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2015 IEEE Intelligent Vehicles Symposium (IV)最新文献

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Optimal parameter selection of a Model Predictive Control algorithm for energy efficient driving of heavy duty vehicles 重型车辆节能驾驶模型预测控制算法的最优参数选择
Pub Date : 2015-08-27 DOI: 10.1109/IVS.2015.7225773
Michael Henzler, M. Buchholz, K. Dietmayer
This paper presents an improved approach to the problem of energy efficient driving of heavy duty vehicles. The proposed model for a map-based Model Predictive Control (MPC) leads to an underlying Quadratic Programming (QP) optimization problem, allowing computationally efficient and robust solutions. A parameter estimation procedure is developed for a vehicle- and optimization-independent parametrization of the tradeoff between saving energy and keeping a desired vehicle velocity. Extensive simulations on a highway scenario for different optimization parameters give further insight to optimization properties, which can be utilized to enhance control performance. Compared to previous literature, we demonstrate a significant improvement of the computation time to under one-fifth of a millisecond, while maintaining (or even increasing) the fuel consumption reduction, which is 8.1 percent with the proposed approach compared to a standard cruise controller, without a decrease in the average cruising speed.
本文提出了一种解决重型车辆节能驾驶问题的改进方法。提出的基于映射的模型预测控制(MPC)模型导致一个潜在的二次规划(QP)优化问题,允许计算效率和鲁棒性的解决方案。针对节能与保持理想车速之间的权衡问题,提出了一种独立于车辆与优化的参数化估计方法。对不同优化参数的高速公路场景进行了广泛的模拟,进一步了解了优化特性,可以利用这些特性来提高控制性能。与之前的文献相比,我们证明了计算时间的显着改进到五分之一毫秒以下,同时保持(甚至增加)燃油消耗降低,与标准巡航控制器相比,该方法的燃油消耗降低了8.1%,而平均巡航速度没有降低。
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引用次数: 12
Safety beaconing rate control based on vehicle counting in WAVE 基于WAVE中车辆计数的安全信标速率控制
Pub Date : 2015-08-27 DOI: 10.1109/IVS.2015.7225905
Haiyue Piao, Yongtae Park, Byungjo Kim, Hyogon Kim
In the IEEE Wireless Access in Vehicular Environment (WAVE) environment, periodic beacon messages enable proximity awareness that helps prevent collisions. One of the barriers that hinder the beacon delivery is congestion, which means that the amount of beacon traffic exceeds the Dedicated Short Range Communication (DSRC) channel capacity. In this paper, we propose a scheme for vehicles to independently adjust the beaconing rate based on the estimated neighbor vehicle population. Unlike previously proposed works, the proposed scheme does not need cross-layer information such as channel busy ratio (CBR) in order to achieve significant beacon throughput. We demonstrate through extensive simulations that this scheme significantly improves the beacon throughput.
在IEEE车载环境无线接入(WAVE)环境中,周期性信标信息可以实现距离感知,有助于防止碰撞。阻碍信标传输的障碍之一是拥塞,这意味着信标流量的数量超过了专用短距离通信(DSRC)信道的容量。在本文中,我们提出了一种基于估计的邻居车辆数量来独立调整信标率的方案。与之前提出的方案不同,该方案不需要信道繁忙比(CBR)等跨层信息来实现显著的信标吞吐量。我们通过大量的仿真证明,该方案显著提高了信标吞吐量。
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引用次数: 6
Classifying driver's uncertainty about the distance gap at lane changing for developing trustworthy assistance systems 对驾驶员变道距离不确定性进行分类,开发可信赖的辅助系统
Pub Date : 2015-08-27 DOI: 10.1109/IVS.2015.7225858
Fei Yan, Lars Weber, A. Lüdtke
Driver's uncertainty in lane change situations could cause longer reaction times and even lead to wrong decisions, which is very dangerous for the critical driving task. We assume that reducing driver's uncertainty with assistance systems in lane change situations can not only increase traffic safety, but also increase driver's trust in assistance systems. In order to develop trustworthy assistance systems, this paper starts from classifying driver's uncertainty about distance gaps and studies the impact of distance gaps on driver's uncertainty at lane changing. In the driving simulator experiment, participants were asked to take steering or brake actions in different lane change situations. Their reaction times to an acoustic signal ordering to start changing lanes and subjective certainty scores were collected and analyzed. The results showed that with the constant closing speed of 10 km/h between the ego vehicle and rear vehicle, the brake action was more often preferred than the steering and participants were relatively certain with short reaction times at small distance gaps (<; 32m). At large distance gaps (> 44m), the steering was more often chosen than brake actions and participants were also certain with short reaction times. However, when the distance gap was in between (32m, 36m, 40m, 44m), participants were very uncertain and had relatively long reaction times.
驾驶员在变道情况下的不确定性会导致反应时间变长,甚至导致错误的决策,这对关键的驾驶任务来说是非常危险的。我们假设在变道情况下使用辅助系统减少驾驶员的不确定性不仅可以提高交通安全,而且可以增加驾驶员对辅助系统的信任。为了开发可信赖的辅助系统,本文从驾驶员对距离间隙的不确定性进行分类入手,研究距离间隙对驾驶员变道不确定性的影响。在驾驶模拟器实验中,参与者被要求在不同的变道情况下采取转向或刹车动作。研究人员收集并分析了他们对命令开始变道的声音信号的反应时间和主观确定性得分。结果表明:当主车与后车的接近速度为10 km/h时,在小间距(44m)时,选择制动动作的次数多于选择转向动作的次数,反应时间较短;选择转向动作的次数多于选择制动动作的次数,反应时间较短;然而,当距离间隔在32米、36米、40米、44米之间时,参与者的不确定性很大,反应时间也相对较长。
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引用次数: 14
Stochastic model predictive controller with chance constraints for comfortable and safe driving behavior of autonomous vehicles 基于机会约束的自动驾驶汽车舒适安全驾驶随机模型预测控制器
Pub Date : 2015-08-27 DOI: 10.1109/IVS.2015.7225701
David Lenz, Tobias Kessler, A. Knoll
In this paper, we address the application of stochastic model predictive control with chance constraints to autonomous driving. We use a condensed formulation of a linearized vehicle model to setup a quadratic program with nonlinear chance constraints, which can be solved with off-the-shelf optimization algorithms. We further show how obstacle information in the path planning stage can be converted into a set of linear state constraints that can be directly used in the control algorithm. The resulting controller is potentially real-time capable and achieves a tradeoff between safety and comfort in its control behavior.
本文研究了随机模型预测控制在自动驾驶中的应用。我们使用一个线性化车辆模型的简化公式来建立一个具有非线性机会约束的二次规划,该规划可以用现成的优化算法求解。我们进一步展示了如何将路径规划阶段的障碍物信息转换为一组可以直接用于控制算法的线性状态约束。由此产生的控制器具有潜在的实时性,并且在其控制行为中实现了安全性和舒适性之间的权衡。
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引用次数: 29
Vehicle trajectory prediction for adaptive cruise control 自适应巡航控制的车辆轨迹预测
Pub Date : 2015-08-27 DOI: 10.1109/IVS.2015.7225663
Sung Gu Yi, C. Kang, Seung-Hi Lee, C. Chung
In this paper, we propose a new vehicle trajectory prediction algorithm for adaptive cruise control (ACC). When vehicle trajectory prediction is not precise enough, it is possible for a neighboring vehicle to be detected as a target. Thus, we propose a new method using both yaw rate and curvature rate to precisely predict vehicle trajectory and to resolve an undesirable case in ACC system. The proposed method was validated via CarSim and MATLAB/Simulink. Also, we validated the proposed method via experimental results with a test vehicle on highway system for the practicality.
本文提出了一种新的自适应巡航控制(ACC)车辆轨迹预测算法。当车辆轨迹预测不够精确时,有可能将相邻车辆检测为目标。因此,我们提出了一种利用横摆角速度和曲率速率来精确预测车辆轨迹的新方法,以解决ACC系统中出现的不良情况。通过CarSim和MATLAB/Simulink对该方法进行了验证。最后,在公路系统上进行了车辆试验,验证了该方法的实用性。
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引用次数: 10
Automatic detection of traffic lights using support vector machine 基于支持向量机的交通信号灯自动检测
Pub Date : 2015-08-27 DOI: 10.1109/IVS.2015.7225659
Zhilu Chen, Quan Shi, Xinming Huang
Many traffic accidents occurred at intersections are caused by drivers who miss or ignore the traffic signals. In this paper, we present a new method for automatic detection of traffic lights that integrates both image processing and support vector machine techniques. An experimental dataset with 21299 samples is built from the captured original videos while driving on the streets. When compared to the traditional object detection and existing methods, the proposed system provides significantly better performance with 96.97% precision and 99.43% recall. The system framework is extensible that users can introduce additional parameters to further improve the detection performance.
在十字路口发生的许多交通事故都是由于司机错过或忽视交通信号造成的。本文提出了一种结合图像处理和支持向量机技术的交通信号灯自动检测新方法。根据在街道上驾驶时捕获的原始视频,构建了包含21299个样本的实验数据集。与传统的目标检测方法和现有方法相比,该系统具有96.97%的准确率和99.43%的召回率。系统框架是可扩展的,用户可以引入额外的参数来进一步提高检测性能。
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引用次数: 24
The influence of traffic on heavy-duty vehicle platoon formation 交通对重型车辆排队形的影响
Pub Date : 2015-08-27 DOI: 10.1109/IVS.2015.7225678
Kuo-Yun Liang, Q. Deng, J. Mårtensson, Xiaoliang Ma, K. Johansson
Heavy-duty vehicle (HDV) platooning is a mean to significantly reduce the fuel consumption for the trailing vehicle. By driving close to the vehicle in front, the air drag is reduced tremendously. Due to each HDV being assigned with different transport missions, platoons will need to be frequently formed, merged, and split. Driving on the road requires interaction with surrounding traffic and road users, which will influence how well a platoon can be formed. In this paper, we study how traffic may affect a merging maneuver of two HDVs trying to form a platoon. We simulate this for different traffic densities and for different HDV speeds. Even on moderate traffic density, a platoon merge could be delayed with 20 % compared to the ideal case with no traffic.
重型车辆(HDV)队列是一种显著降低尾随车辆燃油消耗的方法。通过靠近前面的车辆行驶,空气阻力大大减少。由于每辆HDV被分配了不同的运输任务,排将需要频繁地组建、合并和分裂。在道路上驾驶需要与周围的交通和道路使用者进行互动,这将影响组队的效果。在本文中,我们研究如何交通可能会影响合并机动的两个hdv试图形成一个排。我们针对不同的交通密度和不同的HDV速度进行了模拟。即使在交通密度适中的情况下,与没有交通的理想情况相比,队列合并也可能延迟20%。
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引用次数: 34
Time delay compensation for environmental sensors of high-level automated driving systems 高级自动驾驶系统环境传感器时延补偿
Pub Date : 2015-08-27 DOI: 10.1109/IVS.2015.7225743
S. Park, Beomjun Kim, Kyuwon Kim, Youngseop Son, K. Yi
This paper presents a time delay compensation algorithm for environmental sensors of automated driving systems. The time delay involved with the transmission of the measurements from the sensors to the processor cannot be negligible because it is responsible for estimation and control of the system. As the automotive environmental sensors such as laser scanner or radar perform measurements at a constant frequency, the measurement time latencies can be assumed to be constant. From this aspect, the constant time delay characteristics is analyzed via vehicle tests and compensated by forward estimation based coordinate transformation. The proposed compensation algorithm has been verified via test data based open loop simulation of Automated Driving Systems (ADS). It is shown that the proposed compensation enhances environment perception performance and driver's safety.
提出了一种自动驾驶系统中环境传感器的时延补偿算法。从传感器到处理器的测量传输所涉及的时间延迟是不可忽略的,因为它负责系统的估计和控制。由于激光扫描仪或雷达等汽车环境传感器以恒定的频率进行测量,因此可以假设测量时间延迟是恒定的。在此基础上,通过车辆试验分析了恒时延特性,并采用基于正演估计的坐标变换进行补偿。基于测试数据的自动驾驶系统开环仿真验证了所提补偿算法的有效性。结果表明,该补偿方案可提高驾驶员的环境感知性能和安全性。
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引用次数: 2
An experiment on ambient light patterns to support lane change decisions 支持变道决策的环境光模式实验
Pub Date : 2015-08-27 DOI: 10.1109/IVS.2015.7225735
Andreas Löcken, Heiko Müller, Wilko Heuten, Susanne CJ Boll
In the recent years, several automotive manufacturers started to integrate ambient light displays into cars to increase drivers' comfort. Expanding their possible application areas, we propose a display that continuously informs the driver of the vehicle's as well as the environment's state. We studied this display in a lane change maneuver, in which a driver has to decide if he or she can change lane in front of a faster closing car or brake to keep a safe distance to a slower car in front. We present results of an experiment for light patterns that are based on results of a design workshop and definitions for lane change decision aid systems (LCDAS) of ISO 17387. Though we used ISO's definitions for the timings, our participants felt that status updates on the display came too late. In addition, the abrupt warnings, implemented in one of the tested patterns, led to worse performance of the participants. On the other hand, we observed that participants liked a continuous encoding of the time-to-collision (TTC) and observed a decrease in missed opportunities to overtake. Therefore, we argue that the defined limits for the warning levels are not well suited to support drivers during decision making in our scenario. Our contribution lies in a novel way of supporting drivers during lane change using an ambient in-vehicle light display. We showed that a continuous light pattern might help drivers in decision making, while more research has to be done to validate this.
近年来,一些汽车制造商开始将环境光显示器集成到汽车中,以提高驾驶员的舒适度。为了扩展其可能的应用领域,我们提出了一种不断通知驾驶员车辆和环境状态的显示器。我们在变道机动中研究了这种显示,在变道机动中,驾驶员必须决定他或她是否可以在一辆快速驶近的汽车前面变道,或者刹车以保持与前面较慢的汽车的安全距离。我们根据设计研讨会的结果和ISO 17387的变道辅助决策系统(LCDAS)的定义,提出了一项光模式实验的结果。虽然我们使用了ISO的时间定义,但我们的参与者觉得显示上的状态更新来得太晚了。此外,在其中一个测试模式中实现的突然警告导致参与者的表现更差。另一方面,我们观察到参与者喜欢碰撞时间(TTC)的连续编码,并观察到错过超车机会的减少。因此,我们认为,在我们的场景中,定义的警告级别限制并不适合在决策过程中支持驾驶员。我们的贡献在于一种新颖的方式,即使用车内环境光显示器在变道过程中为驾驶员提供支持。我们表明,连续的光模式可能有助于司机做出决策,但还需要做更多的研究来验证这一点。
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引用次数: 30
Joint spatial- and Doppler-based ego-motion estimation for automotive radars 基于关节空间和多普勒的汽车雷达自运动估计
Pub Date : 2015-08-27 DOI: 10.1109/IVS.2015.7225789
M. Barjenbruch, Dominik Kellner, J. Klappstein, J. Dickmann, K. Dietmayer
An ego-motion estimation method based on the spatial and Doppler information obtained by an automotive radar is proposed. The estimation of the motion state vector is performed in a density-based framework. Compared to standard vehicle odometry the approach is capable to estimate the full two dimensional motion state with three degrees of freedom. The measurement of a Doppler radar sensor is represented as a mixture of Gaussians. This mixture is matched with the mixture of a previous measurement by applying the appropriate egomotion transformation. The parameters of the transformation are found by the optimization of a suitable join metric. Due to the Doppler information the method is very robust against disturbances by moving objects and clutter. It provides excellent results for highly nonlinear movements. Real world results of the proposed method are presented. The measurements are obtained by a 77GHz radar sensor mounted on a test vehicle. A comparison using a high-precision inertial measurement unit with differential GPS support is made. The results show a high accuracy in velocity and yaw-rate estimation.
提出了一种基于汽车雷达获取的空间信息和多普勒信息的自运动估计方法。运动状态向量的估计是在基于密度的框架中进行的。与标准车辆里程计相比,该方法能够估计具有三个自由度的完整二维运动状态。多普勒雷达传感器的测量用高斯信号的混合表示。通过应用适当的自我运动变换,该混合与先前测量的混合相匹配。通过优化合适的连接度量来确定转换的参数。由于多普勒信息,该方法对运动物体和杂波的干扰具有很强的鲁棒性。它为高度非线性运动提供了极好的结果。给出了该方法的实际结果。测量结果由安装在测试车辆上的77GHz雷达传感器获得。采用差分GPS支撑的高精度惯性测量单元进行了比较。结果表明,该方法具有较高的速度和偏航率估计精度。
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引用次数: 29
期刊
2015 IEEE Intelligent Vehicles Symposium (IV)
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