共查询到20条相似文献，搜索用时 109 毫秒
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提出一种模糊控制规则可自适应调整的控制算法.该算法利用模糊逻辑系统构建模糊辨识器和模糊控制器,依据辨识器在线预估输出误差与模糊控制规则相关参数优化之间的内在联系及自适应优化模糊控制规则.仿真实验表明了该算法的有效性. 相似文献
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杨纪寿 《柳州职业技术学院学报》2009,9(2):66-70
三级倒立摆系统有8个状态变量,直接设计模糊控制器必然会导致规则爆炸,推理时间过长,控制器的实时性难以满足系统快速性的要求。小车位移以及速度与摆杆角度及摆杆角速度存在很大的耦合关系,融合函数实现了将单一模糊控制策略转化为多级控制策略嵌套,实现输入变量的降维。实验结果表明基于信息融合的模糊控制算法使系统具有良好的动态特性和一定的鲁棒性。 相似文献
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模糊PID控制的遗传算法优化 总被引：1，自引：0，他引：1
訾兴建 《淮北职业技术学院学报》2007,6(5):53-55
模糊控制中的模糊推理规则和隶属函数的选取往往依据专家或技术人员的经验,具有较大的人为主观性,尤其在较强的非线性系统和未知动态环境条件下,其控制性能往往达不到客观要求。本文采用改进的遗传算法优化模糊控制中的比例因子,从而对控制规则和隶属函数进行优化。仿真结果表明,经过优化后的模糊控制器控制规则和隶属函数更加客观合理,控制系统的动、静态性能都有较大提高。 相似文献
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叶润玉 《福建工程学院学报》2006,4(6):818-821
传统PID控制器参数的整定是在获取对象数学模型的基础上，根据某一整定规则来确定的。难以适应复杂多变的控制系统。文章应用模糊控制技术，设计一种二输入三输出自适应模糊PID控制器，对锅炉水位进行控制。利用MATLAB对控制系统进行仿真，结果表明，该控制器白适应能力及鲁棒性比传统PID控制器更强。 相似文献
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通过介绍一种模糊控制器的设计方法,给出了模糊控制器设计的算法流程图及输入量量化程序、模糊控制表查询程序等关键步骤,以此方法设计的模糊控制器由输入量模糊化接口、规则库、推理算法和输出去模糊接口四个部分组成,其结构简单、使用方便,具有广阔的应用前景。 相似文献
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针对电石炉的三相电极电流耦合和PLC的控制特点,提出了一种基于PLC的模糊控制方法,将多变量模糊控制器分解成3个多输入-单输出的模糊控制器.系统硬件由PLC及其输入/输出模块组成,其控制功能由PLC程序实现,并成功应用电石炉控制系统中,实现了电极调节的模糊解耦控制.现场运行数据表明,该控制系统可靠性高,控制效果良好. 相似文献
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钟宇明 《深圳职业技术学院学报》2012,11(3):13-17
与经典的PID控制器不同,模糊控制不需要获取系统精确的数学模型．根据系统的要求,设计模糊控制器,以给定参考电压与实际电压之间的偏差及其微分作为输入,通过合理的推理规则,得到占空比输出,去控制开关管的开关时间．论述了模糊控制器的详细设计过程,以及在MATLAB中建立仿真模型的过程．仿真结果表明系统具有较好的稳态和动态性能． 相似文献
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基于过半可信原则的三I算法模糊控制器及其响应能力 总被引：2，自引：2，他引：0
彭家寅 《内江师范学院学报》2009,24(10):5-15
给出了49个模糊蕴涵算子基于过半可信原则的三I算法的表达式,在此基础上详细讨论这49个模糊蕴涵算子基于过半可信原则三I算法构成的单输入单输出和双输入单输出模糊控制器,并分析了它们的响应能力．结果表明：在这49个模糊蕴涵算子中,只有一个模糊蕴涵箅子基于过半可信原则三I算法构成的模糊控制器具有函数的泛逼近性;另有一个模糊蕴涵算子基于过半可信原则三I算法构成的模糊控制器近似为拟合函数;44个模糊蕴涵算子基于过半可信原则三I算法构成的模糊控制器只具有阶跃响应能力;3个模糊蕴涵算子基于过半可信原则三I算法构成的模糊控制器为未定型． 相似文献
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汽车磁流变半主动悬架的模糊控制 总被引：1，自引：0，他引：1
为带有磁流变液智能阻尼器的半主动汽车悬架系统设计了一种模糊控制器：将半主动悬架相对位移的误差及误差变化率作为模糊控制器的输入,阻尼力作为其输出,利用磁流变液智能阻尼器的阻尼力随电流变化的特性使车身的振动降到最小。仿真实验给出了最优被动悬架和模糊控制智能半主动悬架在随机路面激励情况下的响应曲线,结果表明,磁流变半主动悬架系统采用模糊控制效果较理想,其车身垂直加速度等参数变化幅度也有所降低。 相似文献
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《海外英语》2007,(5):10-11
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? 相似文献
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《海外英语》2007,(4):36
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. 相似文献
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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. 相似文献
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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. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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唐芳 《读与写:教育教学刊》2008,5(6)
During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context. 相似文献