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2022 IEEE Intelligent Vehicles Symposium (IV)最新文献

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Beyond 10Gbps Electrical Automotive Ethernet Channel Insertion Loss Characterization 超过10Gbps的汽车电子以太网通道插入损耗特性
Pub Date : 2022-06-05 DOI: 10.1109/iv51971.2022.9827213
Jamila Josip Borda, K. Matheus, F. Gerfers
This research work focuses on electrical investigations and characterization of the Automotive Ethernet channel for 25Gbps (25GBASE-T1). This characterization is performed with the aid of insertion loss ($mathrm{S}_{mathrm{DD}12}/mathrm{S}_{mathrm{DD}21}$) mixed-mode scattering parameters (S-parameters) which describe the transmitted signal electrical behavior within the Ethernet channel considering it’s coupled transmission line characteristics. This paper commences with an introductory background of this research topic. This is then followed with an overview of the Automotive Ethernet channel and components. A succeeding section addresses the various channel electrical characteristic parameters. With the aid of implemented multi-gigabit Ethernet test boards, to emulate an ECU-ECU communication system setup, the fourth section investigates and discusses insertion loss test bench measurements and simulations on channel segments (PCB, link segment) and complete single 25Gbps (25GBASE-T1) Ethernet channel. The investigations in this study deploy Shielded Twisted Pair (STP) cables of varying length and cable topologies as a physical transmission medium. Last section addresses the key takeaways of this paper and recommendations on subsequent analysis.
这项研究工作的重点是25Gbps (25GBASE-T1)汽车以太网通道的电气调查和表征。该表征是借助插入损耗($mathrm{S}_{mathrm{DD}12}/mathrm{S}_{mathrm{DD}21}$)混合模式散射参数(S参数)进行的,该参数描述了考虑到耦合传输线特性的以太网信道内传输信号的电气行为。本文首先介绍了本研究课题的背景。接下来是对汽车以太网通道和组件的概述。下一节讨论各种通道电气特性参数。在实现的多千兆以太网测试板的帮助下,为了模拟ECU-ECU通信系统的设置,第四部分研究和讨论了在信道段(PCB,链路段)和完整的单个25Gbps (25GBASE-T1)以太网信道上的插入损耗试验台测量和仿真。本研究的调查部署了不同长度和电缆拓扑的屏蔽双绞线(STP)电缆作为物理传输介质。最后一节阐述了本文的主要结论和对后续分析的建议。
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引用次数: 0
On Uncertainty Quantification for Convolutional Neural Network LiDAR Localization 卷积神经网络激光雷达定位的不确定性量化研究
Pub Date : 2022-06-05 DOI: 10.1109/iv51971.2022.9827445
M. Joerger, Julian Wang, A. Hassani
In this paper, we develop and evaluate a Convolutional Neural Network (CNN)-based Light Detection and Ranging (LiDAR) localization algorithm that includes uncertainty quantification for ground vehicle navigation. This paper builds upon prior research where we used a CNN to estimate a rover’s position and orientation (pose) using LiDAR point clouds (PCs). This paper presents a simplification of the LiDAR PC processing and describes a new approach for outputting a covariance matrix in addition to the rover pose estimates. Performance assessment is carried out in a structured, static lab environment using a LiDAR-equipped rover moving along a fixed, repeated trajectory.
在本文中,我们开发并评估了一种基于卷积神经网络(CNN)的光探测和测距(LiDAR)定位算法,该算法包括用于地面车辆导航的不确定性量化。本文建立在之前的研究基础上,我们使用CNN利用激光雷达点云(pc)来估计漫游者的位置和方向(姿势)。本文提出了一种激光雷达PC处理的简化方法,并描述了一种新的输出协方差矩阵的方法。性能评估是在一个结构化的静态实验室环境中进行的,使用配备激光雷达的漫游者沿着固定的、重复的轨迹移动。
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引用次数: 0
Unsupervised Anomaly Detection Approach for Shift Quality Assessment Using Deep Neural Networks 基于深度神经网络的无监督异常检测方法
Pub Date : 2022-06-05 DOI: 10.1109/iv51971.2022.9827200
Geesung Oh, Joon-Sang Park, Kyunghun Hwang, Sejoon Lim
It is necessary to calibrate the hydraulic pressure of the shift control to develop an automatic transmission (AT), and this calibration process entails a subjective shift quality assessment by experienced engineers. An objective shift quality assessment methodology has been explored for a long time to replace the engineer. The most recent data-based assessment model has attained a nearly human-like performance. However, preparing the large number of data labels required for supervised learning of the model has limitations. This study proposes an unsupervised anomaly detection model for objective shift quality assessment to address data label shortages and high data labeling costs. The proposed anomaly detection model is trained to classify a normal shift and an abnormal shift using just normal shift data. It is possible to easily obtain many train datasets from ordinary vehicles, and data labeling is not required. On the basis of real vehicle shift data, multiple anomaly detection models composed of various deep neural networks are developed and assessed. The evaluation results show that training exclusively on normal shift data can detect abnormal shifts; the best area under receiver operating characteristic curve is 0.902.
为了开发自动变速器(AT),必须对换挡控制的液压进行校准,而这一校准过程需要经验丰富的工程师对换挡质量进行主观评估。长期以来,人们一直在探索一种客观的转移质量评价方法来取代工程师。最新的基于数据的评估模型已经达到了接近人类的表现。然而,为模型的监督学习准备大量数据标签是有局限性的。本研究提出一种无监督异常检测模型,用于客观班次质量评估,以解决数据标签短缺和高数据标签成本的问题。所提出的异常检测模型被训练成仅使用正常移位数据对正常移位和异常移位进行分类。可以很容易地从普通车辆获得许多列车数据集,并且不需要数据标记。在实际车辆换挡数据的基础上,开发并评估了由多种深度神经网络组成的多种异常检测模型。评估结果表明,仅对正常班次数据进行训练可以检测出异常班次;接收机工作特性曲线下的最佳面积为0.902。
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引用次数: 0
MEAT: Maneuver Extraction from Agent Trajectories 从Agent轨迹中提取机动
Pub Date : 2022-06-05 DOI: 10.48550/arXiv.2206.05158
Julian Schmidt, Julian Jordan, D. Raba, Tobias Welz, K. Dietmayer
Advances in learning-based trajectory prediction are enabled by large-scale datasets. However, in-depth analysis of such datasets is limited. Moreover, the evaluation of prediction models is limited to metrics averaged over all samples in the dataset. We propose an automated methodology that allows to extract maneuvers (e.g., left turn, lane change) from agent trajectories in such datasets. The methodology considers information about the agent dynamics and information about the lane segments the agent traveled along. Although it is possible to use the resulting maneuvers for training classification networks, we exemplary use them for extensive trajectory dataset analysis and maneuver-specific evaluation of multiple state-of-the-art trajectory prediction models. Additionally, an analysis of the datasets and an evaluation of the prediction models based on the agent dynamics is provided.
基于学习的轨迹预测的进步是由大规模数据集实现的。然而,对这些数据集的深入分析是有限的。此外,预测模型的评估仅限于数据集中所有样本的平均指标。我们提出了一种自动化的方法,允许从这些数据集中的智能体轨迹中提取机动(例如,左转,变道)。该方法考虑了智能体动态信息和智能体行驶的车道段信息。虽然可以将结果机动用于训练分类网络,但我们示例地将它们用于广泛的轨迹数据集分析和多个最先进的轨迹预测模型的机动特定评估。此外,还对数据集进行了分析,并对基于智能体动力学的预测模型进行了评价。
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引用次数: 2
Generation of Coupling Topologies for Multi-Agent Systems using Non-Cooperative Games 基于非合作博弈的多智能体系统耦合拓扑生成
Pub Date : 2022-06-05 DOI: 10.1109/iv51971.2022.9827431
M. Kloock, Matthis Dirksen, S. Kowalewski, Bassam Alrifaee
This paper presents a method for generating coupling topologies for multi-agent systems. Our method is based on a non-cooperative game in which each agent chooses couplings to activate or deactivate using a utility function. The utility function measures the importance of agents to one another and enables conflict avoidance in distributed decision-making. Depending on the application’s needs, our method is able to generate unidirectional or bidirectional couplings. In our evaluation, we used car-like robots in a simulation environment. It shows that the generated coupling topologies are applicable to the domain of networked and autonomous vehicles.
提出了一种多智能体系统耦合拓扑的生成方法。我们的方法是基于一个非合作博弈,其中每个代理使用效用函数选择激活或停用耦合。效用函数用来度量agent对彼此的重要性,从而避免分布式决策中的冲突。根据应用程序的需要,我们的方法能够生成单向或双向耦合。在我们的评估中,我们在模拟环境中使用了类似汽车的机器人。结果表明,所生成的耦合拓扑结构适用于联网和自动驾驶汽车领域。
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引用次数: 1
Rule-Compliant Trajectory Repairing using Satisfiability Modulo Theories 基于可满足模理论的符合规则轨迹修复
Pub Date : 2022-06-05 DOI: 10.1109/iv51971.2022.9827357
Yuan-Chuen Lin, M. Althoff
Autonomous vehicles must comply with traffic rules. However, most motion planners do not explicitly consider all relevant traffic rules. Once traffic rule violations of an initially-planned trajectory are detected, there is often not enough time to replan the entire trajectory. To solve this problem, we propose to repair the initial trajectory by investigating the satisfiability modulo theories paradigm. This framework makes it efficient to reason whether and how the trajectory can be repaired and, at the same time, determine the part along the trajectory that can remain unchanged. Moreover, the robustness of traffic rule satisfaction is used to formulate a convex optimization problem for generating rule-compliant trajectories. We compare our approach with trajectory replanning and demonstrate its usefulness with traffic scenarios from the CommonRoad benchmark suite and recorded data. The evaluation result shows that rule-compliant trajectory repairing is computationally efficient and widely applicable.
自动驾驶汽车必须遵守交通规则。然而,大多数运动规划者并没有明确考虑所有相关的交通规则。一旦检测到违反交通规则的初始规划轨迹,通常没有足够的时间来重新规划整个轨迹。为了解决这个问题,我们建议通过研究可满足模理论范式来修复初始轨迹。该框架可以有效地推断轨迹是否可以修复以及如何修复,同时确定轨迹沿线可以保持不变的部分。此外,利用交通规则满足的鲁棒性,构造了一个凸优化问题来生成符合规则的轨迹。我们将我们的方法与轨迹重新规划进行了比较,并展示了其在CommonRoad基准套件和记录数据的交通场景中的实用性。评价结果表明,该方法计算效率高,适用范围广。
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引用次数: 8
Learning-based Eco-driving Strategy Design for Connected Power-split Hybrid Electric Vehicles at signalized corridors 基于学习的混合动力互联汽车信号通道生态驾驶策略设计
Pub Date : 2022-06-05 DOI: 10.1109/iv51971.2022.9827278
Zhihan Li, Weichao Zhuang, Guo-dong Yin, Fei Ju, Qun Wang, Haonan Ding
The eco-driving strategy that targets driving speed optimization is recognized as a promising technique to improve vehicle energy efficiency. However, it is difficult to achieve real-time eco-driving control of hybrid electric vehicle (HEV) since the speed optimization and powertrain energy management should be resolved simultaneously. This paper proposes a hierarchical control architecture consisting of learning-based velocity planner and real-time energy management system. In the upper stage, Proximal Policy optimization (PPO) agent is trained to generate acceleration which meets multiple control objectives. The lower stage adopts Equivalent Consumption Minimization Strategy (ECMS) for real-time power split control considering powertrain dynamics. Finally, the eco-driving simulations of six signalized intersections in Nanjing are conducted. Compared with two different rule-based strategies, the proposed control architecture can achieve at least 7.39% of fuel economy saving and avoid a significant drop in the battery state of charge at the expense of higher than 5% of travel time. Simulation results also prove that the proposed strategy has an energy-saving potential in unseen scenarios.
以行驶速度优化为目标的生态驾驶策略被认为是一种很有前途的提高汽车能效的技术。然而,混合动力汽车的速度优化和动力系统能量管理需要同时解决,难以实现实时的生态驾驶控制。提出了一种由基于学习的速度规划器和实时能量管理系统组成的分层控制体系结构。在上部阶段,训练近端策略优化(PPO)智能体生成满足多个控制目标的加速度。下级采用等效消耗最小化策略(ECMS)进行实时功率分配控制,同时考虑动力总成动力学特性。最后,对南京市6个信号交叉口进行了生态驾驶仿真。与两种不同的基于规则的控制策略相比,所提出的控制架构可以实现至少7.39%的燃油经济性节约,并且以高于5%的行驶时间为代价避免电池电量状态的显著下降。仿真结果也证明了该策略在未知场景下具有节能潜力。
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引用次数: 1
Quantifying Realistic Behaviour of Traffic Agents in Urban Driving Simulation Based on Questionnaires 基于问卷的城市驾驶模拟中交通主体现实行为量化研究
Pub Date : 2022-06-05 DOI: 10.1109/iv51971.2022.9827165
Teresa Rock, M. Bahram, Chantal Himmels, S. Marker
Driving simulation is becoming an increasingly important component of research and development in the automotive industry. When performing simulator studies in urban scenarios, the challenge is to create a realistic driving context including natural interactions between the subject and artificial traffic participants, which are simulated by agent models. These traffic agents should behave as similar as possible to real humans. This raises the question of how to define realistic or human-like behaviour of traffic agents and how to measure this. Furthermore, it is necessary to investigate the influence of the surrounding traffic on the driver’s behaviour and perception of reality in the simulator. Accordingly, we present a method for quantifying the degree of realism of virtual traffic agents’ behaviour and their impact on subjects’ experience in a simulator experiment. By means of questionnaires, participants rated their perception of reality and the behaviour of present agent models. The experiment shows that surrounding traffic has a positive effect on subjects’ perception and behaviour, indicating that more realistic traffic agents have the potential to improve the validity of simulator studies. Moreover, our results provide new insights regarding required characteristics for the development of human-like traffic agents and give an overview of current strengths and weaknesses.
驾驶仿真正在成为汽车工业研究和开发中越来越重要的组成部分。当在城市场景中进行模拟器研究时,挑战在于创建一个真实的驾驶环境,包括主体和人工交通参与者之间的自然交互,这是由智能体模型模拟的。这些交通代理的行为应该尽可能地接近真实的人类。这就提出了一个问题,即如何定义交通代理人的现实行为或类似人类的行为,以及如何衡量这种行为。此外,有必要在模拟器中研究周围交通对驾驶员行为和真实感感知的影响。因此,我们在模拟器实验中提出了一种量化虚拟交通代理行为的真实性程度及其对受试者体验的影响的方法。通过问卷调查的方式,参与者评价他们对现实的感知和目前代理模型的行为。实验表明,周围交通对被试的感知和行为有积极的影响,表明更真实的交通代理有可能提高模拟器研究的有效性。此外,我们的研究结果为开发类人交通代理所需的特性提供了新的见解,并概述了当前的优势和劣势。
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引用次数: 1
3DOP: Comfort-oriented Motion Planning for Automated Vehicles with Active Suspensions 3DOP:主动悬架自动驾驶汽车的舒适运动规划
Pub Date : 2022-06-05 DOI: 10.1109/iv51971.2022.9827152
Yanggu Zheng, Barys Shyrokau, T. Keviczky
Motion comfort is the basis of many societal benefits promised by automated driving and motion planning is primarily responsible for this. By planning the spatial trajectory and the velocity profile, motion planners can significantly enhance motion comfort, ideally without sacrificing time efficiency. Active suspensions can push the boundary further by enabling additional degrees of freedom in the controllable vehicle motions. In this paper, we propose to integrate the planning of roll motion into an optimization-based motion planning algorithm called 3DOP(3 Degrees-of-Freedom Optimal Planning), where the conflicting objectives of comfort and time efficiency are optimized. The feasibility of the planned motion is verified in a realistic simulation environment, where feedforward-proportional control suffices to track the speed, path, and roll references. The proposed scheme achieves a significant reduction of motion discomfort, namely by up to 28.1% over the variant without controllable roll motion, or up to 34.2% over an acceleration-bounded driver model. The results suggest considerable potential for improving motion comfort by equipping automated vehicles with active suspensions.
运动舒适是自动驾驶承诺的许多社会效益的基础,而运动规划是主要原因。通过规划空间轨迹和速度轮廓,运动规划者可以显著提高运动舒适性,理想情况下不牺牲时间效率。主动悬架可以通过在可控制的车辆运动中提供额外的自由度来进一步推动边界。在本文中,我们提出将滚动运动的规划整合到一个基于优化的运动规划算法中,称为3DOP(3自由度最优规划),其中优化了舒适性和时间效率的冲突目标。在现实的仿真环境中验证了计划运动的可行性,其中前馈比例控制足以跟踪速度,路径和滚动参考。所提出的方案显著降低了运动不适感,即比无可控侧滚运动的版本减少了28.1%,比有加速度限制的驾驶员模型减少了34.2%。研究结果表明,为自动驾驶汽车配备主动悬架,在改善运动舒适性方面具有相当大的潜力。
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引用次数: 8
Robust Online Path Planning for Autonomous Vehicle Using Sequential Quadratic Programming 基于顺序二次规划的自动驾驶汽车鲁棒在线路径规划
Pub Date : 2022-06-05 DOI: 10.1109/iv51971.2022.9827017
Yuncheng Jiang, Zenghui Liu, Danjian Qian, Hao Zuo, Weiliang He, Jun Wang
In urban driving scenarios, it is a key component for autonomous vehicles to generate a smooth, kinodynamically feasible, and collision-free path. We present an optimization-based path planning method for autonomous vehicles navigating in cluttered environment, e.g., roads partially blocked by static or moving obstacles. Our method first computes a collision-free reference line using quadratic programming(QP), and then using the reference line as initial guess to generate a smooth and feasible path by iterative optimization using sequential quadratic programming(SQP). It works within a fractions of a second, thus permitting efficient regeneration.
在城市驾驶场景中,自动驾驶汽车的关键组成部分是生成平滑、运动动力学可行、无碰撞的路径。我们提出了一种基于优化的路径规划方法,用于自动驾驶汽车在混乱环境中导航,例如被静态或移动障碍物部分阻塞的道路。该方法首先使用二次规划(QP)计算一条无碰撞参考线,然后使用顺序二次规划(SQP)将参考线作为初始猜测,通过迭代优化生成光滑可行的路径。它在几分之一秒内工作,因此允许有效的再生。
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引用次数: 1
期刊
2022 IEEE Intelligent Vehicles Symposium (IV)
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