Decentralized adaptive output regulation for a class of large-scale nonlinear systems

We address the output regulation problem for a class of large-scale nonlinear systems with a neutrally stable uncertain exosystem via a decentralized error feedback adaptive control strategy.     

Best tracking and regulation performance under control energy constraint

This paper studies optimal tracking and regulation control problems, in which objective functions of tracking error and regulated response, defined by integral square measures, are to be minimized jointly with the control effort, where the latter is measured by the plant input energy. Our primary objective in this work is to search for fundamental design limitations beyond those known to be imposed by nonminimum phase zeros, unstable poles, and time delays. For this purpose, we solve the problems explicitly by deriving analytical expressions for the best achievable performance. It is found that this performance limit depends not only on the plant nonminimum phase zeros, time delays, and unstable poles-a fact known previously-but also on the plant gain in the entire frequency range. The results thus reveal and quantify another source of fundamental performance limitations beyond those already known, which are nonexistent when only conventional performance objectives such as tracking and regulation are addressed without taking into account the control energy constraint. Among other things, they exhibit how the lightly damped poles, the anti-resonant zeros, as well as the bandwidth of the plant may affect the performance.     

几种求作曲面交线的方法

通过实例介绍了应用辅助球面法、直线辅助投射法、空间透视仿射变换法等求作非回转曲面参与相贯的曲面交线的投影问题     

基于GSM短信息的智能温度监控系统的开发

介绍了一种以PIC系列单片机或个人电脑为控制核心的、基于GSM短信息的温度监控系统的硬件与软件设计。该系统采用了不同于一般TEXT或PDU的短信格式,具有更强的通用性和更好的可识别性。     

铝带箔精整机组圆盘剪的设计改进

本文分析了以往设计的铝带箔精整机组圆盘剪存在的问题，介绍了改进后的设计方案。新设计方案保证了圆盘剪精度的稳定性，提高了产品质量及生产效率。     

电路模拟方法在数学建模中的应用

本文采用电路模拟的方法来预测2008年北京奥运会体育场馆周围商区的消费需求情况.首先根据道路拓扑结构提取出相应电路结构,在每条导线(代表道路)上设置一个较大的控制电阻,根据电阻的阻值控制人流的流动规律,使电流和人流一样按一定比例选择可行的道路;同时在每条导线上串联一个较小的采样电阻,根据该电阻上的电压可求得该商区的人流量或消费需求.     

剪切场下聚合物结晶形态学研究进展

聚合物熔体被引入剪切场后，会发生与静态下不同的结晶现象。微观上可以得到伸直链晶体、片晶及串晶；宏观上除了静态下典型的球晶外，还能观察到球晶的变形和柱晶等。另外，剪切还可以使晶体发生晶型转变。本文对聚合物熔体在剪切场下结晶形态学的研究进展进行了介绍。     

300MW发电机几次故障分析

本文通过对双水内冷发电机运行中发生的几起特殊性故障的检查和处理方案的介绍,提出了一些相关改进措施,对同类机组的故障分析有一定参考价值.     

古代艺术如何融入现代包装设计

阐述了现代包装设计的产生、发展及其根源.从三个方面就如何把古代艺术有机地融入到现代包装设计中进行了探讨,以挖掘现代包装设计深厚的文化底蕴.     

包装工程专业英语教学研究

探讨了包装工程专业英语教学中所存在的问题,提出了切实可行的教学改革方案,旨在激发学生学习积极性和主动性从而提高教学质量和效果.