共查询到20条相似文献,搜索用时 15 毫秒
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不确定非线性系统的鲁棒输出反馈自适应控制 总被引:3,自引:1,他引:2
针对一类具有一般不确定性的非线性系统,设计一种新的鲁棒输出反馈自适应控制器。在较弱条件下,该控制器不仅能保证闭环系统全局稳定,且能使跟踪误差以指数速度收敛到零的小领域内。仿真结果验证了所给控制方案的有效性。 相似文献
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变结构局部模型跟踪控制研究 总被引:2,自引:0,他引:2
本文针对线性失配不确定性系统,提出了一种新的模型跟踪概念-局部模型跟踪,基于变结构控制理论,研究了实现此跟踪的系统特定结构和设计方法,并证明了设计中的分离定理以及变结构局部模型跟踪控制系统的最大跟踪能力。本文突破了变结构不变性条件的苛刻限制,大大提高了系统的稳态跟踪特性。 相似文献
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不确定线性系统保代价控制的鲁棒性分析 总被引:9,自引:1,他引:9
研究不确定线性系统保代价控制的鲁棒性分析问题.提出了不确定线性系统保代价控制鲁棒界概念,给出了不确定线性系统保代价控制的一种鲁棒性分析方法,并建立了不确定线性系统的参数可变保代价控制鲁棒界.针对一类结构不确定线性系统,进一步给出了保代价控制鲁棒界的一种优化算法,并用实例加以验证. 相似文献
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模型不确定系统的鲁棒预测控制 总被引:3,自引:1,他引:3
针对一类脉冲传递函数描述的模型不确定系统 ,基于预测控制和鲁棒控制相结合的策略 ,提出一种鲁棒预测控制器的设计方法 ,并讨论了该方法允许的模型摄动鲁棒界 .仿真结果表明文中方法的有效性和理论分析的正确性 . 相似文献
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Robust Model Predictive Control for Linear Discrete‐Time System With Saturated Inputs and Randomly Occurring Uncertainties 下载免费PDF全文
Jianhua Wang Yan Song Sunjie Zhang Shuai Liu Abdullah M. Dobaie 《Asian journal of control》2018,20(1):425-436
This paper investigates the robust model predictive control (RMPC) problem for a class of linear discrete‐time systems subject to saturated inputs and randomly occurring uncertainties (ROUs). Due to limited bandwidth of the network channels, the networked transmission would inevitably lead to incomplete measurements and subsequently unavoidable network‐induced phenomenon that include saturated inputs as a special case. The saturated inputs are assumed to be sector‐bounded in the underlying system. In addition, the ROUs are taken into account to reflect the difficulties in precise system modelling, where the norm‐bounded uncertainties are governed by certain uncorrelated Bernoulli‐distributed white noise sequences with known conditional probabilities. Based on the invariant set theory, a sufficient condition is derived to guarantee the robust stability in the mean‐square sense of the closed‐loop system. By employing the convex optimization technique, the controller gain is obtained by solving an optimization problem with some inequality constraints. Finally, a simulation example is employed to demonstrate the effectiveness of the proposed RMPC scheme. 相似文献
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用插值的粗粒化Box Model进行学习控制 总被引:1,自引:0,他引:1
针对一类未知动力学方程的单输入系统,采用插值的粗粒化Box Model进行学习控制.与传统的Box Model及基于随机元胞自动机的控制模式比较,本模型设计思想自然,算法简单.计算量小(常常小几个数量级),训练时间短,对三个较有代表性的实例的仿真结果也是令人满意的. 相似文献
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带状态观测器系统的鲁棒容错控制 总被引:14,自引:0,他引:14
对具有不确定性参数的状态观在反馈系统,提出了传感器失效的鲁棒完整性控制方法,并对一定的二次性能指标具有最优性,设计方法简单、实用。 相似文献
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针对有输入约束的不确定时延网络控制系统,提出鲁棒模型预测控制方法;其中,将不确定时延建模为范数有界的输入矩阵的不确定性.给出了鲁棒性能指标的上界和系统渐近稳定的充分条件,通过在线求解LMI凸优化问题得到状态反馈控制律.仿真例子验证了该方法的有效性. 相似文献
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Power control in a code‐division multiple access (CDMA) based cellular network is a challenging problem because the communication channels change rapidly because of multipath fading. These rapid fluctuations cause detrimental effects on the control efforts required to regulate the signal‐to‐interference plus noise ratios (SINRs) to the desired level. Thus, there is a need for power‐control algorithms that can adapt to rapid changes in the channel gain caused by multipath fading. Much of the previous work has either neglected the effects of fast fading, assumed that the fading is known, or assumed that all the link gains are known. In this paper, we model the effects of fast fading and develop practical strategies for robust power control based on SINR measurements in the presence of the fading. We develop a controller for the reverse link of a CDMA cellular system, and use a Lyapunov‐based analysis to prove that the SINR error is globally uniformly ultimately bounded. We also utilize a linear prediction filter that utilizes local SINR measurements and estimates of the Doppler frequency that can be derived from local SINR measurements to improve the estimate of the channel fading used in the controller. The power‐control algorithm is simulated for a cellular network with multiple cells, and the results indicate that the controller regulates the SINRs of all the mobile terminals (MTs) with low outage probability. In addition, a pulse‐code‐modulation technique is applied to allow the control command to be quantized for feedback to the transmitter. Simulation results indicate that the outage probabilities of all the MTs are still within the acceptable range if at least 3‐bit quantization is employed. Comparisons to a standard algorithm illustrate the improved performance of the predictive controller. 相似文献
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基于状态估计的摩擦模糊建模与鲁棒自适应控制 总被引:2,自引:1,他引:2
针对一类多自由度机械系统, 研究了基于状态估计的摩擦模糊建模与鲁棒自适应控制问题. 提出用模糊状态估计器估计摩擦模型中的不可测变量, 并用严格正实和李雅普诺夫稳定性理论证明了状态估计误差的一致最终有界性. 运用模糊状态估计结果设计了多变量鲁棒自适应控制器, 其中摩擦模糊模型中的自适应参数是基于李雅普诺夫稳定性理论设计的, 并证明了闭环系统跟踪误差的一致最终有界性. 本文对多自由度质量、弹簧和摩擦阻尼系统进行的仿真, 结果表明所提出的状态估计算法和自适应控制策略是有效的. 相似文献
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在机器人力/位置混合控制的基础上,本文提出了一种对力控制回路采用自适应模糊控制的方法,有利于提高系统对机器人末端操纵器五外界工作环境接触时,其接触刚度不确定性的自适应能力,仿真结果表明,该控制方法与常规PID控制相比,系统的自适应能力和鲁棒性有显著的改善。 相似文献