PHEV动力总成控制器硬件在环仿真系统的研究

对硬件在环仿真系统进行了分析研究,在此基础上以dSPACE系统作为开发平台,构建了并联式混合动力电动汽车(PHEV)的动力总成控制器硬件在环仿真系统.在MATLAB/SIMULINK环境下,建立了并联式混合动力电动汽车的仿真模型,将模型编译到dSPACE系统中,进行接口的设计和监控的工作,建立了硬件在环仿真系统,并对仿真结果进行分析.     

混合动力电动汽车的建模与仿真研究

为预测和分析混合动力电动汽车的性能,在系统仿真软件Matlab环境中建立了某混合动力电动汽车的仿真模型以及相应的控制器模型,并对模型进行了纯电动和混合动力行驶工况下仿真分析.结果表明,实际的仿真车速、扭矩与驱动循环规定车速、扭矩相一致,因此所开发的仿真模型能够跟踪循环工况,从而验证了仿真模型的正确性,也为混合动力电动汽车的开发奠定了基础.     

基于智能递阶结构的HEV控制策略

混合动力电动汽车(HEV)的多能源动力总成控制器是实现多能源最优控制的关键,针对该包含多个子系统的复杂系统,提出了一类多模型方案,并采用了一种智能递阶监督控制策略·在智能递阶结构的上层,利用概率神经网络构成了组织级,对系统的任务进行规划;采用模糊决策控制器构成了递阶控制的协调级,将具体的任务分配给各个子系统·经过仿真研究,其结果表明了该方法的有效性·     

纯电动汽车开发又有新突破

由天津大学承担的“纯电动汽车动力总成控制系统及其相关技术的开发研究”项目通过了天津市科学技术委员会组织的科技成果鉴定。该成果成功开发了纯电动汽车主控制器、车载记录仪以及车载智能信息单元等装置，建立了控制策略仿真分析、硬件在线测试、在线监控标定、数据记录及分析、无线远程调控等一系列开发工具，形成了完整的开发平台。     

基于模型的双电机驱动电动汽车控制系统开发

为充分挖掘双电机双轴驱动电动汽车的潜力,针对其构型特点进行了整车控制系统的开发研究。采用基于模型设计的方法建立了各个模块的控制模型,并在此基础上进行了整车控制策略模型的集成开发;利用嵌入式代码生成技术,实现了由Simulink环境下的整车控制策略模型到系统控制应用层软件代码的自动生成。设计了整车控制器的硬件系统,完成了应用层软件与底层软件的集成设计。在NEDC工况下进行了控制系统硬件在环测试,结果表明本文开发的控制系统能够满足实际需求。     

面向动态过程的HEV模糊PID控制方法

提出面向动态过程的混合动力电动汽车(HEV)多能源动力系统控制方法. 针对城市公交HEV,建立HEV动力驱动模型,通过优化PID控制器参数实现提高HEV动态特性的目的. 同时为了解决提高HEV动态特性而引起其动力能量消耗增大的问题,提出面向动态过程的HEV模糊PID控制方法,在线确定控制系统的PID离散控制参数的变化规律,控制HEV多能源动力总成工作. 仿真结果表明,该方法既能保证HEV动态特性良好,又能有效控制HEV动力源输出,使HEV节能目标得以真正实现.     

模糊逻辑控制在并联混合动力汽车中的应用

混合动力汽车(HEV)最关键的开发环节之一是动力传动系统的工作模式、控制策略和能量传递方式的研究。文章介绍了并联混合动力电动汽车的控制策略,对美国能源部可再生能源实验室开发的ADVISOR2002仿真软件的控制策略进行了分析,重点介绍了模糊控制策略的应用。     

以RCP平台为支撑的电动汽车整车控制器软件开发研究

<正>本文以电动汽车为研究对象，基于RCP（快速控制原型）平台，在原整车控制器硬件基础上，运用ECoCoder（全自动代码生成工具）自动生成整车控制器软件开发平台；最后借助MeCa软件对整车控制器进行实时标定和代码刷新，进而完成整个开发工作。     

基于Simulink与以太网的过程控制系统的快速实现

提供了一种简便的方法,把建模、仿真和实现集成在NetCon系统中,提高了过程控制系统的开发效率.首先在Simulink中建立仿真模型,然后使用NetCon系统模板快速生成可执行代码,通过以太网或因特网下载到控制器硬件中,最后使用监控软件通过网络实时在线监控模型的运行状况,如观察结果、修改模型参数等.在此方法的基础上,建立增量式PID控制器模型,增加自动手动无扰切换功能,完成了液位过程控制系统的实例.结果表明,该方法的有效性和快速性,可以应用在类似的过程控制系统中.     

基于CRUISE的PHEV控制策略参数仿真

并联式混合动力电动汽车（PHEC）通过恰当的控制策略使内燃机动力源和电力动力源协调配合,实现最佳能量分配,既能保持电动汽车超低排放的优点,又能发挥传统内燃机汽车高比能量的长处．运用CRUISE软件建立了仿真模型,设计了并联电助力式控制策略,利用建立的仿真软件进行了控制策略及控制参数的仿真研究．仿真结果表明,根据不同的控制要求,调整相应的控制参数,可以改善整车性能．     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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