基于遗传算法的电动助力转向系统结构参数优化设计

分析了电动机的转动惯量、转矩传感器刚度、减速机构减速比对汽车操纵稳定性的影响,采用汽车操纵稳定性评价指标确定目标函数,利用遗传算法对电动助力转向系统结构参数进行了优化,并对参数优化前后系统性能进行仿真对比.     

基于PLC的电动助力转向系统研究

在分析汽车电动助力转向系统的工作原理基础上,设计了基于三菱PLC控制的汽车电动助力转向系统.并利用PLC软件对EPS系统进行了仿真.仿真结果表明,该系统有较好的转向轻便性,能较好地协调不同车速时的转向轻便性和路感要求.     

汽车主动悬架及电动转向系统模拟实验装置的研究与开发

主动悬架系统和电动转向系统分属于现代汽车不同的底盘系统,但它们之间相互作用、相互影响.文章以LS430主动悬架系统和电动助力转向系统为研究对象,在应用原车配件的基础上设计开发了主动悬架及电动转向系统模拟实验装置,通过本系统不仅能够清楚地了解主动悬架及电动助力转向系统的结构组成,提取不同的传感器数据波形、动态数据流等,而且能够再现原车主动悬架和电动转向系统的控制策略和控制过程,同时利用该模拟实验装置,能够方便学校教学和企业培训.     

汽车转向技术现状与发展趋势

本文概述了汽车不同类型转向系统的特点,分析了国内外电动助力转向技术的发展现状,展望了电动助力转向技术的发展趋势。     

汽车转向系统研究综述

介绍了汽车转向系统的功用,在分析机械转向系统、液压动力转向系统、电控液压动力转向系统、电动助力转向系统、线控转向系统特点的基础上,着重阐述了电动助力转向系统的结构原理、关键部件及特点,对比分析了3种不同转向系统的性能,并指出未来汽车转向系统的发展趋势。     

电动转向系统助力特性仿真研究

助力性能直接关系到汽车转向操作的安全.现以电动助力转向系统的跟踪性能和稳定性为控制系统设计目标,将经典控制理论PID控制理论应用于控制系统设计,创建了电动助力转向系统机电一体化仿真模型.计算机仿真结果证实,所设计的电动转向系统具有良好的跟踪性能和稳定性,仿真结果为电动转向系统的设计提供了依据.     

基于模糊PID电流跟踪控制的EPS仿真分析

在对电动助力转向系统(EPS)结构分析的基础上,结合汽车动力学特性建立EPS数学模型,依靠Simulink平台搭建了EPS系统仿真模型.本文采用模糊自适应PID控制策略对电机目标电流进行跟踪控制,并且为抑制路面干扰对电机电流采取了补偿措施.在不同路面和不同车速下对系统的常规助力控制,阻尼控制进行仿真分析,仿真结果表明了该控制策略的有效性和实用性,目标电流跟踪效果良好.与无助力系统相比,汽车方向盘操纵转矩明显降低,驾驶员获得了良好的转向路感,系统能有效抑制颠簸路面对方向盘的冲击.     

浅谈中职汽修教育中汽车转向系统的教学

随着汽车工业日新月异的发展,汽车转向系统发生了革命性的变化,由机械转向系统、液压动力转向系统、电控液压动力转向系统发展到电动助力转向系统。因此,应对中职汽修教育中汽车转向系统的教学进行研究与探索。     

汽车电动助力转向系统

对目前汽车配置的助力转向系统做了简要比较,指出了机械液压和电子液压助力的缺点。介绍了电动助力转向系统的构成、工作原理以及主要设计参数和控制特性。     

电动助力转向系统中控制器的设计

介绍了电动助力转向系统（EPS）的构成及工作原理,着重讨论了电动助力系统中控制器的硬件组成及其原理;简要介绍了电动助力转向系统的软件设计,并进行了助力电流试验。结果表明,自主开发的EPS系统助力效果明显,操作手感好,满足转向性能要求。     

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?     

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…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

The Reader Response Approach to Teaching of English Literature

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.