基于自适应神经模糊推理系统的非线性系统控制

由于非线性系统具有模糊性、不确定性、非线性等特点,所以常常使用模糊控制来对其实现控制,但常规的模糊控制系统存在着一定的问题。该文把神经网络与模糊控制相结合,介绍了自适应神经元模糊推理系统ANFIS(Adaptive Neuro—Fuzzy Inference System)的基本结构,并将ANFIS用于典型的非线性系统控制中,仿真结果表明训练后的ANFIS能很好地控制实际的对象。     

基于T-S模型的锌钡白干燥煅烧过程自适应神经模糊推理系统建模

针对锌钡白干燥煅烧过程建模难的问题，提出了一种基于T-S模型的自适应神经模糊推理系统(ANFIS)建模方法．通过对模糊辨识系统的结构辨识和参数辨识，使网络自主、迅速地收敛到要求的输入输出关系．文章讨论了该网络的结构和学习算法，并通过仿真研究得出其良好的实际应用价值．     

应用自适应神经模糊推理系统(ANFIS)进行建模与仿真

模糊规划的提取和隶属度函数的学习是模糊推理系统设计中重要而困难的问题，自适应神经模糊推理系统（ANFIS）方法基于Sugeno模糊模型，其结构类似于神经网络，采用反向传播算法和最小二乘法调整模糊推理系统的参数，并能自动产生模糊规划，本文应用该方法给出了对一个典型系统建模的仿真实例，取得了良好的效果。     

自适应神经网络模糊推理系统最优参数的研究

模糊规则的提取和隶属度函数的学习是模糊系统设计中重要而困难的问题。自适应神经网络模糊推理系统（ANFIS）能基于数据建模,无须专家经验,自动产生模糊规则和调整隶属度函数。在建立一个初始系统进行训练时,其隶属度函数的类型、隶属度函数的数日以及训练次数都是待定的,这三个参数的选择直接影响系统训练后的效果,它们的确定方法有待研究。该文应用自适应神经网络模糊推理系统的方法对一个典型系统进行建模仿真,并阐述这三个参数的寻优方法。     

自适应神经模糊推理系统的参数优化方法

自适应神经模糊推理系统(ANFIS)将模糊推理系统(FIS)中的模糊逻辑规则及隶属度函数参数通过神经网络的自学习来整定,自动产生模糊规则和调整隶属度函数,解决了模糊控制系统中模糊推理规则主要根据专家经验设计、缺乏自学习能力、控制精度不高等问题.而在建立一个初始系统进行训练时,其训练次数、隶属度函数的数目及类型都是待定的,这三个参数的选择直接影响系统训练后的效果,其确定方法值得研究.本文应用自适应神经模糊推理系统对一个典型系统进行建模仿真,并提出三个参数的寻优方法.     

基于Choquet积分-OWA的自适应神经模糊推理系统及其应用

针对已有的自适应神经模糊推理系统(ANFIS)在模糊规则后件表达上的缺陷和常见的模糊推理系统存在的主要问题,提出基于Choquet积分OWA的模糊推理系统(AggFIS),在模糊规则的后件表达、模糊算子的普适性和输入及规则的权重等方面有很大优势,它试图建立能够充分体现模糊逻辑本质和人类思维模式的模糊推理系统.根据模糊神经网的基本原理将AggFIS与前馈神经网络相结合,得到基于Choquet积分-OWA的自适应神经模糊推理系统(Agg-ANFIS),并将该模型应用于交通服务水平评价问题.实验结果证明,基于Choquet积分OWA的自适应神经模糊推理系统具有很好的非线性映射功能,它的本质是一类通用逼近器,为解决复杂系统的建模、分析及预测问题提供了有效的途径.     

降水量的自适应神经网络模糊推理预报

为了对降水量进行建模与预测 ,介绍了自适应神经网络模糊推理系统 ,设计了基于神经网络的自适应模糊控制器 ,该网络能从一组操作数据中提取模糊控制规则 ,提高降水量预报的准确度。仿真结果表明 ,该方法是非常有效的。     

基于自适应神经模糊推理系统的噪声消除方法

针对信号处理领域噪声消除的实际问题,提出了一种基于模糊推理的自适应神经网络控制方法.通过自适应神经模糊推理系统(ANFIS)对非线性系统的结构和参数进行辨识与自学习,采用混合学习算法,对前向参数和结论参数分别辨识,在提高精度的同时可加快训练收敛的速度,使控制系统具有良好动静态性和鲁棒性,实现了消除通信系统中噪声的目标,最后对基于ANFIS的噪声消除系统进行了建模和仿真,并与自适应神经网络滤波方法的结果对比,其结果证明了该方法的有效性.     

基于自适应神经模糊推理的倒立摆控制

本文研究基于自适应神经模糊推理（ANFIS）的三级倒立摆控制。ANFIS建立在专家经验的基础上，以收集到的数据为样本，进行训练学习，从而优化模糊控制器参数，然后用优化的控制器对倒立摆系统进行控制，并与线性二次型最优控制LQR做了比较，实验表明ANFIS具有调节时间短和稳定性好等优点。     

基于自适应神经模糊推理系统的永磁同步电机直接转矩控制

为减小永磁同步电机直接转矩控制系统的转矩脉动,提高系统的稳态精度和动态响应,设计了一种自适应神经模糊推理系统速度控制器,使电动机转子速度快速跟随给定值,并给出了详细的实现方法。仿真实验结果表明,具有ANFIS速度控制器的永磁同步电机直接转矩控制系统不仅动态和稳态性能都得到提高,而且具有较强的鲁棒性。     

基于免疫进化规划的一种柔性神经模糊推理系统

该文基于泛逻辑学提出一种新颖的柔性神经模糊推理系统,用命题间的广义相关性和广义自相关性去解释系统推理模式的连续可变,以及命题真值的测量误差,以期实现真正的智能控制系统,并采用了将进化规划同生物免疫思想中的浓度机制及多样性保持策略相结合的免疫进化规划学习算法,自适应地学习系统参数。最后通过倒立摆的仿真实验体现了该推理系统的可用性和有效性。     

Speed control of Brushless DC motor using bat algorithm optimized Adaptive Neuro-Fuzzy Inference System

In this paper, speed control of Brushless DC motor using Bat algorithm optimized online Adaptive Neuro-Fuzzy Inference System is presented. Learning parameters of the online ANFIS controller, i.e., Learning Rate (η), Forgetting Factor (λ) and Steepest Descent Momentum Constant (α) are optimized for different operating conditions of Brushless DC motor using Genetic Algorithm, Particle Swarm Optimization, and Bat algorithm. In addition, tuning of the gains of the Proportional Integral Derivative (PID), Fuzzy PID, and Adaptive Fuzzy Logic Controller is optimized using Genetic Algorithm, Particle Swarm Optimization and Bat Algorithm. Time domain specification of the speed response such as rise time, peak overshoot, undershoot, recovery time, settling time and steady state error is obtained and compared for the considered controllers. Also, performance indices such as Root Mean Squared Error, Integral of Absolute Error, Integral of Time Multiplied Absolute Error and Integral of Squared Error are evaluated and compared for the above controllers. In order to validate the effectiveness of the proposed controller, simulation is performed under constant load condition, varying load condition and varying set speed conditions of the Brushless DC motor. The real time experimental verification of the proposed controller is verified using an advanced DSP processor. The simulation and experimental results confirm that bat algorithm optimized online ANFIS controller outperforms the other controllers under all considered operating conditions.     

基于自适应模糊神经推理的视频镜头边界检测方法

自动镜头边界检测是实现基于内容的视频检索的一个重要步骤.本文提出了一种基于自适应模糊推理(ANFIS)的镜头检测方法,利用ANFIS训练后得到的模糊规则进行决策.通过实验证明,本文算法取得了不错的效果.     

Adaptive Neuro-Fuzzy Inference System for diagnosis risk in dengue patients

Dengue disease is considered as one of the life threatening disease that has no vaccine to reduce its case fatality. In clinical practice the case fatality of dengue disease can be reduced to 1% if the dengue patients are hospitalized and prompt intravenous fluid therapy is administrated. Yet, it has been a great challenge to the physicians to decide whether to hospitalize the dengue patients or not due to the overlapping of the medical diagnosis criteria of the disease. Beside that physicians cannot decide to admit all patients because this will have major impact on health care cost saving due to the huge incident of dengue disease in the country. Even if the physicians managed to identify the critical cases to be hospitalized, most of the tools that have been used for monitoring those patients are invasive. Therefore, this study was conducted to develop a non-invasive accurate diagnostic system that can assist the physicians to diagnose the risk in dengue patients and therefore attain the correct decision. Bioelectrical Impedance Analysis measurements, Symptoms and Signs presented with dengue patients were incorporated with Adaptive Neuro-Fuzzy Inference System (ANFIS) to construct two diagnostic models. The first model was developed by systematically optimizing the initial ANFIS model parameters while the second model was developed by employing the subtractive clustering algorithm to optimize the initial ANFIS model parameters. The results showed that the ANFIS model based on subtractive clustering technique has superior performance compared with the other model. Overall diagnostic accuracy of the proposed system is 86.13% with 87.5% sensitivity and 86.7% specificity.     

Adaptive Neuro-Fuzzy Inference System Modeling of MRR and WIWNU in CMP Process With Sparse Experimental Data

Availability of only limited or sparse experimental data impedes the ability of current models of chemical mechanical planarization (CMP) to accurately capture and predict the underlying complex chemomechanical interactions. Modeling approaches that can effectively interpret such data are therefore necessary. In this paper, a new approach to predict the material removal rate (MRR) and within wafer nonuniformity (WIWNU) in CMP of silicon wafers using sparse-data sets is presented. The approach involves utilization of an adaptive neuro-fuzzy inference system (ANFIS) based on subtractive clustering (SC) of the input parameter space. Linear statistical models were used to assess the relative significance of process input parameters and their interactions. Substantial improvements in predicting CMP behaviors under sparse-data conditions can be achieved from fine-tuning membership functions of statistically less significant input parameters. The approach was also found to perform better than alternative neural network (NN) and neuro-fuzzy modeling methods for capturing the complex relationships that connect the machine and material parameters in CMP with MRR and WIWNU, as well as for predicting MRR and WIWNU in CMP.     

基于神经模糊系统的热工过程建模及预测

热工对象内部过程的物理性能比较复杂,其往往表现出非线性、严重时变、大迟延和不确定等特点,这就使得难以对其建立比较精确的模型。该文以自适应神经模糊推理系统(ANFIS)作为辨识器建立热工过程模型,用ANFIS分别建立锅炉-汽轮机的非线性模型、不同负荷工况点的线性模型,并根据现场采集的锅炉-汽轮机系统数据建立了ANFIS模型。对以上三个系统的建模仿真结果表明基于ANFIS建立的模型具有较高的模型精度和较好的预测能力,ANFIS可用于非线性系统、复杂系统的建模和预测,并具有较少的训练次数和较小的预测误差。