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一类非线性MIMO系统的间接自适应模糊鲁棒控制 总被引:1,自引:0,他引:1
针对一类模型未知的非线性MIMO系统,将自适应控制、H^∞控制与模糊逻辑逼近方法结合到一起,应用“主导输入”的概念,提出了一种间接自适应模糊鲁棒控制设计方法,该方法确保了闭环系统全局稳定,并获得了H^∞跟踪性能指标,使外部干扰,模糊逻辑逼近误差和输入对输出的交叉耦合对跟踪误差的影响可衰减到给定的水平。 相似文献
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一类非线性MIMO系统的间接自适应模糊鲁棒控制 总被引:6,自引:1,他引:6
针对一类模型未知的非线性MIMO系统,将自适应控制、H∞控制与模糊逻辑逼近方法结合到一起,应用"主导输入"的概念,提出了一种间接自适应模糊鲁棒控制设计方法.该方法确保了闭环系统全局稳定,并获得了H∞跟踪性能指标,使外部干扰、模糊逻辑逼近误差和输入对输出的交叉耦合对跟踪误差的影响可衰减到给定的水平. 相似文献
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本文通过引入一类新的目标函数,对死区非线性系统建立了全局收敛的自适应控制算法,该算法可用于最小相应和非最小相位系统,并具有渐近最优的控制效果。仿真实验表明本文算法具有良好的动态性能。 相似文献
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针对带一类非线性参数系统的状态反馈自适应跟踪控制问题,通过设计一种新的李亚普诺夫函数--加权控制李亚普诺夫函数,由它作用于控制器和参数调整律,使之达到全局渐近跟踪从而满足控制指标。 相似文献
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本文研究了可用确定性多变量Hammerstein模型描述的一类多变量非线性系统的自适应控制,基于对一步最优控制律所产生的闭环系统的稳定性条件的分析,提出了一种适用于线性部分为具有任意关联矩阵的非最小相位系统的简单次优控制律及相应的直接自适应控制算法,并证明了算法的全局收敛性. 相似文献
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In this paper, an adaptive dynamic surface control scheme is proposed for a class of multi-input multi-output (MIMO) nonlinear time-varying systems. By fusing a bound estimation approach, a smooth function and a time-varying matrix factorisation, the obstacle caused by unknown time-varying parameters is circumvented. The proposed scheme is free of the problem of explosion of complexity and needs only one updated parameter at each design step. Moreover, all tracking errors can converge to predefined arbitrarily small residual sets with a prescribed convergence rate and maximum overshoot. Such features result in a simple adaptive controller which can be easily implemented in applications with less computational burden and satisfactory tracking performance. Simulation results are presented to illustrate the effectiveness of the proposed scheme. 相似文献
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针对一类非线性大滞后系统, 基于伪偏导数概念的动态线性化非线性系统模型, 利用离散时间预测器技术, 实现了系统原始表达式中滞后环节的隐性表达, 并结合离散积分滑模控制(discrete integral sliding mode control, DISMC)方法, 提出了一种新的无模型自适应离散积分滑模控制(model-free adaptive discrete integral sliding mode control, MFA-DISMC)方案. 该方法的主要特点是控制器设计仅取决于被控对象的输入和输出测量数据. 通过理论分析证明了算法的稳定性, 仿真研究表明, 相比于无模型自适应控制(model-free adaptive control, MFAC)、Smith预估控制、改进的MFAC控制以及比例–积分–微分(proportional-integral-derivative, PID) 控制方法, 本文方法具有更快的响应速度和更强的鲁棒性. 最后, 通过双容水箱液位控制系统的实验研究, 验证了所提出方法的有效性. 相似文献
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针对一类包含扰动的非线性离散时间系统,提出一种新的无模型自适应离散积分终端滑模控制算法.该算法基于紧格式动态线性化数据模型,利用离散积分终端滑模控制算法设计无模型自适应控制器,并采用扰动估计技术估计系统的扰动项,其中动态线性化方法中“伪偏导数”的估计算法仅依赖于被控系统的I/O测量数据.理论分析证明了系统输入输出有界,并通过仿真实验验证了所提算法的有效性. 相似文献
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本文针对一类具有执行器故障的多输入多输出(Multi-input multi-output,MIMO)不确定连续仿射非线性系统,提出了一种最优自适应输出跟踪控制方案.设计了保证系统稳定性的不确定项估计神经网络权值调整算法,仅采用评价网络即可同时获得无限时域代价函数和满足哈密顿-雅可比-贝尔曼(Hamilton-Jacobi-Bellman,HJB)方程的最优控制输入.考虑执行器卡死和部分失效故障,设计最优自适应补偿控制律,所设计的控制律可以实现对参考输出的一致最终有界跟踪.飞行器控制仿真和对比验证表明了本文方法的有效性和优越性. 相似文献
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In this paper, a novel robust adaptive neural control scheme is proposed for a class of uncertain multi-input multi-output nonlinear systems. The proposed scheme has the following main features: (1) a kind of Hurwitz condition is introduced to handle the state-dependent control gain matrix and some assumptions in existing schemes are relaxed; (2) by introducing a novel matrix normalisation technique, it is shown that all bound restrictions imposed on the control gain matrix in existing schemes can be removed; (3) the singularity problem is avoided without any extra effort, which makes the control law quite simple. Besides, with the aid of the minimal learning parameter technique, only one parameter needs to be updated online regardless of the system input–output dimension and the number of neural network nodes. Simulation results are presented to illustrate the effectiveness of the proposed scheme. 相似文献
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There have been many algorithms proposed for adaptive control which will provide globally asymptotically stable controllers if some stringent conditions on the plant are met. The conditions on the plant cannot be met in practice as all plants will contain high frequency unmodeled dynamics. This paper uses a linearization analysis of a nonlinear adaptive controller to demonstrate analytically some design guidelines which alleviate some of the problems associated with adaptive control in the presence of unmodeled dynamics. The points made are further demonstrated by simulation results. 相似文献
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Yuan-Xin Li Guang-Hong Yang Shaocheng Tong 《International journal of systems science》2018,49(12):2618-2629
This paper addresses the problem of an adaptive fuzzy event-triggered control (ETC) for uncertain multi-input and multi-output nonlinear systems. To reduce the communication burden of the network control systems, a novel state-dependent event-triggering condition is designed to decide when to update the controllers. By combining the backstepping and event-trigged techniques, the adaptive fuzzy ETC strategies are developed and the resulting closed-loop system is semi-global bounded. Finally, the analytical results are substantiated using simulation studies. 相似文献