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2014 IEEE International Conference on Robotics and Biomimetics (ROBIO 2014)最新文献

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Nonlinear inverse reinforcement learning with mutual information and Gaussian process 基于互信息和高斯过程的非线性逆强化学习
Pub Date : 2014-12-01 DOI: 10.1109/ROBIO.2014.7090537
De C. Li, Yu Q. He, Feng Fu
In this paper, a mutual information (MI) and Extreme Learning Machine (ELM) based inverse reinforcement learning (IRL) algorithm, which termed as MEIRL, is proposed to construct nonlinear reward function. The basic idea of MIIRL is that, similar to GPIRL, the reward function is learned by using Gaussian process and the importance of each feature is obtained by using automatic relevance determination (ARD). Then mutual information is employed to evaluate the impact of each feature to the reward function, based on which extreme learning machine is introduced along with an adaptive model construction procedure to choose the optimal subset of features and the performance of the original GPIRL algorithm is enhanced as well. Furthermore, to demonstrate the effectiveness of MEIRL, a simulation called highway driving is constructed. The simulation results show that MEIRL is comparable with the state of art IRL algorithms in terms of generalization capability, but more efficient while the number of features is large.
本文提出了一种基于互信息(MI)和极限学习机(ELM)的逆强化学习(IRL)算法(MEIRL)来构造非线性奖励函数。MIIRL的基本思想是,与GPIRL类似,使用高斯过程学习奖励函数,并使用自动关联确定(ARD)来获得每个特征的重要性。然后利用互信息来评估每个特征对奖励函数的影响,在此基础上引入极限学习机并自适应模型构建过程来选择最优的特征子集,提高了原GPIRL算法的性能。此外,为了验证MEIRL的有效性,构建了高速公路驾驶仿真。仿真结果表明,MEIRL在泛化能力上可与现有的IRL算法相媲美,但在特征数量较大时效率更高。
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引用次数: 3
A flexible tension-pressure tactile sensitive sensor array for the robot skin 一种用于机器人皮肤的柔性张压触觉敏感传感器阵列
Pub Date : 2014-12-01 DOI: 10.1109/ROBIO.2014.7090749
Caixia Liu, Ying Huang, Ping Liu, Yugang Zhang, Haitao Yuan, Leiming Li, Y. Ge
In this paper, a flexible tension-pressure tactile sensitive sensor array is proposed for intelligent robot skin to detect external pressure in the case of tensile and bendability condition. Such flexible sensitive tension-pressure tactile sensor is fabricated with carbon nanotubes (CNTs) and carbon black (CB) as conductive filler and silicone rubber as insulating matrix. Studying the extension-pressure resistance characteristic upon CNTs and CB as conductive filler to silicon rubber sensitive unit, the following conclusions are drawn: the CNTs-CB forms a solid conductive network structure “botryoid” in the system of conductive rubber filled with CNTs and CB, and the resistance of conductive rubber filled with CNTs and CB is quite sensitive with good linearity in the case where in tension and pressure process with filler mass fraction as 4% and the mass ratio of CNTs and CB as 2:3. In such kind of tension-pressure tactile sensor array based on conductive rubber filled by CNTs and CB, elastic electrodes overcome the disadvantage of the non-tension traditional sensor, therefore achieving the flexibility of sensor array. Such sensor array can detect pressure and tension in syncronization, and can be applied to robot flexible skin joints.
本文提出了一种柔性张压触觉敏感传感器阵列,用于智能机器人皮肤在拉伸和弯曲条件下检测外部压力。以碳纳米管(CNTs)和炭黑(CB)为导电填料,硅橡胶为绝缘基体,制成柔性灵敏的张压触觉传感器。研究了CNTs和CB作为硅橡胶敏感单元导电填料的抗伸压特性,得出以下结论:CNTs-CB在CNTs-CB填充导电橡胶体系中形成固体导电网络结构“botryoid”,在填料质量分数为4%、CNTs-CB质量比为2:3的拉伸和加压过程中,CNTs-CB填充导电橡胶的电阻非常敏感,线性度好。在这种以CNTs和CB填充导电橡胶为基础的张力-压力触觉传感器阵列中,弹性电极克服了传统非张力传感器的缺点,从而实现了传感器阵列的灵活性。该传感器阵列可以同步检测压力和张力,可以应用于机器人柔性皮肤关节。
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引用次数: 1
Manipulation task simulation using ROS and Gazebo 操作任务模拟使用ROS和Gazebo
Pub Date : 2014-12-01 DOI: 10.1109/ROBIO.2014.7090732
Wei Qian, Zeyang Xia, Jing Xiong, Yangzhou Gan, Yangchao Guo, Shaokui Weng, Hao Deng, Ying Hu, Jianwei Zhang
This paper intends to create a simulation of manipulator and illustrates the methods of how to implement robot control in a short time. Here we complete the grasp and place mission using Gazebo virtual world and Robot Operating System (ROS). ROS is a distributed framework that is widely used in robotics. Considering the advantages of its easier hardware abstraction and code reuse, ROS was chosen to rapidly organize task architecture and, due to its compatibility with ROS, Gazebo was chosen as the main platform to simulate the designated motion of virtual manipulator.
本文拟建立一个机械臂的仿真模型,并举例说明如何在短时间内实现机器人的控制。在这里,我们使用Gazebo虚拟世界和机器人操作系统(ROS)完成抓取和放置任务。ROS是一种广泛应用于机器人领域的分布式框架。考虑到ROS易于硬件抽象和代码重用的优点,选择ROS快速组织任务体系结构,并且由于其与ROS的兼容性,选择Gazebo作为主要平台来模拟虚拟机械臂的指定运动。
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引用次数: 71
An intelligent vehicle tracking technology based on SURF feature and Mean-shift algorithm 基于SURF特征和Mean-shift算法的智能车辆跟踪技术
Pub Date : 2014-12-01 DOI: 10.1109/ROBIO.2014.7090500
Liu Yang, Wang Zhong-li, Cai Bai-gen
In traffic video surveillance system, target-level tracking and feature-level tracking are two important areas for research. Therefore, the combination between them is an interesting question. Mean-shift is a traditional target-level tracking algorithm with no adaptation to vehicle scale and orientation change. In order to solve the problem, algorithm combine SURF (speed-up robust feature) feature with Mean-shift algorithm is proposed in this article. Feature point scale and orientation information is used to make algorithm with scale and orientation adaptability. The tracking model of the vehicle is also updated in the algorithm. Experimental results show that the proposed algorithm provides better tracking result than traditional algorithm of vehicle scale and orientation change. Furthermore, the tracking result is also more accurate.
在交通视频监控系统中,目标级跟踪和特征级跟踪是两个重要的研究领域。因此,它们之间的结合是一个有趣的问题。Mean-shift是一种传统的目标级跟踪算法,不适应车辆尺度和方向的变化。为了解决这一问题,本文提出了将SURF(加速鲁棒特征)特征与Mean-shift算法相结合的算法。利用特征点尺度和方向信息,使算法具有尺度和方向的自适应性。该算法还对车辆的跟踪模型进行了更新。实验结果表明,该算法比传统的车辆尺度和方向变化跟踪算法具有更好的跟踪效果。此外,跟踪结果也更加准确。
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引用次数: 6
Saliency attention based abnormal event detection in video 基于显著性关注的视频异常事件检测
Pub Date : 2014-12-01 DOI: 10.1109/ROBIO.2014.7090469
Wang Huan, Huiwen Guo, Xinyu Wu
Most existing methods for abnormal event detection in the literature are relied on a training phase. Different from conventional approaches for abnormal event detection, a saliency attention based abnormal event detection approach is proposed in this paper. It is inspired by the visual attention mechanism that abnormal events are those which attract attention mostly in videos. The temporal and spatial abnormal saliency maps are firstly constructed and then the final abnormal event map is formatted by fusing them using a method with dynamic coefficients. The temporal abnormal saliency map is constructed by motion contrast between keypoints extracted from two successive video frames. The spatial abnormal saliency map is structured based on the color contrasts. Experiments performed on the benchmark datasets show that the proposed method achieves a high accurate and robust results for abnormal event detection without a training phase.
文献中大多数现有的异常事件检测方法都依赖于训练阶段。与传统的异常事件检测方法不同,本文提出了一种基于显著性注意的异常事件检测方法。受视觉注意机制的启发,异常事件是视频中最容易引起注意的事件。首先构造时空异常显著性图,然后采用动态系数法对它们进行融合,形成最终的异常事件图。通过对两个连续视频帧中提取的关键点进行运动对比,构建时间异常显著性图。基于颜色对比构建空间异常显著性图。在基准数据集上进行的实验表明,该方法在不需要训练阶段的情况下,对异常事件检测具有较高的准确性和鲁棒性。
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引用次数: 3
Development of a handbell-performance robot 手铃型机器人的研制
Pub Date : 2014-12-01 DOI: 10.1109/ROBIO.2014.7090587
Yosuke Nihei, H. Matsuda, Yuuichi Taduke, S. Kudoh, T. Suehiro
This paper describes the development of a handbell-playing robot system. The conditions under which the bells are rung are derived by an analysis of a physical model of a handbell. We designed the robot hardware based on these conditions. We also designed the mapping of the MIDI commands to the handbell-robot motions. Experiments performed verified that the robot system could play music according to MIDI scores.
本文介绍了一种手铃演奏机器人系统的研制。通过对手铃的物理模型的分析,推导出铃响的条件。基于这些条件,我们设计了机器人的硬件。我们还设计了MIDI命令到手铃机器人运动的映射。实验证明,该机器人系统可以根据MIDI乐谱播放音乐。
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引用次数: 1
Robot-mounted 500-fps 3-D shape measurement using motion-compensated coded structured light method 采用运动补偿编码结构光方法的机器人安装500 fps三维形状测量
Pub Date : 2014-12-01 DOI: 10.1109/ROBIO.2014.7090628
Jun Chen, Yongjiu Liu, Qingyi Gu, T. Aoyama, T. Takaki, I. Ishii
A high-frame-rate (HFR) structured light vision is developed for observing moving three-dimensional (3-D) scenes; it is mountable on the end of a robot manipulator for 3-D shape inspection. Our system can simultaneously obtain depth images of 512×512 pixels at 500 fps by implementing a motion-compensated coded structured light method on an HFR camera-projector platform; the 3-D computation is accelerated using the parallel processing on a GPU board. This method can remarkably reduce the synchronization errors in the structured-light-based measurement, which are encountered in the projection of multiple light patterns with different timings; such synchronization errors become larger as the ego-motion of a manipulator becomes larger. We demonstrate the performance of our system by showing several 3-D shape measurement results when the 3-D module is mounted on a fast-moving 6-DOF manipulator as a sensing head.
开发了一种用于观察运动三维场景的高帧率(HFR)结构光视觉;它安装在机器人机械手的末端,用于三维形状检测。该系统通过在HFR摄像机-投影仪平台上实现运动补偿编码结构光方法,以500 fps的速度同时获得512×512像素的深度图像;利用GPU板上的并行处理加速三维计算。该方法可以显著降低基于结构光的测量中不同时序的多光模式投影所产生的同步误差;随着机械手自运动的增大,同步误差也随之增大。当三维模块作为传感头安装在快速移动的六自由度机械臂上时,我们通过展示几个三维形状测量结果来展示我们系统的性能。
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引用次数: 2
Analysis and simulation of kinematics of 5-DOF nuclear power station robot manipulator 核电站五自由度机器人机械手运动学分析与仿真
Pub Date : 2014-12-01 DOI: 10.1109/ROBIO.2014.7090634
Chunchao Chen, Jinsong Li, Jun Luo, Shaorong Xie, Huayan Pu, Ze Cui, J. Gu
To analyze kinematic characteristics of the 5-DOF nuclear robot, the forward kinematics equations are established through Denavit-Hartenberg (D-H) method. The working space of robot is drawn out in Matlab according to Monte Carlo method and the inverse kinematic equations are established through the Paul's inverse transforms. In view of the missing solutions and redundant solutions that may appear in the process of solution for inverse kinematics equations, the paper describes different treatments. In order to test the kinematic model of manipulator, the test procedures are designed and there is a simulation for door-open planning based on the forward and inverse kinematics in a multibody dynamics simulation software Recurdyn to monitor the motion of the manipulator. The simulation experiments in this paper verify the rationality of motion algorithm and link design parameters, and provide a reliable basis for the study of dynamics, control and planning of robot.
为了分析五自由度核机器人的运动学特性,采用Denavit-Hartenberg (D-H)法建立了正运动学方程。根据蒙特卡罗方法在Matlab中绘制出机器人的工作空间,并通过保罗逆变换建立了机器人的运动学逆方程。针对反运动学方程在求解过程中可能出现的缺失解和冗余解,给出了不同的处理方法。为了对机械手的运动学模型进行测试,设计了测试程序,并在多体动力学仿真软件Recurdyn中进行了基于正运动学和逆运动学的开门规划仿真,对机械手的运动进行监控。本文的仿真实验验证了运动算法和连杆设计参数的合理性,为机器人动力学、控制和规划的研究提供了可靠的依据。
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引用次数: 6
An integrated forward collision warning system based on monocular vision 基于单目视觉的集成前向碰撞预警系统
Pub Date : 2014-12-01 DOI: 10.1109/ROBIO.2014.7090499
Yao Deng, Huawei Liang, Zhiling Wang, Junjie Huang
Driving assistance system has a significant influence on driving safety, and we introduce an integrated Forward Collision Warning (FCW) system based on monocular vision. In order to reduce the searching region of original image, lane making is presented to establish the ROI firstly. Secondly, hypotheses are extracted using Haar-like feature and Adaboost classifier. To remove false positive detection in the hypothesis verification process, we utilize SVM-based classifier with HOG feature lastly. Using Time-to-collision (TTC), possible collisions trigger the warning, and such Forward Collision Warning(FCW) system has been evaluated in dynamic environment. Experimental results show that the proposed system is robust and useful in practical applications.
驾驶辅助系统对驾驶安全有着重要的影响,本文介绍了一种基于单目视觉的综合前方碰撞预警系统。为了减小原始图像的搜索区域,首先提出了车道划分的方法来建立感兴趣区域。其次,利用Haar-like feature和Adaboost分类器提取假设。为了消除假设验证过程中的误报检测,最后利用基于svm的HOG特征分类器。采用碰撞时间(Time-to-collision, TTC),对可能发生的碰撞触发预警,并在动态环境下对前向碰撞预警系统进行了评估。实验结果表明,该系统具有良好的鲁棒性和实用性。
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引用次数: 4
Unfolded/tightened mechanism series support design based on characteristics of flying snake spine 基于飞蛇脊柱特点的展开/收紧机构系列支撑设计
Pub Date : 2014-12-01 DOI: 10.1109/ROBIO.2014.7090691
Zuhui Jiang, Baolin Feng, Shibiao Zhao, Zhongshan Zheng, Lu Li, Kexuan Li
This article proposes a new design of a 3D unfolded/tightened mechanism based on the spine structure of golden tree snake, which can realize torsion and bending. Inspired by golden tree snake vertebrae space deformation characteristics, analyzing the anatomy characteristics of the golden tree snake spine bone and muscle distribution characteristics, The bionic mechanism and drive unit can drive the 3D unfolded/tightened mechanism and meet the demand of unfolded/tightened mechanism pose and adjustment, compared with the traditional unfolded/tightened mechanism. In this paper, dynamics model of this robot established by Lagrange method is represented.
本文提出了一种基于金树蛇脊柱结构的三维展开/收紧机构的新设计,该机构可实现扭转和弯曲。受金树蛇脊椎骨空间变形特征的启发,分析了金树蛇脊椎骨的解剖特征和肌肉分布特征,与传统的展开/收紧机构相比,该仿生机构和驱动单元可以驱动三维展开/收紧机构,满足展开/收紧机构位姿和调整的需求。本文用拉格朗日方法建立了该机器人的动力学模型。
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引用次数: 1
期刊
2014 IEEE International Conference on Robotics and Biomimetics (ROBIO 2014)
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