simulations of shipboard landing and hardware-in-theloop(HIL)experiments. 展开更多
关键词 Moving path following(MPF) robust control barrier function safety margin shipboard landing unmanned aerial vehicle(UAV)
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基于H_(∞)控制器的阀控非对称缸位置伺服系统控制
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作者 李虎山 孙淼 +3 位作者 王猛 高有山 席浩 郝建楠 《机床与液压》 北大核心 2024年第14期7-13,共7页
以阀控非对称缸位置伺服系统为研究对象,建立其数学模型;针对负载突变及油液弹性模量变化提出了H∞鲁棒控制方法,从频域上分析了控制器对系统动态性能和稳态性能的影响。采用AMESim和MATLAB/Simulink搭建了阀控非对称缸位置伺服系统的... 以阀控非对称缸位置伺服系统为研究对象,建立其数学模型;针对负载突变及油液弹性模量变化提出了H∞鲁棒控制方法,从频域上分析了控制器对系统动态性能和稳态性能的影响。采用AMESim和MATLAB/Simulink搭建了阀控非对称缸位置伺服系统的联合仿真模型,对不同工况下控制器的跟踪精度及抗扰能力进行仿真研究。最后,通过油缸加载实验测试平台对仿真结果进行进一步验证。结果表明:所设计的H∞控制器提高了系统的快速性和鲁棒性,相比于PID控制下系统正弦响应结果,H∞控制器的最大跟踪误差在无负载工况下降低了48.8%,在负载突变工况下降低了56.25%;同时阶跃响应时间缩短了7.5%。 展开更多
关键词 位置伺服系统 h∞控制器 非对称缸控制
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数控机床磁悬浮直线同步电动机混合H_(2)/H_(∞)鲁棒控制器设计
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作者 陈泽宇 蓝益鹏 《制造技术与机床》 北大核心 2024年第11期91-96,共6页
针对数控机床磁悬浮直线同步电动机控制系统,提出混合H_(2)/H_(∞)鲁棒控制。首先,考虑不确定H_(∞)扰动以及端部效应等因素建立数控机床磁悬浮直线同步电动机的数学模型。其次,将鲁棒H_(∞)控制与线性矩阵不等式(linear matrix inequal... 针对数控机床磁悬浮直线同步电动机控制系统,提出混合H_(2)/H_(∞)鲁棒控制。首先,考虑不确定H_(∞)扰动以及端部效应等因素建立数控机床磁悬浮直线同步电动机的数学模型。其次,将鲁棒H_(∞)控制与线性矩阵不等式(linear matrix inequality,LMI)相结合,设计一种基于LMI的鲁棒H_(2)/H_(∞)控制器。再次,为提高系统的动态性能,设计基于LMI的混合鲁棒控制器。最后,仿真H_(2)/H_(∞)结果证明在保证系统鲁棒稳定的前提下,混合鲁棒控制可有效提高系统的收敛速度和响应灵敏度。 展开更多
关键词 数控机床磁悬浮直线同步电动机 h_(∞)鲁棒控制 混合h_(2)/h_(∞)鲁棒控制 LMI
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Robust H_∞ control for neutral stochastic uncertain systems with time-varying delay 被引量:3
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作者 Guici Chen Xiaoping Wang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2010年第4期658-665,共8页
The problem of robust H_∞ control for uncertain neutral stochastic systems with time-varying delay is discussed.The parameter uncertaintie is assumed to be time varying norm-bounded.First,the stochastic robust stabil... The problem of robust H_∞ control for uncertain neutral stochastic systems with time-varying delay is discussed.The parameter uncertaintie is assumed to be time varying norm-bounded.First,the stochastic robust stabilization of the stochastic system without disturbance input is investigated by nonlinear matrix inequality method.Then,a full-order stochastic dynamic output feedback controller is designed by solving a bilinear matrix inequality(BMI),which ensures a prescribed stochastic robust H_∞ performance level for the resulting closed-loop system with nonzero disturbance input and for all admissible uncertainties.An illustrative example is provided to show the feasibility of the controller and the potential of the proposed technique. 展开更多
关键词 stochastic robust h_∞ control neutral stochastic system uncertain system stochastic dynamic output feedback controller bilinear matrix inequality(BMI).
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Robust H_∞ Load Frequency Control of Multi-area Power System With Time Delay:A Sliding Mode Control Approach 被引量:6
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作者 Yonghui Sun Yingxuan Wang +2 位作者 Zhinong Wei Guoqiang Sun Xiaopeng Wu 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2018年第2期610-617,共8页
This paper is devoted to investigate the robust H∞sliding mode load frequency control(SMLFC) of multi-area power system with time delay. By taking into account stochastic disturbances induced by the integration of re... This paper is devoted to investigate the robust H∞sliding mode load frequency control(SMLFC) of multi-area power system with time delay. By taking into account stochastic disturbances induced by the integration of renewable energies,a new sliding surface function is constructed to guarantee the fast response and robust performance, then the sliding mode control law is designed to guarantee the reach ability of the sliding surface in a finite-time interval. The sufficient robust frequency stabilization result for multi-area power system with time delay is presented in terms of linear matrix inequalities(LMIs). Finally,a two-area power system is provided to illustrate the usefulness and effectiveness of the obtained results. 展开更多
关键词 Index Terms--Load frequency control (LFC) multi-area powersystem robust control sliding mode control (SMC) time delay.
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