共查询到19条相似文献,搜索用时 62 毫秒
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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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一种非线性系统自适应控制及其收敛性分析* 总被引:2,自引:1,他引:2
本文对基于输入输出随机梯度的非线性系统的控制律进行了收敛性分析,给出了SISO控制系统收敛的充分条件,并根据该条件给出一种非线性系统自适应控制器的设计方法。 相似文献
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一类非线性MIMO系统的直接自适应模糊鲁棒控制 总被引:9,自引:2,他引:9
针对一类未知的非线性MIMO系统, 本文提出了一种直接自适应模糊鲁棒控制设计方法. 理论分析和仿真实验都已证明, 该方法确保闭环系统全局稳定, 获得H∞跟踪性能指标, 外部干扰、模糊逻辑逼近误差和输入对输出的交叉耦合可衰减到给定的水平, 系统鲁棒性好. 相似文献
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一类非线性MIMO系统的模糊自适应输出反馈控制 总被引:7,自引:0,他引:7
针对一类MIMO非线性状态不可测系统,提出一种基于观测器的模糊自适应输出反馈控制方法,通过应用“主导输入”的概念,并将自适应控制、H∞控制与模糊逻辑系统相结合,导出了输出反馈控制律以及参数的自适应律.基于李亚普诺夫函数证明了该控制方法可保证闭环系统的全局稳定,并获得了H∞跟踪性能指标. 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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In this paper, the adaptive robust tracking control scheme is proposed for a class of multi-input and multioutput (MIMO) non-affine systems with uncertain structure and parameters, unknown control direction and unknown external disturbance based on backstepping technique. The MIMO nonaffine system is first transformed into a time-varying system with strict feedback structure using the mean value theorem, and then the bounded time-varying parameters are estimated by adaptive algorithms with projection. To handle the possible "controller singularity" problem caused by unknown control direction, a Nussbaum function is employed, and the dynamic surface control (DSC) method is applied to solve the problem of "explosion of complexity" in backstepping control. It is proved that the proposed control scheme can guarantee that all signals of the closed-loop system are bounded through Lyapunov stability theorem and decoupled backstepping method. Simulation results are presented to illustrate the effectiveness of the proposed control scheme. 相似文献
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应用Lyapunov稳定性判据结合微分几何角线性化理论,给出一种具奇异摄动的可线性化非线性系统的鲁棒自适性控制方法,并给出了仿真实例。 相似文献
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Robust Adaptive Dynamic Surface Control for a Class of MIMO Nonlinear Systems with Unknown Non‐Symmetric Dead‐Zone 下载免费PDF全文
Yan Lin 《Asian journal of control》2014,16(2):478-488
This paper is devoted to adaptive output tracking for a class of multi‐input multi‐output nonlinear systems with unknown non‐symmetric dead‐zone. With the aid of a matrix factorization and a similarity transformation, a robust adaptive dynamic surface control scheme is proposed and the difficulty caused by the control gain matrix and the dead‐zone is circumvented. By introducing a surface error modification and an initialization technique, we show that the performance of the tracking errors can be guaranteed. Moreover, the proposed scheme contains only one updated parameter at each design step, which significantly reduces the computational burden. It is proven that all signals of the closed‐loop system are semi‐globally uniformly bounded. Simulation results on coupled inverted double pendulums are presented to illustrate the effectiveness of the proposed scheme. 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, 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