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Control algorithm and energy management strategy for extended range electric tractors

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International Journal of Agricultural and Biological Engineering 2017年第5期10卷 35-44页

作者： Xu Liyou Zhang Junjiang liu Mengnan Zhou Zhili liu chengqiang College of Vehicle and Traffic Engineering Henan University of Science and TechnologyLuoyang 471003China Shandong Shifeng Group Co. Ltd.Liaocheng 252800China

It is difficult to make full use of the electrical energy of the power battery for extended-range electric tractors because the battery’s state of charge may be relatively high at the end of the running *** address this situation,this paper aimed to study the control parameter adjustment in relation to the power battery’s electrical consumption and the diesel engine’s fuel consumption energy management *** on the AVL-Cruise simulation platform,the vehicle model of the tractor was established,and the control module of AVL-Cruise was used to compile the energy management *** order to verify the superiority of the proposed strategy,the contrast strategy was employed in terms of the diesel engine start and stop control plus fixed point energy management strategy(FPEMS).The applicability of the proposed strategy was tested through continuous transfer operation and the small area deep loosening *** simulation results show that the proposed strategy was of good *** with the FPEMS,the fuel consumption reduced significantly,and the electrical consumption of the power battery increased obviously.

关键词： extended-range electric tractor parameter adjustment energy management strategy simulation analysis

Simulation and Experimental Study on Influence of Multi⁃port Integrated Hydraulic Transformer Port Number on Transformer Ratio Characteristics

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Journal of Harbin Institute of Technology(New Series) 2021年第6期28卷 80-90页

作者： chengqiang liu Nianning Luo Chang liu Lianquan Zhou Lei Zhang School of Mechanical and Electrical Engineering Xuzhou University of TechnologyXuzhou 221018JiangsuChina School of Naval Architecture and Ocean Engineering Harbin Institute of Technology(Weihai)Weihai 264209ShandongChina School of Mechatronic Engineering Jiangsu Normal UniversityXuzhou 221116JiangsuChina

The integrated hydraulic transformer has a compact structure and no throttling loss in the process of pressure *** is widely used in the common pressure rail hydrostatic transmission *** integrated hydraulic transformer is realized by designing more than three ports on the distribution plate,and the voltage transformation characteristics of the integrated hydraulic transformer with different port numbers are *** this paper,the influence of port number on the pressure ratio of integrated hydraulic transformer was studied,and the pressure ratio characteristics of 3⁃ports,4⁃ports,and 5⁃ports integrated hydraulic transformer were obtained,and an experimental platform was built for experimental verification,which shows that the simulation results are consistent with the experimental results and provides a theoretical basis for the design of integrated hydraulic transformer.

关键词： integrated hydraulic transformer port number of valve plate pressure ratio simulation and experimental research

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Molecular mechanisms of direct and indirect interplay between amyloid𝛽β42 oligomer and characteristic lipids

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ChemPhysMater 2022年第4期1卷 310-320页

作者： Jinfei Mei chengqiang liu Huijuan Yang Xiaohong Ma Hongqi Ai School of Chemistry and Chemical Engineering University of JinanJinan 250022China

Accumulating evidence suggests that toxicity in patients with Alzheimer’s disease originates from the deposition of Aβ42 aggregates on the neuronal cell ***,the molecular mechanism underlying Aβ42 aggrega-tion on the surface of different lipids is poorly *** this study,coarse-grained and all-atomic molecular dynamics(MD)simulations were used to characterize the assembly process of two Aβ42 pentameric oligomers and the perturbation“footprints”of three characteristic lipid constitute bilayer membranes:POPC,POPG,and their hybrid PcPg composed of POPG and POPC in a 1:3 *** results revealed that the Aβ decamer was first formed in the water phase prior to its contact with the lipid surface,indicating that the water phase plays an incubation role in Aβ42 oligomer ***,the presence of any of the three lipids accelerated the assembly process of the two Aβ42 *** aggregation rate and aggregate conformation were strictly dependent on lipid charge,oligomer size,and degree of *** turn,the presence of oligomer impacted the surface of the lipid,generating a clear perturbation“footprint”,regardless of whether the interplay was direct or indirect,revealing for the first time that the indirect interaction is not seamless and can be detected clearly at the molecular *** interplay stands for the non-contacting interaction interfaced by the water phase,indicating a metastable state with long-range interaction under non-shaking *** results reveal the crucial role of non-contacting interactions in determining the phase status of zwitterionic membranes.

关键词： Aβoligomers Lipid membrane destruction Aggregation Molecular mechanism Water phase

Study on the Fluid-Solid Coupling Seepage of the Deep Tight Reservoir Based on 3D Digital Core Modeling

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Energy Engineering 2025年第2期122卷 537-560页

作者： Haijun Yang Zhenzhong Cai Hui Zhang Chong Sun Jing Li Xiaoyu Meng Chen liu chengqiang Yang PetroChina Tarim Oilfield Company Korla841000China CNPC R&D Center for Ultra-Deep Complex Reservoir Exploration and Development Korla841000China National Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao266580China Structure and Shipping Department Offshore Oil Engineering(Qingdao)Co.Ltd.Qingdao266520China

Deep tight reservoirs exhibit complex stress and seepage fields due to varying pore structures,thus the seepage characteristics are significant for enhancing oil *** study conducted triaxial compression and permeability tests to investigate the mechanical and seepage properties of tight sandstone.A digital core of tight sandstone was built using Computed Tomography(CT)scanning,which was divided into matrix and pore phases by a pore equivalent diameter threshold.A fluid-solid coupling model was established to investigate the seepage characteristics at *** results showed that increasing the confining pressure decreased porosity,permeability,and flow velocity,with the pore phase becoming the dominant seepage *** and large pores closed first under increasing pressure,resulted in a steep drop in ***,permeability slightly decreased under high confining pressure,which followed a first-order exponential *** velocity increased with seepage *** the damage mainly occurred in stress-concentration regions under low seepage *** behavior followed linear Darcy flow,the damage emerged at seepage entrances under high pressure,which decreased rock elastic modulus and significantly increased permeability.

关键词： Digital core fluid-solid coupling pore structure microscopic seepage

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电液伺服斜盘柱塞式液压变压器配流盘缓冲槽

哈尔滨工业大学学报 2013年第7期45卷 53-56页

作者：刘成强姜继海高丽新杨冠中哈尔滨工业大学机电工程学院哈尔滨150080

为了减小电液伺服斜盘柱塞式液压变压器的压力冲击,降低噪声,提高其运行平稳性,本文基于ADINA软件的流固耦合功能对液压变压器的配流盘缓冲槽进行了研究.在Pro/E中建立了配流结构的流体模型和固体模型,导入到ADINA软件中建立有限元模型... 详细信息

为了减小电液伺服斜盘柱塞式液压变压器的压力冲击,降低噪声,提高其运行平稳性,本文基于ADINA软件的流固耦合功能对液压变压器的配流盘缓冲槽进行了研究.在Pro/E中建立了配流结构的流体模型和固体模型,导入到ADINA软件中建立有限元模型,分析了配流缓冲结构的流场,并对结构进行了有限元校核,设计制造了带有三角槽缓冲结构的配流盘,基于搭建的液压变压器实验台进行了实验研究.结果表明所设计的配流盘能够使液压变压器运行平稳,最低转速达到35 r/min,噪声显著降低,可靠性明显提高,验证了理论分析的正确性.

关键词：液压变压器 ADINA 流固耦合配流盘缓冲槽研究

基于CFD与ε-NTU法的工程车辆散热性能预估

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华中科技大学学报（自然科学版） 2016年第8期44卷 6-10页

作者：刘佳鑫蒋炎坤秦四成刘成强华中科技大学能源与动力工程学院湖北武汉430074 华北理工大学机械工程学院河北唐山063009 吉林大学机械科学与工程学院吉林长春130025

为提高车辆散热系统选型设计效率,了解车辆散热系统工作性能,采用CFD数值模拟对散热器单元体进行分析,提取所需参数拟合性能曲线;将散热器压力损失转换为三维模型参数,在虚拟风洞内进行数值模拟,获得动力舱进风系数;将所得参数代入ε-NT... 详细信息

为提高车辆散热系统选型设计效率,了解车辆散热系统工作性能,采用CFD数值模拟对散热器单元体进行分析,提取所需参数拟合性能曲线;将散热器压力损失转换为三维模型参数,在虚拟风洞内进行数值模拟,获得动力舱进风系数;将所得参数代入ε-NTU中求解,对车辆动力舱内实际散热性能进行预估.选用两种较为常见的车辆散热系统作为实例进行验算,将计算结果分别与三维CFD模拟仿真结果和实验数据相对照,结果表明:温度数值的最大误差出现在中冷器,约为7.89%,其余热介质平均误差约为2.29%,在可接受范围之内;该预估方法计算精度略低于三维CFD仿真,但计算周期短、扩展性强、相对简单、更为实用,更适用于散热系统选型及车辆动力舱内实际散热性能的预估.

关键词：工程车辆散热性能 CFD分析数值模拟预估方法

基于ADINA的摆动液压马达设计与位置控制试验研究

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机床与液压 2019年第7期47卷 10-13页

作者：刘成强杜博然徐州工程学院机电工程学院江苏徐州221018 哈尔滨工业大学机电工程学院黑龙江哈尔滨150001

摆动液压马达功率密度比大、动态响应快,在伺服仿真转台等领域有着广泛的应用。为驱动负载进行100°范围内的摆动运动,基于ADINA有限元分析软件对摆动液压马达进行了分析,搭建了试验台,进行了摆动角度的位置控制试验研究。实验表明:在... 详细信息

摆动液压马达功率密度比大、动态响应快,在伺服仿真转台等领域有着广泛的应用。为驱动负载进行100°范围内的摆动运动,基于ADINA有限元分析软件对摆动液压马达进行了分析,搭建了试验台,进行了摆动角度的位置控制试验研究。实验表明:在该试验测试系统中,摆动液压马达的最大速度90°/s,最小速度约0.02°/s。基于该试验台,可以继续进行摆动液压马达密封性能和控制策略方面的深入研究。

关键词：摆动液压马达有限元液压传动

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地层水在固井水泥中的渗透及对套管的腐蚀

石油学报 2010年第2期31卷 322-332页

作者：任呈强郭小阳刘丽郭明林王煦西南石油大学材料科学与工程学院四川成都610500

介质渗透是固井水泥发生各种腐蚀的必要条件,也是套管外壁发生腐蚀的首要条件。模拟固井水泥的实际应用环境,将套管钢嵌入G级固井水泥中,采用开路电位法和动电位扫描极化法,研究了含饱和CO2地层水介质在水泥中的渗透和套管的腐蚀。结果... 详细信息

介质渗透是固井水泥发生各种腐蚀的必要条件,也是套管外壁发生腐蚀的首要条件。模拟固井水泥的实际应用环境,将套管钢嵌入G级固井水泥中,采用开路电位法和动电位扫描极化法,研究了含饱和CO2地层水介质在水泥中的渗透和套管的腐蚀。结果表明,动电位扫描极化法和半电位法都便于测定介质在固井水泥中的渗透时间。由极化曲线特征可知氯离子发生了优先渗透,水泥包覆下套管的腐蚀受阳极过程的电化学和扩散步骤共同控制。介质在水泥中渗透初期,钢的腐蚀速率很低,CO2的渗入起到了阳极去极化的作用,使钢的腐蚀逐渐增大,并最终形成较严重的局部腐蚀。固井水泥的渗透深度与时间呈幂函数关系,指前因子和幂指数分别为0.85和0.62,故随着水泥环厚度增大,渗透时间缓慢增加。

关键词：固井水泥渗透性二氧化碳地层水套管腐蚀

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出口环量分布对泵诱导轮性能的影响

排灌机械工程学报 2019年第1期37卷 18-24页

作者：杨敬江刘成强陈汇龙沈宇翔江苏大学国家水泵及系统工程技术研究中心江苏镇江212013 江苏大学能源与动力工程学院江苏镇江212013

为减少对经验参数的依赖性,在诱导轮设计过程中引入出口环量分布规律来控制叶片不同叶高处安放角,根据3种不同函数表达式的出口环量分布,设计了3种不同类型的诱导轮,并通过数值计算的方法,研究了出口环量分布对诱导轮性能的影响.水力设... 详细信息

为减少对经验参数的依赖性,在诱导轮设计过程中引入出口环量分布规律来控制叶片不同叶高处安放角,根据3种不同函数表达式的出口环量分布,设计了3种不同类型的诱导轮,并通过数值计算的方法,研究了出口环量分布对诱导轮性能的影响.水力设计结果表明:出口环量分布规律可作为诱导轮设计的控制参数,它直接影响诱导轮的包角大小和叶片长度.数值计算结果表明:减小轮毂侧环量,增大轮缘侧环量,可防止叶片轮毂因安放角过大而扭曲严重,进而提高叶片水力效率;同等流量下,二次递增型诱导轮扬程最高,有利于提高离心轮的抗汽蚀性能;二次递增型诱导轮综合性能最好,而线性递增型诱导轮综合性能最差;水平型诱导轮内部流场最稳定,但进口轮缘处有较强旋涡产生.因此,在诱导轮设计过程中,选用二次递增型出口环量分布较为合理.

关键词：诱导轮环量分布数值模拟空化水力设计