串联式混合动力汽车总成的控制策略和控制系统结构方案设计

1引言 混合动力汽车因其能大幅度降低油耗和减少排放,而得到了全球各大汽车公司的认可,并纷纷推出了自己的产品或实用样车.我国对混合动力汽车的研究才刚刚起步,对混合动力汽车总成的控制策略及控制系统结构方案的研究是开发研制混合动力汽车的基础.     

重视混合动力促进汽车工业可持续发展

2013年9月26日-27日,由中国汽车工业协会（CAAM）主办的＂混合动力汽车技术及推广研讨会＂在北京龙城丽宫国际酒店隆重召开.工信部装备司处长苏怀山、发改委产业协调司处长吴卫、科技部高新司处长李宏刚、国家税务总局处长赵东辉、财务部处长王守业、认监委处长王昆,以及国内外混合动力汽车及零部件企业领导,汽车行业专家、学者等200余名中外嘉宾参加了此次论坛.此次混合动力汽车技术及推广研讨会由主题论坛和试乘试驾活动组成,旨在搭建国内外汽车企业、政府机构、消费者之间沟通交流平台,实现技术交流、产品推广及政策法规领域经验共享,共同推动中国混合动力汽车商品化发展.此次研讨会充分展示了当前混合动力汽车技术发展,促进国内外汽车界的深入交流,促进全球汽车工业可持续发展.会议期间,与会代表共同探讨了混合动力汽车技术趋势、产品发展及推广应用等重要问题.     

发展混合动力汽车任重道远

混合动力汽车对我国汽车产业发展具有十分重要意义。日前,在中国汽车工业协会主办的混合动力汽车技术及推广研讨会上,有关专家和学者及汽车企业的研发人员就混合动力汽车技术发表了各自的看法与建议。王秉刚:汽车产业发展不可能绕过混合动力技术在混合动力汽车技术及推广研讨会上,国家863节能与新能源汽车监理咨询专家组组长王秉刚认为,电动汽车与燃料电池汽车能够彻底摆脱对石油的依赖,使用过程零排放,全寿命过程碳排放低,是未来汽车的主要方向。但是电动汽车在当前却面临着续驶里程短、电池价格贵、基础设施不完善等困难,需要相当一段时间的努力才可能逐步解决;而混合动力汽车在现阶段具备更好的产业化条件。     

对并联混合动力汽车控制模式探究受《浙江省大学生科技创新活动计划（新苗人才计划）》资助

随着科学技术的发展,特别是机械制造技术的发展,并联混合电力汽车成为现在电动汽车发展的主要方向。混合动力汽车在一定程度上解决了纯电动汽车在行驶里程和初始成本上的一些难题,使得混合动力汽车的行驶里程增加、初始成本降低。但是并联混合动力汽车在控制模式上还存在一定的问题,这些问题影响着并联混合动力汽车的发展。笔者将结合并联混合动力汽车的相关技术应用,对并联混合动力汽车的驱动系统、能量流动、工作模式等进行相关的研究,提出并联混合动力汽车控制模式的相关意见和建议。     

混合动力汽车现状及发展前景探究

从混合动力汽车的定义及其动力分类人手,介绍了其工作原理及优势,同时探讨了混合动力汽车产业化面临的问题及市场推广情况,并对混合动力汽车的发展前景进行了展望.     

并联型混合动力汽车控制系统研究

研究了混合动力车的结构,并根据混合动力汽车的行驶特性,提出了混合动力汽车控制系统,并对该控制系统的硬件结构和核心程序进行了介绍,最后指出混合动力汽车发展中需要注意的问题,提出今后的研究重点和方向。     

基于混合动力汽车动力性与经济性研究

本文针对混合动力汽车动力性与经济性研究,将从混合动力汽车的发展现状入手,结合混合动力汽车的技术分类及结构原理,对混合动力汽车动力性以及混合动力汽车经济性展开分析和论述。希望本文的研究能为节能低排高效汽车的研发提供参考性建议。     

混合动力汽车车内噪声分析与研究

基于供给侧改革的研究前提下,我国的综合国力和经济实力取得显著的成果,同时也促进了新能源汽车的发展。为此,需要采取相应的研究措施,进而提高混合动力汽车的性能,从而满足人们对动力汽车的基本需求。本文根据新能源汽车作为入手点,分析了混合动力汽车研究的重要性,深入研究混合动力汽车的噪声特点和产生的机制,为我国的高品质混合动力汽车研究奠定了基础。     

混合动力汽车发动机电机拖动技术研究

混合动力汽车发动机电机拖动技术应用在解决汽车能源应用紧缺及汽车排放污染问题等方面具有一定推进作用,使现代混合动力汽车应用更符合社会生态体系建设发展的基本需求,为后续阶段混合动力汽车电力动力驱动技术完善创设有利条件。本文将以混合动力汽车发动机电机拖动技术应用为核心,对其混合动力发动机电机的快速启动及阻力矩等相关问题做深入分析,以此为混合动力汽车发动机电机拖动技术的广泛运用提供部分参考性研究建议。     

一种串联式混合动力汽车控制策略研究及仿真分析

混合动力汽车是燃料汽车向电动车发展的过渡阶段,其中控制策略研究是混合动力汽车研究的关键问题之一。针对某种小型客车,本研究提出了一种串联式混合动力汽车的建模方法,并基于串联式混合动力汽车的动力传动系建模提出了一种控制策略。控制策略侧重于功率分配和多模态开关逻辑,通过matlab/simulink以US06作为循环工况进行的仿真验证,仿真结果表明该模型和控制策略简单有效,有一定的应用前景。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...     

分布动态载荷识别的抗噪处理

针对正交多项式频域法在用多种响应对矩形薄板进行载荷识别中抗噪性较差的问题,综合运用平均法、矩阵预处理和奇异值截断法等方法对之进行改善,并引入空间映射的思想,将该方法的应用范围拓展为复杂的模型.利用仿真算例,证实了该方法具有较好的抗噪性.     

基于MELTAC-N平台的核电厂安全级DCS环网研究与测试

针对工程实践中环网通讯相关问题的处理缺乏理论基础及国产化安全级DCS平台的开发缺乏成熟经验借鉴问题,对基于MELTAC-N平台核电厂安全级DCS环网的软硬件实现进行了研究。提出了安全级DCS环网双环网冗余设计、光切换开关设计等硬件设计方法,以及以RPR协议为基础,采用全数据收发策略的软件设计方法。在CPR1000安全级DCS平台上对安全级DCS环网的可靠性及实时性进行了评价,并进行了容错能力、响应时间及响应时间稳定性测试验证实验。结果表明,基于MELTAC-N平台安全级DCS环网软硬件设计具有较好的容错能力及响应时间稳定性。     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...     

End-to-End Multiview Gesture Recognition for Autonomous Car Parking System

The use of hand gestures can be the most intuitive human-machine interaction medium.The early approaches for hand gesture recognition used device-based methods....     

The laboratory simulation of abrasive wear

Abrasive wear has long been recognised as one of the most potentially serious tribological problems facing the operators of many types of plant and machinery; several industrial surveys have indicated that wear by abrasion can be responsible for more than 50% of unscheduled machine and plant stoppages. Locating the operating point of a tribological contact in an appropriate operational ‚map’︁ can provide a useful guide to the likely nature and origins of the surface degradation experienced in use, though care must be exercised in choosing the most suitable parameters for the axes of the plot. Laboratory testing of materials and simulations of machine contacts are carried out for a number of purposes; at one level for the very practical aims of ranking candidate materials or surface hardening treatments in order of their wear resistance, or in an attempt to predict wear lives under field conditions. More fundamentally, tests may be aimed at elucidating the essential physical mechanisms of surface damage and loss, with the longer term aim of building an analytical and predictive model of the wear process itself. In many cases, component surface damage is brought about by the ingress of hard, particulate matter into machine bearing or sealing clearances. These may be running dry although, more usually, a lubricant or service fluid is present at the interface. A number of standardised wear test geometries and procedures have been established for both two- and three-body wear situations, and these are briefly described. Although abrasive wear is often modelled as following an ‚Archard’︁ equation (i.e. a linear increase in material loss with both load and time, and an inverse dependence on specimen hardness) both industrial experience and laboratory tests of particularly lubricated contacts show that this is not always the case: increasing the hardness differential in an abrasively contaminated lubricated pair may not always reduce the rate of damage to the harder surface.     

ANGULAR DISTORTION ALLOWABLE VALUE AND ASSESS METHOD OF WELD ON COKE TOWER

A graph as the new engineering method for estimate the safety of bulging deformation of coke tower is proposed. Through stresses analysis of circumferential weld of coke tower and comparing the stresses produced by pressure with heat stress of steady state, residual stress, bending stress produced by both itself weight and wind loads, it showed that the stresses produced by pressure on the angle distortion are the main factor of equivalent stress of the combined stress. After comparing four kinds of stress controlling conditions, the relation to stress with depth of angular distortion, grade of curvature of angular distortion and half of region of angular distortion has been inferred. Graph of deformation allowable value of coke tower for different condition by angular distortion and half of region of angular distortion has been plotted. The five steps for its engineering use have been explained. The lighter the grade of curvature is, the larger of bulge allowance, may be, and the bigger of depth of angular distortion may pose too. For the coke tower with a popular structure of Dg 5 400 mm×28 mm, the result by graph is nearly more than the result of two formulas formed by other research, the error is less than 7.0%. But, the graph can be easily applied to different size of angular distortion.