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

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GPS Signal Fault Diagnosis for Unmanned Rollers Based on Total Disturbance Observation and Support Vector Machine 基于全扰动观测和支持向量机的无人滚轮GPS信号故障诊断
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338595
Chongsong Hu, K. Song, H. Xie
The roller is a typical articulated multi-body vehicle with multi-degree of freedom in motion. Accurate and reliable position and heading angle measurements are important foundations for the accurate path-following of unmanned rollers. Due to the poor operation environment of the roller, the positioning signal often drifts or jumps, which affects the reliable operation of the system. To achieve reliable fault diagnostic in the positioning system, in this paper, a novel solution that combines total disturbance observation and support vector machine (SVM) classification, is proposed. A multi-body kinematic model is established with steering wheel angle and vehicle speed as inputs, and with the longitude, latitude and heading angle as outputs. The discrepancy of model estimates from the measured value is treated as total disturbance, to be estimated by the extended state observer. Then the estimated total disturbance, together with the measured position and heading angle are input into the support vector machine for faults classification. Experimental results show that the fault diagnosis accuracy is 95%, the improvement in accuracy and computational time is 9% and 12% respectively, compared with the conventional solution that only based on SVM.
滚轮是典型的多自由度铰接式多体车辆。准确可靠的位置和航向角测量是实现无人压路机精确路径跟踪的重要基础。由于压路机运行环境较差,定位信号经常出现漂移或跳变,影响系统的可靠运行。为了实现定位系统的可靠故障诊断,本文提出了一种将全扰动观测与支持向量机(SVM)分类相结合的定位系统故障诊断方法。建立了以方向盘角度和车速为输入,以经度、纬度和航向角为输出的多体运动学模型。模型估计值与实测值的差异被视为总扰动,由扩展状态观测器进行估计。然后将估计的总扰动与测量的位置和航向角一起输入支持向量机进行故障分类。实验结果表明,与仅基于支持向量机的传统方法相比,该方法的故障诊断准确率为95%,准确率和计算时间分别提高了9%和12%。
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引用次数: 0
Robust Cascaded Nonlinear Generalized Predictive Control with Sliding Mode Disturbance Observer for Permanent Magnet Synchronous Hub Motor 基于滑模扰动观测器的永磁同步轮毂电机鲁棒级联非线性广义预测控制
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338489
Jialun Cui, Zheng Chen, Jiangwei Shen, Shiquan Shen, Yonggang Liu
In this study, a nonlinear generalized predictive controller (NGPC) in a cascaded structure, combining with sliding mode disturbance observer (SDMO), is proposed to control the permanent magnet synchronous hub motor (PMSHM) with uncertainties and disturbances. The NGPC is designed on the basis of the Taylor series expansion to approximate the predictive response in finite time domain. Since NGPC cannot thoroughly remove the deviation in the load torque variation and parametric uncertainties, an improved SMDO is exploited to estimate and compensate the deviation of controller. The developed controller can fulfill the performance of strong robustness and fast dynamic response with easy regulation characteristics. The simulation results manifest the effectiveness of the designed control strategy applied to the PMSHM drive.
本文提出了一种基于级联结构的非线性广义预测控制器(NGPC),结合滑模扰动观测器(SDMO)对具有不确定性和扰动的永磁同步轮毂电机(PMSHM)进行控制。NGPC是在Taylor级数展开的基础上设计的,用于在有限时域近似预测响应。由于NGPC不能彻底消除负载转矩变化和参数不确定性带来的偏差,利用改进的SMDO来估计和补偿控制器的偏差。该控制器具有鲁棒性强、动态响应快、易于调节等特点。仿真结果表明了所设计的控制策略在永磁同步电机驱动中的有效性。
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引用次数: 0
Multi-sensor Spatial and Time Scale Fusion Method for Off-road Environment Personnel Identification 越野环境人员识别多传感器时空尺度融合方法
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338651
Xu Tao, Fan Jingjing, Guan Shuai, Liu Zhipeng
Unmanned vehicle can be used as a transport tool for teams and groups to accompany and follow soldiers, reduce the load of team members and identify team members accurately in real time. It is a prerequisite for the realization of control algorithm and one of the core technologies for automatic control of military vehicles. Aiming at the problem of personnel identification under the fusion perception of lidar and camera, especially the problem of multi-sensor space and time synchronization, this paper proposes a solution based on multi-sensor fusion, and designs fusion criteria of space scale, time scale and personnel identification. The experimental results show that a designed personnel identification algorithm based on multi-sensor space and time fusion can accurately identify personnel targets in complex environment, and the intersection ratio of lidar and camera fusion algorithm exceeds 95%.
无人驾驶车辆可以作为团队和团体的运输工具,陪伴和跟随士兵,减轻团队成员的负担,实时准确识别团队成员。它是控制算法实现的前提,是军用车辆自动控制的核心技术之一。针对激光雷达与相机融合感知下的人员识别问题,特别是多传感器空间和时间同步问题,提出了一种基于多传感器融合的解决方案,设计了空间尺度、时间尺度和人员识别的融合准则。实验结果表明,设计的基于多传感器时空融合的人员识别算法能够准确识别复杂环境下的人员目标,激光雷达与相机融合算法的交集率超过95%。
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引用次数: 1
A driving cycle construction methodology combining Markov chain with variation parameters and Monte Carlo 一种结合变参数马尔可夫链和蒙特卡罗的驱动循环构造方法
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338594
Jiaming Xing, Yuanjian Zhang, Chong Guo, Zhuoran Hou, Peng Liu, Shibo Li
When comparing the environmental protection and economy of different cars, it is necessary for cars to run in the same driving cycle to obtain the pollutant emission and fuel consumption. However, in the actual driving process, the performance of the vehicle may be markedly different from the performance in test cycle. In order to generate the driving cycle that can represent the actual driving process, this paper adopts the driving data of an express truck with specific driving routes to construct the typical driving cycle of a city by combining Markov chain with Monte Carlo random sampling. The random response is added in the construction process, and the variation parameter is used to simulate the sudden traffic situation. CCPV and CPV parameters are set to evaluate the generated driving cycle. Through Simulink simulation, the reliability of the generated driving cycle is verified and the influence of different statistical characteristics is determined.
在比较不同汽车的环保性和经济性时,有必要让汽车在相同的行驶循环中运行,以获得污染物排放和燃油消耗。然而,在实际驾驶过程中,车辆的性能可能与测试周期中的性能存在明显差异。为了生成能够代表实际行驶过程的行驶循环,本文采用特定行驶路线的快运货车行驶数据,结合马尔可夫链和蒙特卡洛随机抽样,构建城市的典型行驶循环。在施工过程中加入随机响应,利用变异参数模拟突发交通情况。设置CCPV和CPV参数,评估产生的行驶周期。通过Simulink仿真,验证了生成的驱动循环的可靠性,并确定了不同统计特性的影响。
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引用次数: 0
Model Based Design and Experimental Test of Brake-By-Wire Controller 基于模型的线控制动控制器设计与试验研究
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338622
Jing Houhua, Liu Haifeng, Guan Yihang
Brake by wire is a key technology in the motion control level of autonomous vehicles. In order to provide a flexible control interface for the decision-making level, the hardware of the brake-by-wire controller is designed, and the active hydraulic boosting law is implemented using model-based-design method. The application verification is carried out on the experimental bench. The results show it is feasible to use the model-based-design method for the brake-by-wire controller development.
线控制动是自动驾驶汽车运动控制层面的一项关键技术。为了给决策层提供灵活的控制接口,设计了线控制动控制器的硬件,采用基于模型的设计方法实现了主动液压增压规律。在实验台上进行了应用验证。结果表明,采用基于模型的设计方法开发线控制动控制器是可行的。
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引用次数: 0
Analysis of performance degradation of lithium iron phosphate power battery under slightly overcharging cycles 轻度过充循环下磷酸铁锂动力电池性能退化分析
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338507
Xiaogang Wu, Yu Chen, Xuhui Han, Jiuyu Du, Tao Wen, Yizhao Sun
Lithium-ion batteries may be slightly overcharged due to the errors in the Battery Management System (BMS) state estimation when used in the field of vehicle power batteries, which may lead to problems such as battery performance degradation and battery stability degradation. Therefore, this paper conducts an experimental study on the influence of slightly overcharging cycles on battery performance degradation, and builds a semi-empirical capacity degradation model under slightly overcharging cycles on this basis. The experimental results show that the slightly overcharging cycle causes the capacity decay of the battery to be significantly accelerated, and its capacity decay will also cause the capacity “diving” phenomenon at the end of its life under normal cycle conditions. The slightly overcharging cycle has little effect on the internal polarization resistance of the battery. But it has a greater impact on the ohmic internal resistance due to the thickening of the SEI film.
锂离子电池在车用动力电池领域使用时,由于电池管理系统(Battery Management System, BMS)状态估计存在误差,可能会导致锂离子电池轻微过充,从而导致电池性能下降、电池稳定性下降等问题。因此,本文对微过充电周期对电池性能退化的影响进行了实验研究,并在此基础上建立了微过充电周期下的半经验容量退化模型。实验结果表明,轻微过充循环使电池容量衰减明显加速,在正常循环条件下,其容量衰减还会在其寿命结束时造成容量“跳水”现象。微过充循环对电池内部极化电阻影响不大。但由于SEI膜的增厚,对欧姆内阻的影响较大。
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引用次数: 1
Data-driven active disturbance rejection net power control of proton exchange membrane fuel cell* 质子交换膜燃料电池数据驱动的自抗扰净功率控制*
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338567
Y. Zhang, Zhichao Fu, Qihong Chen, Liyan Zhang, Keliang Zhou, Zhihua Deng
Proton exchange membrane fuel cell (PEMFC) is an environmentally friendly and efficient power generation device. It offers promising advantages over conventional power sources in backup power supplies, distributed generation and vehicle power. A rapid response to the actual power required by load is of great significance to improve the economy and efficiency of the system. However, due to various uncertainties such as frequent disturbances and inaccurate model, the net power control has certain challenges. Therefore, a data-driven nonlinear subspace identification method is developed to build the model of net power. A segmented and consecutive step response of net power for PEMFC system are identified and analyzed, the models are verified by high-fidelity simulation data. Data-driven active disturbance rejection control (ADRC) algorithm is developed to control the model. Internal and external disturbances are considered as a total term, which is estimated and compensated by real-time input-output data and ADRC, respectively. Compared with the integral absolute error of the conventional proportion integral and proportion integral derivative control, the performance of ADRC is improved by about 89.81 % and 78.92%, respectively. Therefore, the proposed ADRC can improve the dynamic performance of PEMFC system in terms of set-point tracking performance, disturbance rejection performance and robustness.
质子交换膜燃料电池(PEMFC)是一种环保高效的发电设备。与传统电源相比,它在备用电源、分布式发电和车载电源方面具有很好的优势。对负荷实际所需功率的快速响应对提高系统的经济性和效率具有重要意义。然而,由于各种不确定因素,如频繁的干扰和不准确的模型,对净功率控制提出了一定的挑战。为此,提出了一种数据驱动的非线性子空间辨识方法来建立净功率模型。分析了PEMFC系统净功率的分段连续阶跃响应,并用高保真仿真数据验证了模型的正确性。采用数据驱动自抗扰控制算法对模型进行控制。将内部和外部干扰视为一个总项,分别由实时输入输出数据和自抗扰控制器进行估计和补偿。与传统比例积分控制和比例积分导数控制的积分绝对误差相比,该自抗扰控制器的性能分别提高了89.81%和78.92%。因此,所提出的自抗扰控制器可以在设定点跟踪性能、抗干扰性能和鲁棒性方面提高PEMFC系统的动态性能。
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引用次数: 0
Target Recognition and Range-measuring Method based on Binocular Stereo Vision 基于双目立体视觉的目标识别与测距方法
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338662
Guan Shuai, Ma Wenlun, Fan Jingjing, Liu Zhipeng
Aiming at the problems of high cost and limited installation of traditional unmanned vehicle environment perception methods, this paper proposes a method of personnel identification and distance measurement based on the fusion of YOLOv4 and binocular stereo vision. Through the annotation of the data set, the Darknet deep learning framework is used to train and recognize the personnel, and the binocular camera disparity data is used for personnel distance detection. The experimental results show that the recognition accuracy of this method is 0.941 and the distance error is less than 5%, which can meet the task requirements of unmanned vehicle and provide technical support for solving the environment perception problems of autonomous driving vehicle.
针对传统无人车环境感知方法成本高、安装受限等问题,本文提出了一种基于YOLOv4与双目立体视觉融合的人员识别与距离测量方法。通过对数据集的标注,利用Darknet深度学习框架对人员进行训练和识别,利用双目摄像机视差数据进行人员距离检测。实验结果表明,该方法的识别精度为0.941,距离误差小于5%,能够满足无人驾驶车辆的任务要求,为解决自动驾驶车辆的环境感知问题提供技术支持。
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引用次数: 2
Object detection algorithm based on improved Yolov3-tiny network in traffic scenes 基于改进Yolov3-tiny网络的交通场景目标检测算法
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338478
Zhenghao Wang, Linhui Li, Lei Li, Jiahao Pi, Shuoxian Li, Yafu Zhou
The object detection based on deep learning is an important application in the field of vehicle environment perception, which has been a hot topic in recent years. We propose a novel improved Yolov3-tiny to implement more accurate object detection for the objects in traffic scenes. We employ K-means algorithm to cluster the common objects in traffic scenes to obtain a suitable size and numbers of anchor box. In addition, we modify modifying detection scale and the backbone network structure of Yolov3-tiny, improving the detection accuracy for small object. The stereo vision is also introduced to improve the accuracy of boundary location. Experiments results demonstrate that the improved yolo-tiny has higher accuracy than the original algorithm and it also meet the requirement of real-time performance.
基于深度学习的目标检测是车辆环境感知领域的重要应用,是近年来研究的热点。我们提出了一种新的改进的Yolov3-tiny,以实现对交通场景中物体的更精确的目标检测。采用K-means算法对交通场景中常见目标进行聚类,得到合适的锚盒大小和数量。此外,我们还修改了Yolov3-tiny的检测尺度和骨干网络结构,提高了对小目标的检测精度。为了提高边界定位的精度,还引入了立体视觉技术。实验结果表明,改进后的yolo-tiny算法在满足实时性要求的前提下,具有较高的精度。
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引用次数: 4
The Data Protection of Intelligent Connected Vehicles Cloud Control Framework Using Fully Homomorphic Encryption 基于全同态加密的智能网联汽车云控制框架数据保护
Pub Date : 2020-12-18 DOI: 10.1109/CVCI51460.2020.9338620
Yan Cui, Siqi Li, Yue Wang, Bolin Gao
With the development of Intelligent Connected Vehicles (ICVs), Cloud Control Platform is becoming an important part to compute driving strategies. However, when strategies are put to cloud, some of vehicle manufacturers' private data must be sent to the cloud, like Engine Map, which are core data for vehicle manufactures. How to protect these data has been the largest obstacle for the ICVs. Thus, this paper proposes a new framework in which Fully Homomorphic Encryption (FHE) and Blockchain technology are combined to compute encryption data on the cloud and record trails of cloud request. In this framework, private data can be protected, the scope of data usage will be limited, and at the same time, the execution of specific type of computations with encryption data on the cloud are fulfilled. In the end, with the help of Simple Encrypted Arithmetic Library (SEAL) developed by Microsoft Research, and IBM blockchain framework Hyperledger Fabric, this framework is verified to be feasible to build a trustworthy ICVs cloud computing system.
随着智能网联汽车的发展,云控制平台正成为计算驾驶策略的重要组成部分。然而,当战略被放到云端时,一些汽车制造商的私有数据必须被发送到云端,比如引擎地图,这是汽车制造商的核心数据。如何保护这些数据一直是icv面临的最大障碍。因此,本文提出了一种新的框架,该框架将完全同态加密(FHE)和区块链技术相结合,计算云上的加密数据并记录云请求的轨迹。在这个框架下,可以保护私有数据,限制数据的使用范围,同时实现在云端使用加密数据执行特定类型的计算。最后,借助微软研究院开发的简单加密算法库(Simple Encrypted Arithmetic Library, SEAL)和IBM区块链框架Hyperledger Fabric,验证了该框架构建可信icv云计算系统的可行性。
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引用次数: 3
期刊
2020 4th CAA International Conference on Vehicular Control and Intelligence (CVCI)
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