基于Matlab语言定量反馈控制器的分析与设计

对定量反馈理论（QFT）的基本原理进行了介绍和利用Matlab语言工具箱进行设计的基本方法，Matlab通用QFT工具箱为用户进行QFT控制器的设计提供了有利的工具，文章就以典型二阶系统为例进行QFT控制器的设计，仿真的结果表明定量反馈理论在不确定系统设计中有着经典控制理论无法替代的性能。     

A decade of progress in iterative process control design: from theory to practice

One of the most active areas of research in the nineties has been the study of the interplay between system identification and robust control design. It has led to the development of “control-oriented identification design”, the paradigm being that, since the model is only a tool for the design of a controller, its accuracy (or its error distribution) must be tuned towards the control design objective. This observation has led to the concept of “iterative identification and control design” and, subsequently, to model-free iterative controller design, in which the controller parameters are iteratively tuned on the basis of successive experiments performed on the real plant, leading to better and better closed-loop behaviour. These iterative methods have found immediate applications in industry; they have also been applied to the optimal tuning of PID controllers. This paper presents the progress that has been accomplished in iterative process control design over the last decade. It is illustrated with some applications in the chemical industry.     

Guaranteed H∞ robustness bounds for Wiener filtering and prediction

The paper deals with special classes of H_∞ estimation problems, where the signal to be estimated coincides with the uncorrupted measured output. Explicit bounds on the difference between nominal and actual H_∞ performance are obtained by means of elementary algebraic manipulations. These bounds are new in continuous‐time filtering and discrete‐time one‐step ahead prediction. As for discrete‐time filtering, the paper provides new proofs that are alternative to existing derivations based on the Krein spaces formalism. In particular, some remarkable H_∞ robustness properties of Kalman filters and predictors are highlighted. The usefulness of these results for improving the estimator design under a mixed H₂/H_∞ viewpoint is also discussed. The dualization of the analysis allows one to evaluate guaranteed H_∞ robustness bounds for state‐feedback regulators of systems affected by actuator disturbances. Copyright © 2001 John Wiley & Sons, Ltd.     

Plant zero structure and further order reduction of a singular H∞ controller

A new class of reduced‐order controllers is obtained for the H_∞ problem. The reduced‐order controller does not compromise the performance attained by the full‐order controller. Algorithms for deriving reduced‐order H_∞ controllers are presented in both continuous and discrete time. The reduction in order is related to unstable transmission zeros of the subsystem from disturbance inputs to measurement outputs. In the case where the subsystem has no infinite zeros, the resulting order of the H_∞ controller is lower than that of the existing reduced‐order H_∞ controller designs which are based on reduced‐order observer design. Furthermore, the mechanism of the controller order reduction is analysed on the basis of the two‐Riccati equation approach. The structure of the reduced‐order H_∞ controller is investigated. Copyright © 2002 John Wiley & Sons, Ltd.     

一种具有USB接口的通信控制器的设计实现

变电站自动化系统中常采用CAN总线实现间隔层与变电站层之间的数据通信，因而CAN总线到变电站层PC主机的数据通信成为影响系统性能的一个重要因素。USB总线是一种串行总线标准。文中介绍了一种具有USB接口的CAN通信控制器，该通信控制器具有USB的连接简单、传输速率高的优点，同时在软硬件实现上充分考虑了变电站环境的特点，采取多种措施保证系统通信的可靠性。     

自抗扰控制器在并联型有源滤波器中的应用

详细介绍了自抗扰控制器原理与结构，并将其应用在并联型有源电力滤波器中，根据自抗扰控制器的原理，文中将系统内部模型的不确定性与系统的外部不确定性统一视为系统的未知干扰，通过扩张状态观测器来估计，然后利用非线性反馈控制律进行补偿，使系统的控制律仅与系统的给定输入和输出有关，减少了控制过程中的检测量，将复杂的控制过程加以简化。通过参数的选取，在系统的仿真中获得了良好的控制效果，证明了控制策略的可行性，同时通过参数的改变，验证了该控制方法具有很强的适应性和鲁棒性。     

变频器在纤维帘布裁断机中的应用

介绍了三菱FR -A5 40系列变频器在纤维帘布裁断机中的应用 ,分析了各工位的工艺特点 ,给出了变频器的电气联接和速度控制的软件方法     

汽液两相流自调节水位控制器的应用

针对原浮球式水位控制器投用率低、可靠性较差的情况 ,介绍汽液两相流自调节水位控制器的原理及其特点。实践表明 ,该水位控制器运行稳定 ,可靠性高 ,提高了机组的热经济性能 ,适合在水位自调节的技改项目中推广应用。图 3     

用DSP实现开关磁阻电机的增益调度控制

在开关磁阻电机近似一阶模型的基础上，引入PI控制器的增益调度控制，采用DSP芯片以简单可行的方法实现对非线性开关磁阻电机的有效控制，以数字伺服系统的软件资源代替传统硬件电路，提高系统的实时性和控制精度。     

SVC平衡控制方法及其所需信号的检测

本文探讨了静止无功补偿器（SVC）在三相对称和不对称、电压电流波形有畸变情况下的平衡控制方法和控制信号检测的方法。对于控制所需要的信号，包括电压和无功电流的有效值、无功功率和功率因数等，给出了基于瞬时功率理论的信号检测方法。对所提出的方法进行仿真并将该方法应用于近期研制的SVC样机的设计，结果表明，它们是快速有效和准确的，具有实际的工程应用价值。