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The Roll Stability Analysis of Semi-Trailer Based on the Wheel Force

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Computers, Materials & Continua 2022年第4期71卷 1837-1848页

作者： Dong Wang Siwei Chen weigong zhang Danjie Du Collage of Instrumental Science and Engineering Southeast UniversityNanjing210096China North Carolina State University Raleigh27695USA

It is different for the liquid tank semi-trailer to keep roll stability during turning or emergency voidance,and that may cause serious *** the scholars did lots of research about the roll stability of liquid tank semi-trailer in theory by calculating and simulation,how to make an effective early warning of rollover is still unsolved in *** reasons include the complex driving condition and the difficulty of the vehicle parameter *** feasible method used currently is evaluating the roll stability of a liquid tank semi-trailer by the lateral acceleration or the attitude of the ***,the lateral acceleration is more useful for sideslip rather than rollover,and the attitude is a kind of posterior way,which means it is hard to take measures to cope with the rollover accident when the attitude exceeds the safety *** the movement of the vehicle is totally caused by the wheel force,the rollover could also be predicted by the changing of the wheel ***,in this paper,we developed a method to analyze the roll stability by the vertical wheel force.A thorough experiment environment is established,and the effectiveness of the proposed method is verified in real driving conditions.

关键词： Roll stability wheel force liquid tank semi-trailer real driving conditions

Forecasting Future Trajectories with an Improved Transformer Network

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Computers, Materials & Continua 2023年第2期74卷 3811-3828页

作者： Wei Wu weigong zhang Dong Wang Lydia Zhu Xiang Song School of Instrument Science and Engineering Southeast UniversityNanjing210000China Department of Mechanical Aerospace&Engineering North Carolina State UniversityRaleigh27695NCUSA School of Electronic Engineering Nanjing Xiaozhuang UniversityNanjing211171China

An increase in car ownership brings convenience to people’s ***,it also leads to frequent traffic *** forecasting surrounding agents’future trajectories could effectively decrease vehicle-vehicle and vehicle-pedestrian ***-short-term memory(LSTM)network is often used for vehicle trajectory prediction,but it has some shortages such as gradient explosion and low efficiency.A trajectory prediction method based on an improved Transformer network is proposed to forecast agents’future trajectories in a complex traffic *** realizes the transformation from sequential step processing of LSTM to parallel processing of Transformer based on *** performtrajectory predictionmore efficiently,a probabilistic sparse self-attention mechanism is introduced to reduce attention complexity by reducing the number of queried values in the attention *** or not(ACON)activation function is adopted to select whether to activate or not,hence improving model *** proposed method is evaluated on the publicly available benchmarks nextgeneration simulation(NGSIM)and ETH/*** experimental results indicate that the proposed method can accurately and efficiently predict agents’trajectories.

关键词： Trajectory prediction Transformer attention mechanism ACON activation intelligent perception

Experimental study of fatigue degree quantification for multi-feature fusion identification

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High Technology Letters 2014年第2期20卷 146-153页

作者：孙伟 Zhu Jiandong zhang Xiaorui He Jun zhang weigong School of Information and Control Nanjing University of Information Science & Technology School of Electronic and Information Engineering Nanjing University of Information Science & Technology School of Instrument Science and Engineering Southeast University

A comprehensive quantification method of fatigue degree is proposed concerning subjective and objective *** the fatigue degree test software,fatigue degree is objectively quantified by analyzing the reaction and operation abilities of drivers about traffic *** comparison experiment with that EEG signal based,multivariate statistical analysis and fusion identification based on BP neural network(BPNN) results show that the experimental procedure is simple and practical,and the proposed method can reveal the correlation between fatigue feature parameters and fatigue degree in theory,and also can achieve accurate and reliable quantification of fatigue degree,especially under the associated action of multiple fatigue feature parameters.

关键词： fatigue driving fatigue degree quantification fusion identification experimental study

A Smart Wearable Ring Device for Sensing Hand Tremor of Parkinson’s Patients

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Computer Modeling in Engineering & Sciences 2021年第3期126卷 1217-1238页

作者： Haixia Yang Yixian Shen Wei Zhuang Chunming Gao Dong Dai weigong zhang School of Instrument Science and Engineering Southeast UniversityNanjing210096China School of Computer and Software Nanjing University of Information Science and TechnologyNanjing210044China School of Engineering and Technology University of WashingtonTacoma98402USA School of Cyber Science and Engineering Southeast UniversityNanjing210096China

Parkinson’s disease(PD)is a very common neurodegenerative disease that occurs mostly in the *** are many main clinical manifestations of PD,such as tremor,bradykinesia,muscle rigidity,*** on the current research on PD,the accurate and convenient detection of early symptoms is the key to detect *** the development of microelectronic and sensor technology,it is much easier to measure the barely noticeable tremor in just one hand for the early detection of Parkinson’s *** this paper,we present a smart wearable device for detecting hand tremor,in which MPU6050(MIDI Processing Unit)consisting of a 3-axis gyroscope and a 3-axis accelerometer is used to collect acceleration and angular velocity of *** analyzing the time of specific finger movements,we successfully recognized the tremor signals with high ***,with Bluetooth 4.0(Bluetooth Low Energy,BLE)and networking terminal ability,tremor data can be transferred to a monitoring device in real time with extremely lowenergy *** experimental results have shown that the proposed device(smart ring)is convenient for long-term tremor detection which is vital for early detection and treatment for Parkinson’s disease.

关键词： Parkinson’s disease tremor detection IMU sensor MPU6050 BLE

Chinese Women's College

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Women of China 1997年第1期 27-29页

作者： zhang PING ZHENG weigong

Chinese Women’s College is located in Yuhuidong Road, in northeast Beijing. The name of the college was written by Jiang Zemin, President of the People’s Republic of China in August 1995 to honor the school.

关键词： honor college northeast Republic ceremony attend concentrate Standing

基于模糊自适应PID的汽车驾驶机器人的车速控制

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汽车工程 2012年第6期34卷 511-516页

作者：陈刚张为公南京理工大学机械工程学院南京210094 东南大学仪器科学与工程学院南京210096

针对汽车驾驶机器人采用常规PID控制时车速波动大、调节器参数调整困难等问题,提出了一种基于模糊自适应PID的汽车驾驶机器人车速控制方法。首先建立了汽车驾驶机器人多机械手协调控制模型,然后在此基础上设计了一种驾驶机器人模糊自适... 详细信息

针对汽车驾驶机器人采用常规PID控制时车速波动大、调节器参数调整困难等问题,提出了一种基于模糊自适应PID的汽车驾驶机器人车速控制方法。首先建立了汽车驾驶机器人多机械手协调控制模型,然后在此基础上设计了一种驾驶机器人模糊自适应PID车速控制器,实现了驾驶机器人对给定循环行驶工况的车速跟踪。试验结果表明,与常规PID控制方法相比,采用所提出的方法车速跟踪精度明显改善,车速跟踪误差在±2km/h范围内,满足国家汽车试验标准的要求,保证汽车试验数据准确有效。

关键词：汽车试验驾驶机器人车速控制自适应模糊PID控制

基于联邦滤波的智能车辆多传感器组合导航的研究

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中国机械工程 2008年第12期19卷 1446-1451页

作者：李旭张为公东南大学南京210096

为满足复杂环境下自主驾驶智能车辆的高可靠性导航要求,对智能车辆的多传感器组合导航进行了研究。提出了一种基于自适应联邦卡尔曼滤波的智能车辆SINS/CP-DGPS/双向光电测速仪组合导航方法,根据联邦滤波的分散滤波结构,分别建立了各滤... 详细信息

为满足复杂环境下自主驾驶智能车辆的高可靠性导航要求,对智能车辆的多传感器组合导航进行了研究。提出了一种基于自适应联邦卡尔曼滤波的智能车辆SINS/CP-DGPS/双向光电测速仪组合导航方法,根据联邦滤波的分散滤波结构,分别建立了各滤波器的模型,进行了仿真试验验证。结果表明,该组合导航系统能为智能车辆提供丰富的导航信息,具有100Hz的高频输出、厘米级的导航精度和较强的容错能力,便于实现对发生故障的传感器的隔离。当GPS较长时间中断时,组合系统通过SINS/光电测速仪所构成的局部滤波器的辅助仍能为智能车辆提供可靠的导航数据。

关键词：智能车辆自主驾驶组合导航信息融合

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基于视觉的车道偏离报警系统的研究

仪器仪表学报 2008年第7期29卷 1554-1558页

作者：李旭张为公东南大学仪器科学与工程学院南京210096

本文对基于视觉的车道偏离报警系统进行了研究。为适应车载环境的要求,设计开发了基于PC104的嵌入式车道偏离报警系统,介绍了系统构成及其工作流程。通过适当的预处理和有效的车道线边缘点筛选算法,实现了对车道线的快速准确提取。最后... 详细信息

本文对基于视觉的车道偏离报警系统进行了研究。为适应车载环境的要求,设计开发了基于PC104的嵌入式车道偏离报警系统,介绍了系统构成及其工作流程。通过适当的预处理和有效的车道线边缘点筛选算法,实现了对车道线的快速准确提取。最后研究了无需对摄像机进行标定的车道偏离报警决策问题。实验表明,本文开发的车道偏离报警系统具有25ms帧/的实时图像处理速度和良好的识别可靠性与报警决策能力,能够满足高速公路环境车道偏离报警要求。

关键词：车道偏离报警主动安全视觉决策

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基于摄像机模型的运动车辆车道偏离检测

东南大学学报（自然科学版） 2009年第5期39卷 933-936页

作者：余厚云张为公东南大学仪器科学与工程学院南京210096 南京航空航天大学机电学院南京210016

针对车道偏离检测中较难解决的车载摄像机标定问题,从分析摄像机成像模型入手,根据图像中3条或3条以上车道线的消失点位置以及车道线斜率关系,在道路现场调整摄像机安装位置,以实现对摄像机外部参数的直接设定,从而避开了繁琐的摄像机... 详细信息

针对车道偏离检测中较难解决的车载摄像机标定问题,从分析摄像机成像模型入手,根据图像中3条或3条以上车道线的消失点位置以及车道线斜率关系,在道路现场调整摄像机安装位置,以实现对摄像机外部参数的直接设定,从而避开了繁琐的摄像机参数标定过程.同时,推导出图像内车道线斜率比与车道偏离程度的简单函数关系,该函数与摄像机内外参数无关.因此,行车过程中只需测量图像中车道线的斜率,即可计算出车辆当前的车道偏离量.现场试验结果表明,在车辆直行时采用该方法测得的车道偏离率与手工实测结果相比,其相对误差小于5%,具备了较高的检测精度.

关键词：机器视觉车道偏离摄像机模型车道线