检索结果-南通市图书馆

Cascade Optimization Control of Unmanned Vehicle Path Tracking Under Harsh Driving Conditions

Journal of Shanghai Jiaotong university(Science) 2023年第1期28卷 114-125页

作者：黄迎港罗文广黄丹蓝红莉 School of Electrical and Information Engineering、guangxi key laboratory of Auto Parts and Vehicle technology Guangxi University of Science and TechnologyLiuzhou 545006GuangxiChina School of Mechanical and Automotive Engineering South China University of TechnologyGuangzhou 510641China

Under ultra-high-speed and harsh conditions,conventional control methods struggle to ensure the path tracking accuracy and driving stability of unmanned vehicles during the turning ***,this study proposes a cascade control to solve this *** on the new vehicle error model that considers vehicle tire sideslip and road curvature,the feedforward-parametric adaptive linear quadratic regulator(LQR)and proportional integral control-based speed-keeping controllers are used to compose the path-tracking cascade optimization controller for unmanned *** improve the adaptability of the unmanned vehicle path-tracking control under harsh driving conditions,the LQR controller parameters are automatically adjusted using a back-propagation neural network,in which the initial weights and thresholds are optimized using the improved grey wolf optimization algorithm according to the driving *** speed-keeping controller reduces the impact on the curve-tracking accuracy under nonlinear vehicle speed ***,a joint model of MATLAB/Simulink and CarSim was established,and simulations show that the proposed control method can achieve stable entry and exit curves at ultra-high speeds for unmanned *** strong wind and ice road conditions,the method exhibits a higher tracking accuracy and is more adaptive and robust to external interference in driving and variable curvature roads than methods such as the feedforward-LQR,preview and pure pursuit controls.

关键词： unmanned vehicles path tracking harsh driving conditions cascade control improved gray wolf optimization algorithm backpropagation neural network

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Safety Evaluation of Commercial Vehicle Driving Behavior Using the AHP–CRITIC Algorithm

引用

Journal of Shanghai Jiaotong university(Science) 2023年第1期28卷 126-135页

作者：庞娜罗文广吴若园蓝红莉覃永新苏琦 School of Electrical and Information Engineering Guangxi Key Laboratory of Auto Parts and Vehicle TechnologyGuangxi University of Science and TechnologyLiuzhou 545006GuangxiChina Liuzhou OVM Machinery Co. Ltd.Liuzhou 545005GuangxiChina

To prevent and reduce road traffic accidents and improve driver safety awareness and bad driving be-haviors,we propose a safety evaluation method for commercial vehicle driving *** driving style clas-sification indexes were extracted using driving data from commercial vehicles and four primary and ten secondary safety evaluation *** on the stability of commercial vehicles transporting goods,the acceleration index is divided into three levels according to the statistical third quartile,and the evaluation expression of the safety index evaluation is *** were divided into conservative,moderate,and radical using K-means++.The weights corresponding to each index were calculated using a combination of the analytic hierarchy process(AHP)and criteria importance through intercriteria correlation(CRITIC),and the driving behavior scores of various drivers were calculated according to the safety index score *** established AHP-CRITIC safety evaluation model was verified using the actual driving behavior data of commercial vehicle *** calculation results show that the proposed evaluation model can clearly distinguish between the types of drivers with different driving styles,verifying its rationality and *** evaluation results can provide a reference for transportation management departments and enterprises.

关键词： commercial vehicle driving behavior analytic hierarchy process(AHP) criteria importance through intercriteria correlation(CRITIC) safety evaluation driving style

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于荧光动力学技术的黄渤海初级生产力快速测量

引用

光谱学与光谱分析 2022年第3期42卷 990-996页

作者：王翔殷高方赵南京甘婷婷杨瑞芳覃志松董鸣陈敏丁志超亓培龙王璐马明俊孟德硕刘建国中国科学院安徽光学精密机械研究所环境光学与技术重点实验室安徽合肥230031 中国科学技术大学安徽合肥230026 桂林电子科技大学计算机与信息安全学院广西桂林541004

浮游植物初级生产作为海洋生态系统的重要起点,是海洋食物网的基础,是衡量海水质量的重要指标。为了准确测量、监测和预测浮游植物初级生产力的时空变化及其对外部环境条件的动力学响应,研究了一种基于叶绿素荧光动力学的测量技术,研制... 详细信息

浮游植物初级生产作为海洋生态系统的重要起点,是海洋食物网的基础,是衡量海水质量的重要指标。为了准确测量、监测和预测浮游植物初级生产力的时空变化及其对外部环境条件的动力学响应,研究了一种基于叶绿素荧光动力学的测量技术,研制出响应时间为1.6min、精度为4.86%的快速测量仪器。仪器测得的浮游植物初级生产力与液相氧电极法测得的光合放氧速率的相关系数为0.991。该仪器装备在中国海监101号实验船上,用于黄渤海浮游植物初级生产力在线测量和垂直剖面测量。测量结果表明,渤海湾内的浮游植物初级生产力是湾外的1.1~1.4倍,垂直剖面测量结果显示黄海区域各点位的浮游植物初级生产力的均与深度相关。与传统方法相比,所研制的仪器具有快速、稳定、无需样品培养等优点,可为海洋生态环境评价提供先进的技术方法。

关键词：浮游植物荧光动力学光合荧光参数初级生产力快速测量

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：