一类不确定非线性系统的直接自适应模糊控制

针对一类具有未知函数增益的不确定非线性系统,基于监督控制方法并利用第二类模糊系统的通用逼近能力,提出一种新的直接自适应模糊控制设计方案.该方案通过引入最优逼近误差的自适应补偿项和新的鲁棒项,削减建模误差和参数估计误差的影响,从而在稳定性分析中取消了要求逼近误差平方可积或逼近误差的上确界已知的条件.理论分析证明了闭环系统状态有界,跟踪误差收敛到零.仿真结果表明了该方法的有效性.     

基于模糊控制的交流伺服系统的设计

针对永磁同步电动机交流伺服系统,提出了模糊控制方案.在交流伺服系统的设计中,采用模糊控制器作为其位置调节器,采用电流快速跟踪控制方案设计电流调节器,对于速度调节器,按Ⅱ型系统设计,并选用PI型调节器,极大地提高了系统的性能.实验与仿真结果表明,基于模糊控制的交流伺服系统与常规PID控制的交流伺服系统相比,具有良好的动态、稳态性能以及较强的鲁棒性,从而证明了这种设计方法的合理性和优越性.     

A dynamic fuzzy clustering method based on genetic algorithm

A dynamic fuzzy clustering method is presented based on the genetic algorithm. By calculating the fuzzy dissimilarity between samples the essential associations among samples are modeled factually. The fuzzy dissimilarity between two samples is mapped into their Euclidean distance, that is, the high dimensional samples are mapped into the two-dimensional plane. The mapping is optimized globally by the genetic algorithm, which adjusts the coordinates of each sample, and thus the Euclidean distance, to approximate to the fuzzy dissimilarity between samples gradually. A key advantage of the proposed method is that the clustering is independent of the space distribution of input samples, which improves the flexibility and visualization. This method possesses characteristics of a faster convergence rate and more exact clustering than some typical clustering algorithms. Simulated experiments show the feasibility and availability of the proposed method.     

一种基于自适应模糊滤波的语音增强方法

在语音识别和语者识别中，通常需要先将输入的语音信号进行去噪处理，这样可使识别的正确率大大提高，通常采用基于LMS算法和RLS算法的自适应线性滤波器来进行去噪。提出了一种基于自适应模糊滤波器的语音增强方法，该模糊滤波器是一种非线性滤波器，它在语音信号的特征域空间采用参数映射的方式来滤除噪声，并能够进行自适应结构调整和参数更新。实验结果表明，采用自适应模糊滤波器来滤除噪声比线性滤波器具有更好的效果。     

模糊综合评价法在企业R＆D能力评价中的应用

依据影响企业R＆D能力的诸多不确定因素，运用模糊综合评价法从整体上评价各个影响因素，综合评价企业R＆D能力。     

Disaster Reduction Decision Support System Against Debris Flows and Landslides Along Highway in Mountainous Area

Highways in mountainous areas are easy to be damaged by such natural disasters as debris flows and landslides and disaster reduction decision support system (DRDSS) is one of the important means to mitigate these disasters. Guided by the theories and technologies of debris flow and landslide reduction and supported by geographical information system (GIS), remote sensing and database techniques, a DRDSS against debris flow and landslide along highways in mountainous areas has been established on the basis of such principles as pertinence, systematicness, effectiveness, easy to use, open and expandability. The system consists of database, disaster analysis models and decisions on reduction of debris flows and landslides, mainly functioning to zone disaster dangerous degree, analyze debris flow activity,simulate debris flow deposition and diffusion, analyze landslide stability, select optimal highway renovation scheme and plan disaster prevention and control ergineering. This system has been applied successfully to the debris flow and landslide treatment works along Palongzangbu Section of Sichuan-Tibet Highway.     

模糊分析在油气储量产能预测中的应用--以靖安油田盘古梁区开发数据为例的分析

针对常规因素分析法在实际应用中所存在的一些问题 ,在阐述模糊分析理论特点和数学模型的同时 ,具体研究了模糊分析设计在油气储量产能预测中的应用 .通过多因素关联度分析导出影响产能开发的因素 ,从主到次依次为 :渗透率、油层厚度、加砂强度、加砂量、孔隙度等     

基于模糊控制理论的振动控制研究

基于模糊控制理论，对夹层板的受迫振动控制进行了仿真研究。首先通过动态特性实验来识别出仿真所需的振动系统动力学参数，同时通过不同电场强度下夹层板实测的频响函数曲线和控制要求，设计出相应的模糊控制律。振动控制的数值仿真结果表明：用模糊控制方法拉制夹层板的振动是十分有效的。     

模糊综合评价在高校系级教学档案管理中的应用

利用模糊综合评价对系级教学档案管理进行评价，使评价的结果更准确、更客观、更科学，有利于提高系级教学档案管理的质量。     

模糊逻辑组合的灰度模型

首先对复合模糊命题的几种真值计算方法作了介绍，分析各种方法的优缺点，接着为了处理日益增多的模糊逻辑组合算子给用户带来不便的问题，提出模糊逻辑的灰度概念，给出一个处理逻辑组合的灰度模型。它能将具有不同灰度的模糊逻辑统一起来．