共查询到19条相似文献,搜索用时 0 毫秒
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基于线性T-S模糊系统的自适应系统的设计和稳定性分析 总被引:3,自引:1,他引:2
提出了一种新型的模糊自适应控制器.其中系统的未知函数由线性T-S模糊系统估计,模糊规则的后件是线性可调的.因线性T-S模糊系统较之Mamdani模糊系统具有更好的估计性能,我们可以获得更小的跟踪误差.由于采用李亚普诺夫合成方法来设计控制器,整个闭环系统全局稳定,所有的信号有界.对倒立摆的仿真验证了这一点. 相似文献
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模糊PID控制器的稳定性分析 总被引:2,自引:0,他引:2
构造出一种PID型模糊控制器,并证明了这种模糊控制器近似于一种变参数的PID控制器,以PID模型为基础,基于无源性定量对模型PID控制器的稳定性进行分析,导出了使模糊PID控制器稳定的充分条件,为设计稳定的模糊PID控制器提供了理论指导。 相似文献
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针对模糊双曲正切模型提出一种非线性二次性指标,并给出使该性能指标最小的最优控制器的设计方法。同时扩展了线性H∞控制的概念,给出基于模糊双曲正切模型H∞控制器的设计方法。 相似文献
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将非线性系统用T-S模糊动态模型描述,并将全局模糊系统模型表示成不确定系统形式采用新的鲁棒控制器设计方法,设计出使全局模糊系统模型渐近稳定的线性控制器避免了并行分配补偿法中求解公共矩阵P的困难.一级倒立摆的模糊控制器设计实例,证明了方案的简洁有效. 相似文献
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一类非线性系统的建模、辨识与控制研究 总被引:12,自引:1,他引:12
提出一种新型的双曲正切模型,这种模型是一种模糊模型,可以很容易由几条模型规则得出,同时此模型也是一和中神经网络模型,因此模型参数可以通过网络学习获得,而且这种模型可以看作是线性模型的扩展,因此许多线性控制理论的结果可用来分析闭环系统稳定性。最后给出了基于此模型的稳定H∞控制器的设计方法。仿真结果表明这了种模型的有效笥及其控制器设计方法的优良性能。 相似文献
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Zhang Huaguang Quan Yongbing 《Fuzzy Systems, IEEE Transactions on》2001,9(2):349-354
In this paper, we propose a new fuzzy hyperbolic model for a class of complex systems, which is difficult to model. The fuzzy hyperbolic model is a nonlinear model in nature and can be easily derived from a set of fuzzy rules. It can also be seen as a feedforward neural network model and so we can identify the model parameters by BP-algorithm. We prove that the stable controller can be designed based on linear system theory. Two methods of designing the controller for the fuzzy hyperbolic model are proposed. The results of simulation support the effectiveness of the model and the control scheme 相似文献
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Minglai Chen 《International journal of systems science》2013,44(9):1614-1627
This paper concerns the problems of non-fragile guaranteed cost control (GCC) for nonlinear systems with or without parameter uncertainties. The Takagi–Sugeno (T–S) fuzzy hyperbolic model is employed to represent the nonlinear system. The non-fragile controller is designed by parallel distributed compensation (PDC) method, and some sufficient conditions are formulated via linear matrix inequalities (LMIs) such that the system is asymptotically stable and the cost function satisfies an upper bound in the presence of the additive controller perturbations. The above approach is also extended to the non-fragile GCC of T–S fuzzy hyperbolic system with parameter uncertainties, and the robust non-fragile GCC scheme is obtained. The main advantage of the non-fragile GCC based on the T–S fuzzy hyperbolic model is that it can achieve small control amplitude via ‘soft’ constraint approach. Finally, a numerical example and the Van de Vusse example are given to illustrate the effectiveness and feasibility of the proposed approach. 相似文献
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Margaliot M. Langholz G. 《IEEE transactions on systems, man, and cybernetics. Part A, Systems and humans : a publication of the IEEE Systems, Man, and Cybernetics Society》1999,29(1):1-10
In this paper, we consider a new approach to fuzzy control which entails the formulation of a novel state-space representation and a new form of optimal control problem. Basically, in this new formulation, linear functions in the conventional state-space representation and cost functional are replaced by hyperbolic functions. We give a solution for this new, infinite-time, optimal control problem, which we call hyperbolic optimal control. Furthermore, we show that the resulting optimal controller is in fact a Mamdani-type fuzzy controller with Gaussian membership functions and center of gravity defuzzification. These results enable us to investigate analytically important issues, such as stability and robustness, pertaining to fuzzy controllers as well as add a powerful theoretical framework to the field of fuzzy control 相似文献
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针对一类非线性系统的稳定控制器设计问题, 根据广义模糊双曲正切模型的万能逼近性质, 提出一种带有可调参数的广义模糊双曲正切模型的自适应控制器设计方法. 该设计方法的优点是使得自适应律的个数不依赖于广义模糊双曲正切模型的线性基函数的输出形式, 可以有效减少在线估计的参数数目, 并且能够保证被控系统的状态一致终极有界. 最后通过数值算例表明了所提出的设计方法的有效性.
相似文献18.
利用广义模糊双曲正切模型的全局逼近特点,设计一种直接模糊自适应控制器用于机器人轨迹跟踪控制.模糊控制器的输入变量经过平移变化后得到的广义输入变量能够覆盖整个输入空间,因此,模糊控制器能以任意精度逼近系统的最优控制;由于双曲正切模型的特殊结构,在保证跟踪精度的同时,避免了因模糊子集数目增加而带来的计算负担的增加,满足了机器人实时控制的需要.仿真结果表明,该控制算法具有较强的鲁棒性和较好的跟踪性. 相似文献