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2018 IEEE 14th International Conference on Automation Science and Engineering (CASE)最新文献

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Application of Generative Adversarial Networks for Intelligent Fault Diagnosis 生成对抗网络在智能故障诊断中的应用
Pub Date : 2018-08-01 DOI: 10.1109/COASE.2018.8560528
Sican Cao, Long Wen, Xinyu Li, Liang Gao
Fault diagnosis has attracted great attention on preventing the serious consequences from happening and guaranteeing the stability and reliability of machinery equipment. With the rapid development of artificial intelligence, Deep Learning (DL) based approaches begin to play great importance in the field of fault diagnosis. In this research, we proposed an image conversion pre-processing method to transform the time-domain signals of fault diagnosis into 2D images. And a designed structure of Generative Adversarial Networks (GAN) modeled by Convolutional Neural Network (CNN) is proposed to make the classification of fault. Datasets with different capacities are also experimented to study the performance of GAN on limited data. The results illustrate the potential of GAN on the small sample classification of fault diagnosis.
故障诊断对于防止严重后果的发生,保证机械设备的稳定性和可靠性已引起人们的高度重视。随着人工智能的快速发展,基于深度学习的方法开始在故障诊断领域发挥重要作用。在本研究中,我们提出了一种图像转换预处理方法,将故障诊断的时域信号转换为二维图像。提出了一种基于卷积神经网络(CNN)建模的生成式对抗网络(GAN)结构,用于故障分类。在不同容量的数据集上进行实验,研究GAN在有限数据上的性能。结果说明了GAN在故障诊断小样本分类方面的潜力。
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引用次数: 13
On-line Tool Wear Monitoring via Sparse Coding Based on DCT and WPD 基于DCT和WPD稀疏编码的刀具磨损在线监测
Pub Date : 2018-08-01 DOI: 10.1109/COASE.2018.8560437
Xiaolong Yu, Rongchuan Wang, Yungao Shi, K. Zhu
The adaptive and on-line tool wear monitoring is of great importance to improve the milling precision and efficiency. In traditional tool wear monitoring, feature extraction of cutting force signal by time-frequency method was usually off-line and needed signal reconstruction. In this paper, a novel online tool wear monitoring method is proposed. In the method, the sparse coefficients is measured by sparse coding based on DCT and WPD and then utilized to indicate the tool wear level without signal reconstruction. Experiments of tool wear monitoring are conducted for high speed CNC manufacturing. The simulation results show that the proposed method is capable to indicate tool wear level and robust to cutting conditions
刀具磨损自适应在线监测对提高铣削精度和效率具有重要意义。在传统的刀具磨损监测中,采用时频法提取切削力信号的特征通常是离线的,需要进行信号重构。提出了一种新的刀具磨损在线监测方法。该方法通过基于DCT和WPD的稀疏编码来测量稀疏系数,然后在不进行信号重构的情况下利用稀疏编码来表示刀具磨损程度。针对高速数控加工进行了刀具磨损监测实验。仿真结果表明,该方法能够反映刀具的磨损程度,对切削工况具有较强的鲁棒性
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引用次数: 0
A Centralized Framework for System-Level Control and Management of Additive Manufacturing Fleets 增材制造机群系统级控制与管理的集中框架
Pub Date : 2018-08-01 DOI: 10.1109/COASE.2018.8560434
Efe C. Balta, D. Tilbury, K. Barton
In most industrial additive manufacturing (AM) applications a set of AM machines (AM-Fleet) are used in parallel. An AM-Fleet often consists of machines from various vendors and may include different AM processes. AM processes often suffer from poor repeatability within a single build, between builds on the same machine, and from machine to machine. AM's lack of robustness is often attributed to insufficient in-process monitoring and feedback control, as well as unknown modeling dynamics, and a lack of process standards. To effectively monitor and control AM-Fleets, system-level approaches must be devised. In this work, a centralized approach is proposed for the system-level control and management of AM-Fleets. Integrating such an approach has advantages in terms of system-level intelligent decision making for AM-Fleets. Key problems that needs to be solved and the challenges for a centralized approach are discussed in this work. The architecture of the proposed framework is presented with discussions on the individual components. A discrete event model for the system-level monitoring and control of AM machines is also proposed to support the presented framework. The use of discrete event models creates an abstract representation of the AM machine that enables the supervision of the physical system. An illustrative example that demonstrates a system-level run-to-run anomaly detection case is discussed. The proposed framework will provide an analytical foundation for systematic anomaly detection, scheduling, and decision making in AM-Fleets.
在大多数工业增材制造(AM)应用中,一组AM机器(AM- fleet)是并行使用的。AM- fleet通常由来自不同供应商的机器组成,可能包括不同的AM工艺。AM过程在单个构建中、在同一台机器上的构建之间以及从一台机器到另一台机器之间的可重复性很差。AM缺乏鲁棒性通常归因于过程中监控和反馈控制不足,以及未知的建模动力学,以及缺乏过程标准。为了有效地监测和控制am - fleet,必须设计系统级方法。本文提出了一种用于am - fleet系统级控制和管理的集中式方法。就am车队的系统级智能决策而言,集成这种方法具有优势。本文讨论了集中管理需要解决的关键问题和面临的挑战。通过对各个组件的讨论,提出了所建议框架的体系结构。为了支持所提出的框架,还提出了一个用于增材机械系统级监测和控制的离散事件模型。离散事件模型的使用创建了AM机器的抽象表示,使物理系统的监督成为可能。讨论了一个演示系统级运行到运行异常检测的示例。该框架将为am - fleet系统异常检测、调度和决策提供分析基础。
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引用次数: 11
Precision Grasp Control with a Pneumatic Gripper and a Novel Fingertip Force Sensor 基于气动爪和新型指尖力传感器的精确抓握控制
Pub Date : 2018-08-01 DOI: 10.1109/COASE.2018.8560540
M. Saadatzi, S. Das, Indika B. Wijayasinghe, D. Popa, J. Baptist
Grippers equipped with tactile sensors are very important in high performance robotic manipulation tasks, where the robot must adapt to shape and characteristics of unknown objects. Such adaptability reduces cycle time and cost, eliminates the need for customization and tool changers, and enhances the automation process. In addition, while handling fragile objects, it may be necessary to regulate the grip force to avoid slipping, dropping, or breaking the object being manipulated. In this study, a pneumatic gripper was augmented with a novel custom-fabricated compliant skin sensor packaged in the gripper fingertip. The sensor is a strain gauge printed onto a Kapton substrate, patterned with a polymer piezo-resistive material, and encased in an elastic Silicone encapsulant. Using feedback from this sensor, a model-free explicit force control scheme was implemented and compared to the native pressure regulation scheme to control gripping force. Experiments were performed to investigate the performance of this gripper compared against similar data obtained from a commercial load cell. Results indicate that the augmented gripper can maintain a more precise control of the force applied and can better accommodate grasp transitions.
在高性能机器人操作任务中,机器人必须适应未知物体的形状和特征,配备触觉传感器的抓手是非常重要的。这种适应性减少了周期时间和成本,消除了定制和更换刀具的需要,并增强了自动化过程。此外,在处理易碎物体时,可能需要调节握力,以避免滑倒,掉落或损坏被操纵的物体。在这项研究中,气动夹持器在夹持器指尖增加了一种新型定制的柔性皮肤传感器。该传感器是一个印在卡普顿基板上的应变计,用聚合物压阻材料制成图案,并包裹在弹性硅胶密封剂中。利用该传感器的反馈,实现了无模型显式力控制方案,并与原有的压力调节方案进行了比较。进行了实验,以调查该抓手的性能与类似的数据,从商业称重传感器获得。结果表明,增强的夹持器可以更精确地控制所施加的力,并且可以更好地适应夹持器的转换。
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引用次数: 9
An on-line tool wear monitoring method based on cutting power 基于切削功率的刀具磨损在线监测方法
Pub Date : 2018-08-01 DOI: 10.1109/COASE.2018.8560412
Teng Wan, Xingzheng Chen, C. Li, Ying Tang
In a CNC batch process, excessive tool wear will lead to a bad surface quality of the final product. On-line tool wear monitoring is recognized as an effective method to reduce the impact of the tool wear on surface quality. In this paper, a cutting power model is firstly established with the consideration of tool wear and cutting parameters. A novel on-line tool wear monitoring approach for CNC batch processing is then proposed and a monitoring system is developed. Result of the case study shows that the proposed approach is effective in tool wear on-line monitoring.
在数控批量加工过程中,刀具的过度磨损会导致最终产品的表面质量不佳。刀具磨损在线监测是减少刀具磨损对表面质量影响的有效方法。本文首先建立了考虑刀具磨损和切削参数的切削功率模型。提出了一种新的数控批量加工刀具磨损在线监测方法,并开发了一套监测系统。实例研究结果表明,该方法在刀具磨损在线监测中是有效的。
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引用次数: 4
Preservation of Traffic Liveness in MPC Schemes for Guidepath-based Transport Systems 基于路径的交通系统MPC方案中交通活力的保存
Pub Date : 2018-08-01 DOI: 10.1109/COASE.2018.8560478
S. Reveliotis
Guidepath-based transport systems is a pertinent abstraction for the traffic that is generated in many contemporary applications, ranging from industrial material handling and robotics, to computer game animations and the qubit transport systems that are employed in quantum computing. In some recent works of ours, we have proposed the traffic coordination in this class of systems according to a model predictive control (MPC) scheme that seeks to maximize the traffic throughput while retaining computational tractability for the corresponding scheduling problem. In this work we perform a more systematic investigation of the conditions that must be observed by the adopted MPC scheme in order to ensure the liveness of the resulting traffic. The presented results span a number of possible configurations of the underlying guidepath-based transport systems, and integrate and extend a variety of past results concerning the liveness-enforcing supervision of AGV and other complex resource allocation systems.1
基于路径的传输系统是许多当代应用中产生的流量的相关抽象,从工业材料处理和机器人到计算机游戏动画和量子计算中使用的量子比特传输系统。在我们最近的一些工作中,我们根据模型预测控制(MPC)方案提出了这类系统的交通协调,该方案寻求最大的交通吞吐量,同时保留相应调度问题的计算可追溯性。在这项工作中,我们对所采用的MPC方案必须遵守的条件进行了更系统的调查,以确保由此产生的交通的活力。本文的研究结果涵盖了潜在的基于路径的交通系统的多种可能配置,并整合和扩展了过去关于AGV和其他复杂资源分配系统的活动性监督的各种结果
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引用次数: 6
Online-Monitoring Autonomous Transport Robots with an R-valued Temporal Logic 基于r值时序逻辑的自主运输机器人在线监测
Pub Date : 2018-08-01 DOI: 10.1109/COASE.2018.8560421
Felix Lorenz, H. Schlingloff
In this paper, we introduce real-valued temporal logic (RVTL) for online monitoring of reactive and cyber-physical systems. Our approach is based on classical metric temporal logic (MTL) with a real-valued semantics, where the truth value of a formula with respect to a finite trace depends on the distance between the end of the trace and the bound of the temporal operators in the formula. The assumed time model is dense and pointwise, i.e., the basic propositions refer to events reported by the system at specific times. We show that our logic is applicable for collaborating cyber-physical systems by giving example formulae from a case study of autonomous transport robots in a factory. We sketch an algorithm for monitoring RVTL formulae at runtime, and report on experiences with this algorithm in an actual industrial deployment of the case study.
在本文中,我们引入实值时间逻辑(RVTL)用于在线监测无功系统和网络物理系统。我们的方法基于具有实值语义的经典度量时间逻辑(MTL),其中公式相对于有限轨迹的真值取决于轨迹末端与公式中时间算子界之间的距离。假设的时间模型是密集的、点向的,即基本命题是指系统在特定时间报告的事件。我们通过给出工厂自动运输机器人案例研究中的示例公式来证明我们的逻辑适用于协作的网络物理系统。我们概述了一种在运行时监控RVTL公式的算法,并报告了在实际工业部署案例研究中使用该算法的经验。
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引用次数: 7
The introduction of VR System development for Nuclear Power Plant(NPP) in Korea* 韩国核电厂(NPP)虚拟现实系统开发的介绍*
Pub Date : 2018-08-01 DOI: 10.1109/COASE.2018.8560486
Lim Byung
By using Virtual Reality(VR) technology which is one of the core technologies 4th industry revolution, we are developing VR System development for Nuclear power plants from April 2018 to March 2021. This Research and Development(R&D) project includes VR based “Walk-down System development”, “optimal path tracking system development”, “major equipment transfer and installation simulation”, etc. When fully developed, These R&D results will be applied the construction of the Shin-Kori unit 5,6 nuclear power plant construction to check design interference, to establish work planning, and to effectively collect construction experience knowledges to improve our future construction projects in the future. This paper will introduce major technological developments contents of this R&D project. It is expected that the results of this study will contribute dramatically to enhance the efficiency of nuclear power plant design process and the method of construction by simulating installation method of major equipment such as reactor, steam generators and turbine before installing them in the Shin-Kori unit 5,6.
从2018年4月到2021年3月,我们将利用第四次工业革命的核心技术之一虚拟现实(VR)技术,为核电站开发VR系统。本研发项目包括基于VR的“Walk-down系统开发”、“最优路径跟踪系统开发”、“重大设备转移与安装仿真”等。这些研究成果将应用于新古里核电站5、6号机组的建设中,以检查设计干扰,制定工作计划,并有效地收集施工经验知识,以改善我们未来的建设项目。本文将介绍该研发项目的主要技术开发内容。通过对新古里5号机组、6号机组的主要设备,如反应堆、蒸汽发生器、汽轮机等进行安装前的模拟安装,预计将对提高核电站设计过程的效率和施工方法做出重大贡献。
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引用次数: 0
Fusion of Human Demonstrations for Automatic Recovery during Industrial Assembly 工业装配过程中自动恢复的人类演示融合
Pub Date : 2018-08-01 DOI: 10.1109/COASE.2018.8560388
Arne Muxfeldt, Jochen J. Steil
A novel approach for recovering from errors during automated assembly in typical mating operations is presented. It is based on automated error detection w.r.t. a predefined process model, followed by choosing a recovery strategy from an optimized repository. The latter comprises successful strategies that were recorded from human demonstration during a large scale user study. This paper shows how to enhance the process model with additional data, how to record new strategies in case where no suitable strategy is found, how to optimize a set of strategies, and how to select the most appropriate recovering strategy. A particular focus is the fusion of various human demonstrations in order to optimize them. The added value of the new approach is demonstrated by an experimental validation.
提出了一种典型装配过程中自动装配误差恢复的新方法。它基于自动错误检测,即预定义的流程模型,然后从优化的存储库中选择恢复策略。后者包括在大规模用户研究期间从人类演示中记录的成功策略。本文介绍了如何利用附加数据增强过程模型,如何在没有找到合适策略的情况下记录新的策略,如何优化一组策略,以及如何选择最合适的恢复策略。一个特别的焦点是各种人类演示的融合,以优化它们。实验验证了该方法的附加价值。
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引用次数: 1
Optimal robot base placements for coverage tasks 覆盖任务的最佳机器人基地位置
Pub Date : 2018-08-01 DOI: 10.1109/COASE.2018.8560402
Rawan Kalawoun, S. Lengagne, Y. Mezouar
Robotic coverage problem is addressed in several fields: painting, stripping, grist-blasting, etc. In multi-robot systems, the collaboration between robots reduces the cycle time and increases the coverage task accuracy. However, the robot base placement must be deeply studied to attend those goals. In this article, we propose a new approach in order to assign tasks within a multiple robots system. In addition, we develop an optimization strategy to find the optimal number of robots with their optimal poses required to cover the entire surface. To assess our method, our algorithm was tested on regular surfaces such as cylinder and hemisphere, and on a complex surface represented in a car shell.
机器人覆盖问题在几个领域得到解决:喷漆、剥离、喷砂等。在多机器人系统中,机器人之间的协作减少了周期时间,提高了覆盖任务的精度。然而,为了实现这些目标,必须对机器人基座的布置进行深入研究。在本文中,我们提出了一种在多机器人系统中分配任务的新方法。此外,我们还开发了一种优化策略,以找到覆盖整个表面所需的最佳机器人数量和最佳姿态。为了评估我们的方法,我们的算法在规则表面(如圆柱体和半球)以及以汽车外壳为代表的复杂表面上进行了测试。
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引用次数: 5
期刊
2018 IEEE 14th International Conference on Automation Science and Engineering (CASE)
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