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2020 4th CAA International Conference on Vehicular Control and Intelligence (CVCI)最新文献

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Lidar-based Vehicle Target Recognition 基于激光雷达的车辆目标识别
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338499
Zhang Yang, Ge Pingshu, Xu Jingyi, Zhang Tao, Zhao Qian
Vehicle target recognition technology is an important technology in the auxiliary safe driving system, which greatly improves Vehicle safety assist driving. This paper proposes a method to identify vehicle target recognition with lidar point cloud data and machine learning; This method first establishes an ROI (region of interest), and uses voxel grid filter to downsample the lidar point cloud data in this area to reduce the amount of processed data, then use RANSAC (random sampling consensus) to remove ground points that are useless for the recognition process, and then use Euclidean clustering for clustering. A rough classifier is set to initially eliminate obstacles that cannot be vehicles, then the features of each cluster is extracted. SVM (Support Vector Machine) is used as an accurate classifier, the parameters of SVM is optimized through cross-validation and grid search to achieve the best classification effect. Finally, the optimized SVM is used to identify each cluster. Experiments show that this method can effectively detect the target vehicle in the ROI and has a good recognition accuracy.
车辆目标识别技术是辅助安全驾驶系统中的一项重要技术,极大地提高了车辆辅助驾驶的安全性。提出了一种结合激光雷达点云数据和机器学习的车辆目标识别方法;该方法首先建立感兴趣区域(ROI),使用体素网格滤波对该区域内的激光雷达点云数据进行下采样,减少处理数据量,然后使用RANSAC(随机采样共识)去除对识别过程无用的接地点,然后使用欧氏聚类进行聚类。设置一个粗糙分类器,首先排除非车辆的障碍物,然后提取每个聚类的特征。采用支持向量机(Support Vector Machine, SVM)作为精确分类器,通过交叉验证和网格搜索对SVM的参数进行优化,以达到最佳分类效果。最后,利用优化后的支持向量机对每个聚类进行识别。实验表明,该方法能有效地检测出ROI内的目标车辆,具有良好的识别精度。
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引用次数: 1
Decoupling Control Strategy for Cathode System of Proton Exchange Membrane Fuel Cell Engine 质子交换膜燃料电池发动机阴极系统的解耦控制策略
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338607
Huize Liu, Chuan Fang, Liangfei Xu, Zunyan Hu, Jianqiu Li, M. Ouyang, Yishu Zhang
Precise control of cathode pressure and flow rate is critical to the performance and durability of proton exchange membrane fuel cell systems. This study presents a model of the cathode subsystem of fuel cell engines, and the degree of air flow rate-pressure coupling in different working areas of air compressor is analyzed. A decoupling control algorithm based on the active disturbance rejection control is then designed to realize precise regulation of air pressure and flow rate. Finally, experiments are conducted on a domestic 80kW fuel cell engine, and the effectiveness of the control algorithm is validated. The experimental results indicate that the designed control algorithm has strong flow rate-pressure decoupling ability with fast response and high control accuracy.
精确控制阴极压力和流速对质子交换膜燃料电池系统的性能和耐久性至关重要。建立了燃料电池发动机阴极分系统的模型,分析了空压机不同工作区域空气流量-压力耦合的程度。设计了一种基于自抗扰控制的解耦控制算法,实现了气压和流量的精确调节。最后,在国产80kW燃料电池发动机上进行了实验,验证了控制算法的有效性。实验结果表明,所设计的控制算法具有较强的流量-压力解耦能力,响应速度快,控制精度高。
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引用次数: 0
A Game Theory-based Model Predictive Controller For Mandatory Lane Change Of Multiple Vehicles 基于博弈论的多车强制变道模型预测控制器
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338630
Shuang Pan, Yafei Wang, Kaizheng Wang
Lane change is receiving attention in academia. Most existing lane changing models are rule-based lane changing models which only assume one-direction impact of surrounding vehicles on the lane-changing vehicle. In fact, lane change is a process of mutual interaction between vehicles due to the complexity and uncertainty of the traffic environment. In this paper, we proposed a multi-vehicle cooperative control approach with a distributed control structure to control model. The innovation of this paper lies in that we proposed a multivehicle cooperative lane changing controller which combines game theory and model predictive control (MPC) based on vehicle to vehicle (V2V) communication; Moreover, we designed a multi-lane vehicle ordering method, and decided the optimal time and acceleration of lane change by considering the mutual interaction between vehicles. Typical scenarios were tested to verify that a lane changing vehicle could interact with other vehicles and change lanes without collision. We verified this approach of lane changing through CarSim and MATLAB cosimulation, and compared it with the conventional rule-based lane change decision controller. Test results show that the controller is capable of changing lanes in a smarter manner and guaranteeing the safety and efficiency of the autonomous vehicle.
车道变化正在受到学术界的关注。现有的变道模型大多是基于规则的变道模型,只假设周围车辆对变道车辆的单向影响。由于交通环境的复杂性和不确定性,变道实际上是车辆之间相互作用的过程。本文提出了一种基于分布式控制结构的多车协同控制方法。本文的创新点在于提出了一种基于车对车(V2V)通信,将博弈论与模型预测控制(MPC)相结合的多车协同变道控制器;设计了一种多车道车辆排序方法,考虑车辆之间的相互作用,确定最优变道时间和变道加速度。测试了典型场景,以验证变道车辆可以与其他车辆相互作用并在不发生碰撞的情况下变道。通过CarSim和MATLAB联合仿真对该变道方法进行了验证,并与传统的基于规则的变道决策控制器进行了比较。测试结果表明,该控制器能够以更智能的方式变道,保证自动驾驶车辆的安全性和效率。
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引用次数: 1
Predictive Compensation-Based Handling Stability Control Systems for Autonomous Vehicles under Transient Crosswind 基于预测补偿的瞬态侧风自动驾驶车辆操纵稳定性控制系统
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338642
Guo-Yong Huang, X. Yuan, Yaonan Wang
The strong transient crosswind has huge impact on the driving state of the autonomous vehicles, which requires the control system with good handling stability. Here, a predictive compensation-based handling stability control system (PCHSCS) is developed. The PCHSCS includes three parts: a steering controller, a speed controller, and a predictor. The steering controller is adopted to control the course for resisting the lateral acceleration caused by the crosswind. The speed controller is utilized to maintain the vehicle speed, decreasing the undesired longitudinal acceleration. The predictor is applied to predict the control error and the coupling interference. The predicted information, as compensation, is combined and fed to the speed controller and the steering controller. Simulation proves the PCHSCS can improve the vehicle handling stability under strong transient crosswind conditions.
强烈的瞬态侧风对自动驾驶汽车的行驶状态影响巨大,这就要求控制系统具有良好的操纵稳定性。本文提出了一种基于预测补偿的操纵稳定性控制系统。PCHSCS包括三个部分:一个转向控制器,一个速度控制器和一个预测器。采用转向控制器控制航向,以抵抗侧风引起的横向加速度。速度控制器用于保持车速,减少不期望的纵向加速度。利用预测器对控制误差和耦合干扰进行预测。预测的信息作为补偿,被组合并提供给速度控制器和转向控制器。仿真结果表明,PCHSCS可以提高车辆在强侧风条件下的操纵稳定性。
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引用次数: 0
A Review of Common Faults and Solution Strategies for Mine Explosion-Proof Mobile Substations 矿用防爆移动变电站常见故障及解决策略综述
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338648
Hao Feng, Haiwang Wang, Weidong Lu, Wenya Chen, Jingzhong Wen, Hua Chen
As more and more electrical equipment is used in coal mines, ensuring the normal operation of mine explosion-proof mobile substations has become a top priority for coal mine safety managemen. We must ensure the mine explosion-proof mobile substations run without hitches for extended periods of time, and all the electrical equipments work safely and reliably, which finally guarantee that various tasks of coal mine can be completed well. This paper introduces the structure and basic principles of mine explosion-proof mobile substations, and reviews the common faults and solutions for mine explosion-proof mobile substations.
随着煤矿使用的电气设备越来越多,保证矿井防爆移动变电站的正常运行已成为煤矿安全管理的重中之重。必须保证矿井防爆移动变电站长期无故障运行,保证所有电气设备安全可靠地工作,从而保证煤矿各项任务的顺利完成。介绍了矿用防爆移动变电站的结构和基本原理,综述了矿用防爆移动变电站常见故障及解决方法。
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引用次数: 0
A Passive Lifting Assist Exoskeleton with Multiple Working Modes: Theoretical Evaluation and Design Concepts 具有多种工作模式的被动提升辅助外骨骼:理论评估和设计概念
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338652
Size Zheng, Beizhe Yuan, J. Ferreira, Tao Liu, Tong Li, Long He, Xinrui Wang
A belt-type passive exoskeleton equipped with multiple working modes has been designed to support the back muscles during manual lifting tasks. Our concept is to develop a wearable assistive device that can provide motion-based assistance like the existing passive devices in the down phase of lifting, but in the up phase, can supply more load-based power. To achieve this goal, we designed two purely mechanical control mechanisms that can preload the load-based assist force and release it when the wearer intends to erect the trunk. This paper presents mathematical proof using a linked segment model and moment balance equations in the sagittal plane. Simulation proof is also provided based on a simple musculoskeletal model which executed sagittal plane lifting with a 20kg load in hands in stoop posture under three different conditions (no assist, classic mode, enhanced mode). The subsequent results suggest that the device substantially reduces the muscle force and lumbar moment by 27.7-43.5%, and in the enhanced mode, the efficacy is better than the classic mode. No such a quasi-passive back-support exoskeleton was found at the time of writing. This design concept is promising to help reduce the risk of back injuries in heavy load lifting and works that need workers to keep a forward bending and static holding postures such as vehicle assembly.
一种配备多种工作模式的带式被动外骨骼设计用于在手动提升任务时支持背部肌肉。我们的概念是开发一种可穿戴辅助设备,它可以像现有的被动设备一样,在升降的下阶段提供基于运动的辅助,但在上阶段,可以提供更多基于负载的动力。为了实现这一目标,我们设计了两个纯机械控制机构,可以预加载基于负载的辅助力,并在穿戴者打算直立躯干时释放它。本文给出了用连接段模型和矢状面力矩平衡方程的数学证明。基于简单的肌肉骨骼模型,在三种不同的条件下(无辅助、经典模式、增强模式),以俯身姿势进行手持20kg负载的矢状面提升,并提供了仿真证明。后续结果表明,该装置可大幅降低肌力和腰力矩27.7-43.5%,且在增强模式下,效果优于经典模式。在撰写本文时,没有发现这种准被动背部支撑外骨骼。这一设计理念有望帮助降低重负荷起吊和需要工人保持前屈和静态保持姿势的工作(如车辆组装)中背部受伤的风险。
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引用次数: 2
Command-filtered Backstepping Control for Single-phase NPC Rectifier 单相NPC整流器的命令滤波反步控制
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338546
Chen Zhang, Bin Duan, Cheng Fu, Jinqiu Song, C. Zhang
Single-phase neutral point clamped rectifier (SP-NPCR) is getting much interest in 10 kV electric vehicle (EV) charging DC systems due to its low voltage stress on power switches. In order to achieve good tracking performance and anti-disturbance ability, a robust command-filtered backstepping control strategy of the SP-NPCR is proposed in this paper. Firstly, based on the SP-NPCR model in dq frame, the command-filtered backstepping controller is constructed, which compose of the output voltage controller and the reactive current controller. The command filter is used to meet the requirement of analytic differentiation of the virtual controller and simplify the controller structure. Then, the global stabilization of the SP-NPCR is conducted and proved by the Lyapunov stability theory. The simulation for SP-NPCR has been carried out to demonstrate that the proposed system has better dynamic property and robustness compared with the conventional proportional- Integral method.
单相中性点箝位整流器(SP-NPCR)由于其对电源开关的低压应力,在10kv电动汽车(EV)充电直流系统中越来越受到关注。为了获得良好的跟踪性能和抗干扰能力,本文提出了一种鲁棒命令滤波SP-NPCR反步控制策略。首先,基于dq框架下的SP-NPCR模型,构造了由输出电压控制器和无功电流控制器组成的命令滤波反步控制器;命令滤波器用于满足虚拟控制器解析微分的要求,简化控制器结构。然后,利用Lyapunov稳定性理论证明了SP-NPCR的全局镇定性。对SP-NPCR进行了仿真,结果表明,与传统的比例积分方法相比,该方法具有更好的动态性能和鲁棒性。
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引用次数: 3
Trajectory Tracking Control for Connected Vehicle Platoon under the Curved Road 弯曲道路下联网车辆队列轨迹跟踪控制
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338577
Songyuan Hua, Yongfu Li, Shuyou Yu
This study addresses the conundrum of the trajectory tracking control for a connected vehicle (CV) platoon on the straight road and curved road. To be specific, the communication topology of bidirectional leader-follower is used to describe the vehicles' communication connection in the vehicle- vehicle/vehicle- to-infrastructure (V2X) environment. Then, a nonlinear state feedback control algorithm for follower vehicles is put forward through merging the phenomenon of car-following interactions, the spacing error, velocity difference and angular difference in relation to the leader vehicle. The proposed algorithm's stability is verified by means of Lyapunov technique. And then, simulation experiments under two scenarios: the leader vehicle runs on the straight road and curved road, respectively, and the followers run after the leader vehicle. The numerical simulation results prove the effectiveness of the proposed control algorithm.
本文研究了网联车辆在直线道路和弯曲道路上的轨迹跟踪控制问题。具体而言,采用双向leader-follower通信拓扑来描述车辆-车辆/车辆-基础设施(V2X)环境下的车辆通信连接。在此基础上,提出了一种非线性的跟随车辆状态反馈控制算法,该算法综合考虑了跟随车辆相互作用现象、与前导车辆的间距误差、速度差和角差。通过李亚普诺夫技术验证了该算法的稳定性。然后,分别在领队车辆在直道和弯道上行驶,跟随车辆在领队车辆后行驶两种情况下进行仿真实验。数值仿真结果证明了所提控制算法的有效性。
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引用次数: 0
A novel envelope stability control scheme based on phase plane with enhanced overshoot dynamics of vehicle 一种基于相位平面的增强车辆超调动力学的包络稳定性控制新方案
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338474
Xiaoyu Li, N. Xu, Jiameng Xu
Phase plane is a visualized method to analyze the vehicle lateral behavior. The envelope control based on the sideslip angle and yaw rate phase plane can effectively restrict the vehicle states in the safe operation region for ensuring the stability of the vehicle. However, In most of such control schemes, many stable regions are not included in the envelope such that the dynamic performance of the vehicle is largely constrained. To solve this problem, this paper proposes a novel envelope control scheme based on saddle nodes position. It improves the overshoot dynamics by incorporating more stable regions in yaw rate direction and thus, improving the dynamic performance and steering agility. The simulation results indicate that compared to the previous envelope schemes, the proposed one can effectively improve the dynamic performance of the vehicle under the condition of ensuring stability.
相平面是一种可视化的分析车辆横向特性的方法。基于侧滑角和横摆角速度相平面的包络控制可以有效地将车辆状态限制在安全运行区域内,保证车辆的稳定性。然而,在大多数此类控制方案中,许多稳定区域不包括在包络中,从而在很大程度上约束了车辆的动态性能。为了解决这一问题,本文提出了一种基于鞍节点位置的包络控制方案。它通过在偏航率方向上加入更稳定的区域来改善超调动力学,从而提高动态性能和转向敏捷性。仿真结果表明,与以往的包络方案相比,所提出的包络方案能够在保证稳定性的前提下有效地改善车辆的动态性能。
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引用次数: 0
Model predictive control-based path tracking control for automatic guided vehicles 基于模型预测控制的自动制导车辆路径跟踪控制
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338578
Haitian Xu, Zhixin Yu, Xiaohui Lu, Shuai Wang, Shaosong Li, Shujun Wang
In this study, a path tracking control method based on model predictive control (MPC) is presented to improve the results of path tracking. A simulation model of an automatic guided vehicle (AGV) is employed in a robot operating system (ROS). A collision free path is established with the ROS under the scene of continuous turning as a reference path. A linear MPC controller is used to control the AGV in the ROS, and a simulation experiment is performed with the combined simulation of ROS and MATLAB. Experimental results verify that the proposed MPC controller has a good tracking performance under complex road conditions.
本文提出了一种基于模型预测控制(MPC)的路径跟踪控制方法,以改善路径跟踪的效果。将自动导引车(AGV)的仿真模型应用于机器人操作系统(ROS)。以连续转弯场景下的ROS为参考路径,建立了无碰撞路径。采用线性MPC控制器对AGV在ROS中的控制,并结合ROS和MATLAB进行了仿真实验。实验结果验证了所提出的MPC控制器在复杂路况下具有良好的跟踪性能。
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引用次数: 5
期刊
2020 4th CAA International Conference on Vehicular Control and Intelligence (CVCI)
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