共查询到20条相似文献,搜索用时 171 毫秒
1.
2.
3.
本文利用模糊控制理论中的T-S模糊控制模型,将之和脉冲控制方法结合,提出了一种脉冲T-S模糊控制方法。给出了控制器的设计方法并进行控制系统稳定性能的讨论。这种控制方法能综合脉冲控制的简易性和模糊控制的非线性处理的能力.是一种有效的控制方法。 相似文献
4.
5.
6.
7.
预测模糊控制在聚合反应釜中的仿真研究 总被引:1,自引:0,他引:1
聚合反应釜温度控制系统的数学模型具有非线性、大惯性、纯滞后以及时变等特点,传统的PID控制依赖于被控对象的精确数学模型,很难达到令人满意的控制效果。模糊控制和预测控制都是对不确定系统进行控制的有效方法,而预测模糊控制作为二者相结合的产物,可进一步提高控制的效果。该文提出了将预测模糊控制运用于聚合反应釜温度控制器的设计,为聚合反应釜的控制提出了一种新算法。理论分析和基于MATLAB的仿真研究表明,该控制方法具有使系统超调量小、调整时间短、对系统参数变化和外界干扰有较强的鲁棒性等优点,是一种提高聚合反应釜温度控制效果的有效方法。 相似文献
8.
9.
10.
基于模糊推理的热轧带钢宽度控制 总被引:1,自引:0,他引:1
带钢热连轧宽度控制过程是一个复杂的非线性过程、难以建立精确的数学模型,对于传统的数学模型的轧机计算很难实现精度要求。设计一种用于宽度控制的模糊控制器。模糊控制器根据推理规则获得控制系统的查询表。并用Matlab语言的Simulink仿真工具,进行了常规控制与模糊控制的动态性能的仿真比较,结果表明模糊控制可明显提高宽度控制系统的动态性能。 相似文献
11.
WITOLD PEDRYCZ 《国际通用系统杂志》2013,42(3):125-132
The paper deals with the notion of fuzzy systems described by means or fuzzy relational equations with triangular norms. Some fundamental pro Menu concerned with identification and control arc formulated and several algorithms are provided. An applicability of a concept of fuzzy discretization in system analysis is pointed out. Numerical results obtained form an illustration of theoretical background considered. 相似文献
12.
模糊控制在张力辊双闭环系统中的应用 总被引:1,自引:0,他引:1
随着卷取机自动化技术的发展,描述卷取机运动的重要参数--速度控制显得越加重要.本文主要研究模糊控制理论在张力辊速度控制中的应用.介绍了两种模糊控制器的设计,并利用MATLAB(SIMULINK)进行了计算机仿真.仿真结果表明,该模糊控制系统具有较好的控制性能,对进一步应用研究具有较大的参考价值. 相似文献
13.
This paper proposes another adaptive control scheme for nonlinear systems using a Takagi-Sugeno fuzzy model. Takagi-Sugeno
fuzzy models have been widely used to identify the structures and parameters of unknown or partially known plants, and to
control nonlinear systems. This scheme shows a good approximation capability by the fuzzy blending of local dynamics. Since
a Takagi-Sugeno fuzzy model is a nonlinear system in nature, and its parameters are not linearly parameterized, it is difficult
to design an adaptive controller using conventional design methods for adaptive controllers which are derived from linearly
parameterized systems. In this paper, the functional form of the local dynamics are assumed to be known, but the corresponding
parameters are unknown. This additional information about system nonlinearity makes it possible to design an adaptive controller
for a nonlinearly parameterized system. The control law is similar to that of a conventional adaptive control technique, while
its parameter-update rule is based on the local search method. A parameter-update law is derived so that the time-derivative
of the Lyapunov function is negative in the region of interest. Simulation results have shown that this adaptive controller
is capable of a good performance.
This work was presented in part at the Fifth International Symposium on Artificial Life and Robotics, Oita, Japan, January
26–28, 2000 相似文献
14.
15.
T-S模糊控制系统的稳定性分析及系统化设计 总被引:15,自引:3,他引:15
研究了输入采用双交叠模糊分划的模糊控制系统的性质,提出了一个新的判定T—S模
糊控制系统稳定的充分条件.该条件只需在各最大交叠规则组内分别寻找公共的正定矩阵,减
小了以往稳定性判定方法的局限性和难度.运用并行分布补偿法(PDC)进一步探讨了闭环T-S
模糊控制系统的稳定性分析和模糊控制器系统化设计方法.通过两个例子的仿真研究验证了本
文方法的有效性. 相似文献
16.
In this paper, the robust adaptive fuzzy tracking control problem is discussed for a class of perturbed strict-feedback nonlinear systems. The fuzzy logic systems in Mamdani type are used to approximate unknown nonlinear functions. A design scheme of the robust adaptive fuzzy controller is proposed by use of the backstepping technique. The proposed controller guarantees semi-global uniform ultimate boundedness of all the signals in the derived closed-loop system and achieves the good tracking performance. The possible controller singularity problem which may occur in some existing adaptive control schemes with feedback linearization techniques can be avoided. In addition, the number of the on-line adaptive parameters is not more than the order of the designed system. Finally, two simulation examples are used to demonstrate the effectiveness of the proposed control scheme. 相似文献
17.
In this paper, the robust adaptive fuzzy tracking control problem is discussed for a class of perturbed strict-feedback nonlinear systems. The fuzzy logic systems in Mamdani type are used to approximate unknown nonlinear functions. A design scheme of the robust adaptive fuzzy controller is proposed by use of the backstepping technique. The proposed controller guarantees semi-global uniform ultimate boundedness of all the signals in the derived closed-loop system and achieves the good tracking performance. The possible controller singularity problem which may occur in some existing adaptive control schemes with feedback linearization techniques can be avoided. In addition, the number of the on-line adaptive parameters is not more than the order of the designed system. Finally, two simulation examples are used to demonstrate the effectiveness of the proposed control scheme. 相似文献
18.
This paper proposes a method for adaptive identification and control for industrial applications. The learning of a T–S fuzzy model is performed from input/output data to approximate unknown nonlinear processes by a hierarchical genetic algorithm (HGA). The HGA approach is composed by five hierarchical levels where the following parameters of the T–S fuzzy system are learned: input variables and their respective time delays, antecedent fuzzy sets, consequent parameters, and fuzzy rules. In order to reduce the computational cost and increase the algorithm’s performance an initialization method is applied on HGA. To deal with nonlinear plants and time-varying processes, the T–S fuzzy model is adapted online to maintain the quality of the identification/control. The identification methodology is proposed for two application problems: (1) the design of data-driven soft sensors, and (2) the learning of a model for the Generalized predictive control (GPC) algorithm. The integration of the proposed adaptive identification method with the GPC results in an effective adaptive predictive fuzzy control methodology. To validate and demonstrate the performance and effectiveness of the proposed methodologies, they are applied on identification of a model for the estimation of the flour concentration in the effluent of a real-world wastewater treatment system; and on control of a simulated continuous stirred tank reactor (CSTR) and on a real experimental setup composed of two coupled DC motors. The results are presented, showing that the developed evolving T–S fuzzy model can identify the nonlinear systems satisfactorily and it can be used successfully as a prediction model of the process for the GPC controller. 相似文献
19.
This paper focuses on the problem of fuzzy control for a class of continuous-time T-S fuzzy systems.New methods of stabilization design and H infinity control are derived based on a relaxed approach in... 相似文献
20.
A novel fuzzy dynamical system approach to the control design of flexible joint manipulators with mismatched uncertainty is proposed. Uncertainties of the system are assumed to lie within prescribed fuzzy sets. The desired system performance includes a deterministic phase and a fuzzy phase. First, by creatively implanting a fictitious control, a robust control scheme is constructed to render the system uniformly bounded and uniformly ultimately bounded. Both the manipulator modelling and control scheme are deterministic and not IF-THEN heuristic rules-based. Next, a fuzzy-based performance index is proposed. An optimal design problem for a control design parameter is formulated as a constrained optimisation problem. The global solution to this problem can be obtained from solving two quartic equations. The fuzzy dynamical system approach is systematic and is able to assure the deterministic performance as well as to minimise the fuzzy performance index. 相似文献