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混合润滑状态下渐开线直齿轮啮合效率分析

同济大学学报（自然科学版） 2014年第12期42卷 1904-1911页

作者：王斌陈辛波同济大学汽车学院上海201804 盐城工学院机械学院江苏盐城224051 同济大学新能源汽车工程中心上海201804

针对齿轮通常在混合润滑状态下工作的实际情况,对齿轮啮合面进行受力分析,结合弹流润滑和边界润滑两种摩擦系数,建立了混合润滑状态下的动态摩擦系数数学模型.建立了以瞬时压力角为变量的齿轮滑动摩擦功耗和滚动摩擦功耗数学模型,避免... 详细信息

针对齿轮通常在混合润滑状态下工作的实际情况,对齿轮啮合面进行受力分析,结合弹流润滑和边界润滑两种摩擦系数,建立了混合润滑状态下的动态摩擦系数数学模型.建立了以瞬时压力角为变量的齿轮滑动摩擦功耗和滚动摩擦功耗数学模型,避免了现有的沿啮合线积分的功耗模型存在原理误差的问题.最后,对提出的混合润滑状态下渐开线直齿轮啮合功耗进行仿真,并与弹流润滑仿真、实验数据进行比较分析,验证了混合润滑状态下渐开线直齿轮摩擦系数模型以及啮合效率模型的可行性.

关键词：混合润滑弹流润滑边界润滑齿轮啮合效率动态摩擦系数

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双横臂扭杆悬架力学特性的非线性分析与设计

同济大学学报（自然科学版） 2006年第5期34卷 655-659页

作者：陈辛波赵锐同济大学汽车学院上海201804

在机构运动分析的基础上,导出了精确分析悬架受力、刚度和阻尼特性的基本公式,给出了按选定的偏频和相对阻尼比确定扭杆刚度和减震器阻尼参数的设计步骤.以此为理论基础,开发出了简明实用的双横臂扭杆悬架系统刚度和阻尼参数非线性分析... 详细信息

在机构运动分析的基础上,导出了精确分析悬架受力、刚度和阻尼特性的基本公式,给出了按选定的偏频和相对阻尼比确定扭杆刚度和减震器阻尼参数的设计步骤.以此为理论基础,开发出了简明实用的双横臂扭杆悬架系统刚度和阻尼参数非线性分析与设计软件.

关键词：车辆悬架减震器力刚度阻尼

High-resolution short-term prediction of the COVID-19 epidemic based on spatial-temporal model modified by historical meteorological data

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Fundamental Research 2024年第3期4卷 527-539页

作者： Bin chen Ruming chen Lin Zhao Yuxiang Ren Li Zhang Yingjie Zhao xinbo Lian Wei Yan Shuoyuan Gao College of Atmospheric Sciences Lanzhou UniversityLanzhou 730000China Collaborative Innovation Center of Western Ecological Security Lanzhou UniversityLanzhou 730000China

In the global challenge of Coronavirus disease 2019(COVID-19)pandemic,accurate prediction of daily new cases is crucial for epidemic prevention and socioeconomic *** contrast to traditional local,one-dimensional time-series data-based infection models,the study introduces an innovative approach by formulating the short-term prediction problem of new cases in a region as multidimensional,gridded time series for both input and prediction targets.A spatial-temporal depth prediction model for COVID-19(ConvLSTM)is presented,and further ConvLSTM by integrating historical meteorological factors(Meteor-ConvLSTM)is refined,considering the influence of meteorological factors on the propagation of *** correlation between 10 meteorological factors and the dynamic progression of COVID-19 was evaluated,employing spatial analysis techniques(spatial autocorrelation analysis,trend surface analysis,etc.)to describe the spatial and temporal characteristics of the *** the original ConvLSTM,an artificial neural network layer is introduced to learn how meteorological factors impact the infection spread,providing a 5-day forecast at a 0.01°×0.01°pixel *** results using real dataset from the 3.15 outbreak in Shanghai demonstrate the efficacy of Meteor-ConvLSTM,with reduced RMSE of 0.110 and increased R^(2) of 0.125(original ConvLSTM:RMSE=0.702,R^(2)=0.567;Meteor-ConvLSTM:RMSE=0.592,R^(2)=0.692),showcasing its utility for investigating the epidemiological characteristics,transmission dynamics,and epidemic development.

关键词： COVID-19 Prediction ConvLSTM Refined prediction Meteorological factors Spatial-temporal analysis

Metabolic profiles and morphological characteristics of leaf tips among different sweet potato(Ipomoea batatas Lam.)varieties

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Journal of Integrative Agriculture 2024年第2期23卷 494-510页

作者： Wenqing Tan xinbo Guo Zhangying Wang Rong Zhang Chaochen Tang Bingzhi Jiang Ruixue Jia Yuanyuan Deng Shaohai Yang Jingyi chen Crops Research Institute Guangdong Academy of Agricultural Sciences/Key Laboratory of Crop Genetic Improvement of Guangdong ProvinceGuangzhou 510640China School of Food Science and Engineering South China University of TechnologyGuangzhou 510640China Sericultural&Agri-Food Research Institute Guangdong Academy of Agricultural Sciences/Key Laboratory of Functional FoodsMinistry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Agricultural Products ProcessingGuangzhou 510610China

Sweet potato leaf tips have high nutritional value,and exploring the differences in the metabolic profiles of leaf tips among different sweet potato varieties can provide information to improve their *** this study,a UPLC-Q-Exactive Orbitrap/MS-based untargeted metabolomics method was used to evaluate the metabolites in leaf tips of 32 sweet potato *** varieties with distinct overall metabolic profiles(A01,A02,and A03),two varieties with distinct profiles of phenolic acids(A20 and A18),and three varieties with distinct profiles of flavonoids(A05,A12,and A16)were *** addition,a total of 163 and 29 differentially expressed metabolites correlated with the color and leaf shape of sweet potato leaf tips,respectively,were identified through morphological *** comparison analysis of the phenotypic traits and a metabolite-phenotypic trait correlation analysis indicated that the color differences of sweet potato leaf tips were markedly associated with ***,the level of polyphenols was correlated with the leaf shape of sweet potato leaf tips,with lobed leaf types having higher levels of polyphenols than the entire leaf *** findings on the metabolic profiles and differentially expressed metabolites associated with the morphology of sweet potato leaf tips can provide useful information for breeding sweet potato varieties with higher nutritional value.

关键词： sweet potato leaf tips phenotypic traits metabolic profile differentially expressed metabolites polyphenols

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基于弹流润滑的直齿轮动态效率模型及验证

同济大学学报（自然科学版） 2013年第5期41卷 773-778页

作者：陈辛波卢志坚同济大学新能源汽车工程中心上海201804

分析基于弹流润滑状态的直齿轮啮合特性及规律,考察摩擦因子、载荷分配及油膜厚度等关键因子的计算公式,建立基于MATLAB/Simulink的机械动态效率数学模型.以1对齿轮沿啮合线从啮入到啮出为1个周期,将啮合区间划分为4部分分别进行平均滑... 详细信息

分析基于弹流润滑状态的直齿轮啮合特性及规律,考察摩擦因子、载荷分配及油膜厚度等关键因子的计算公式,建立基于MATLAB/Simulink的机械动态效率数学模型.以1对齿轮沿啮合线从啮入到啮出为1个周期,将啮合区间划分为4部分分别进行平均滑动摩擦和滚动摩擦功耗的积分计算,同时为表征实际情况中润滑油粘度变化带来的影响引入润滑油粘度变化修正因子.仿真结果与试验数据及已有数学模型的对比分析验证了所建动态效率模型的准确性.

关键词：直齿轮动态效率数学模型摩擦因子粘度变化修正因子

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摇臂推杆式电磁主动悬架的鲁棒控制与优化

汽车工程 2018年第1期40卷 34-40页

作者：谷成殷珺陈辛波同济大学汽车学院上海201804 同济大学新能源汽车工程中心上海201804

针对被动悬架和半主动悬架在抑制车辆振动方面存在的不足,提出一种摇臂推杆式电磁主动悬架并试制样机,它具有结构新颖、加工容易和模块化设计等特点。对该悬架系统非线性特性进行分析,得到等效刚度和等效簧下质量等参数的摄动区间。在... 详细信息

针对被动悬架和半主动悬架在抑制车辆振动方面存在的不足,提出一种摇臂推杆式电磁主动悬架并试制样机,它具有结构新颖、加工容易和模块化设计等特点。对该悬架系统非线性特性进行分析,得到等效刚度和等效簧下质量等参数的摄动区间。在保证系统鲁棒稳定性的前提下,以车身加速度、悬架动行程、轮胎动位移和主动力最小作为优化目标,设计鲁棒H∞控制器。为降低控制器保守性,将车身质量参数摄动范围分段,优化设计自适应鲁棒H∞控制器,通过静态查表方式离线控制,保证实时性,且无需切换控制器,避免对乘员产生的冲击感。

关键词：电磁主动悬架摇臂推杆自适应鲁棒H∞控制优化

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基于效率优化的四轮独立驱动电动车转矩分配

同济大学学报（自然科学版） 2015年第10期43卷 1550-1556页

作者：谷成刘浩陈辛波同济大学汽车学院上海201804 同济大学新能源汽车工程中心上海201804

对某款四轮独立驱动电动汽车转矩分配控制策略对车辆经济性影响进行研究,基于理论与试验数据,建立关键零部件数学模型及整车能耗的MATLAB/Simulink仿真计算模型.以降低系统能耗为目标,提出一种基于驱传动系统效率优化的转矩分配控制策略... 详细信息

对某款四轮独立驱动电动汽车转矩分配控制策略对车辆经济性影响进行研究,基于理论与试验数据,建立关键零部件数学模型及整车能耗的MATLAB/Simulink仿真计算模型.以降低系统能耗为目标,提出一种基于驱传动系统效率优化的转矩分配控制策略,得到转矩分配系数MAP图,从而避免了在线计算的时效性问题.不同行驶工况下的仿真结果表明,与固定比例的转矩分配方法相比,基于转矩分配优化算法的系统能耗可降低约5%.

关键词：四轮独立驱动转矩分配能耗效率

Path Tracking Control of Four-wheel Independent Steering Electric Vehicles Based on Optimal Control

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Path Tracking Control of Four-wheel Independent Steering Ele...

A Chassis Load Dynamic Estimation Method for Distributed Drive Electric Loaders

第三十九届中国控制会议

作者： xinbo chen Yibing Peng Peng Hang Tingju Tang School of Automotive Studies Tongji University Clean Energy Automotive Engineering Center Tongji University

The four-wheel independent steering electric vehicle（4 WIS EV） with steer-by-wire（SBW） system features advanced lowspeed maneuverability and high-speed stability, which is considered as an ideal autonomous vehicle. Path tracking is an essentail part of the intelligent transportation applications. For 4 WIS EVs, the optimal control method is used in this pape to investigate the trajectory tracking issue. Firstly, a 2 degrees of freedom（DOF） vehicle dynamic model is established. The relation of the four wheel steering angles is derived based on the Ackermann geometry. The steering control rule is designed by minimizing the side slip angle. Based on the optimal control theory, linear quadratic regulator（LQR） is adopted to realize the optimal control of vehicle trajectory tracking. Using Carsim and Simulink, the co-simulation platform is built and simulation is conducted under different vehicle speeds and design parameters, which verifies that the designed LQR controller has good path tracking performance. To reduce the influence of the disturbance quantities on the control system, an improvement is applied to the controller and a state feedback-feedforward structure is formed. The simulation shows that the feedforward adjustment further reduces the tracking error. At last, the optimal controller is embedded in the vehicle control unit. Different sets of experiments with the double-lane-change and cosine reference trajectories are conducted. Experimental results show that the designed optimal control method can track the expected trajectories well and verify the stability performance of the algorithm.

关键词： Electric vehicle Independent steering path tracking optimal control experimental verification

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A Chassis Load Dynamic Estimation Method for Distributed Dri...