不确定双线性系统的滑模控制(英)

对双线性系统提出了滑模控制方法,此方法较好地改善了闭环系统在原点的运动特性并对外部有界干扰具有较好的鲁棒性,最后采用氨合成反应模型,进行了仿真实验．     

离散广义双线性系统的无源控制

研究了离散广义双线性系统在有界能量外部输入作用下的无源控制问题,利用线性矩阵不等式和广义代数R iccati不等式,给出离散广义双线性系统容许且严格无源的充分条件,并且基于此条件给出存在状态反馈控制器,使得闭环系统容许且严格无源的充分条件,同时提出了相应的控制器设计.     

基于Laguerre函数预测控制模型的仿人智能控制

模仿熟练操作者通过记忆预测控制复杂对象的思维方式,提出了根据仿人智能控制二次映射计算的控制量,预测其输出结果,提前作出调整。针对未知具体模型的系统,给出了laguerre函数自适应预测控制模型,设计出带有预测模型的仿人控制算法。仿真结果表明该预测模型的有效型和自适应性。     

双线性系统的含义及其特性

介绍了双线性系统的几类表达式，列举双线性系统在实际问题中的几个典型例子，提出双线性系统的几个特性，最后简要介绍双线性系统的研究概况．     

超超临界机组机炉协调系统的min-max模糊模型预测跟踪控制

为了提高非线性超超临界火电机组的控制性能,提出了一种改进的min-max模糊模型预测跟踪控制.首先,建立了 T-S模糊模型来近似非线性机炉协调系统的动态特性.然后,基于包含状态变量和输出变量的扩展模糊模型,在保证闭环系统稳定性和输入在给定约束的同时,推导了 min-max模糊模型预测跟踪控制用于输出调节.为了获得更大的...     

随机延迟网络中的时戳预测函数控制

针对网络控制系统中的随机延迟会恶化控制品质,甚至使系统变得不稳定这一问题,把标准预测函数控制算法推广到带随机延迟的网络控制系统中,提出了时戳预测函数控制算法.该算法通过时戳方法来估计网络在控制系统中引入的总延迟,根据系统离散的延迟状态空间模型来预测未来输出,并由预测函数控制的思想得到了适用于网络控制系统的控制规律.在基于TrueTime工具箱搭建的网络控制系统仿真平台上,对比了时戳预测函数算法和传统预测函数算法,系统响应曲线显示前者具有更好的控制品质.     

院校人才成长优化分析与结构控制研究

对院校人才成长环境进行了系统的分析,建立了院校人才成长环境系统的模型框图,对优化模型求解和参数确定进行初步探讨。借助于马氏链建立院校人才结构预测与控制的随机动态数学模型,对人才合理结构及结构控制问题给出了优化计算方法。     

一类不确定双线性系统的最优控制

文中利用了非线性系统中关系度的知识对具有扰动抑制的双线性系统进行了局部坐标变换,将系统进行了局部线性化处理,使得双线性系统的最优控制问题近似的转换为具有扰动抑制的线性系统的最优控制问题．然后使用已有的结论得到原双线性系统的最优控制,并同时得到了最坏扰动抑制．     

基于RBF核支持向量回归的模型预测控制仿真

RBF核函数的表达式较复杂,用于模型预测控制时滚动优化求解困难。该文建立一种基于RBF核SVR的预测控制模型,利用多智能体粒子群(MAPSO)算法求解模型预测控制中的滚动优化,推导出最优控制律,对其进行Matlab仿真并与其他方法进行比较。选取一个非线性系统及连续搅拌槽式反应器进行测试分析,结果表明:该预测模型能迅速抑制干扰,较快返回预设跟踪轨迹,展现了良好的抗噪、抗干扰能力。     

采用非线性模块的BP神经网络PID水位预测控制

因非线性时变控制系统造成的滞后,压水堆核电厂蒸汽发生器(SG)水位控制会引起的较大惯性或耦合,对此提出一种基于非线性模块的BP神经网络PID控制预测模块。采用BP神经网络模型作为非线性预测模块,调用SG水位PID控制运行数据作为非线性预测模块的训练样本;提取BP神经网络模型的输出数据作为BP神经网络PID的输入数据,多重优化BP神经网络的权值及阈值,缩小修正差值逼近系统整定值;构建SG水位非线性模块的预测数值与系统运行数据之间的非线性映射关系,修正带有预测判断方向的阈值,实现在线动态调整输出PID各参数的最优值。实验结果表明,预测模块可有效缩短系统的稳定阶跃响应周期,具有较高的计算精度。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.