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2012 IEEE/RSJ International Conference on Intelligent Robots and Systems最新文献

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Modeling and control of cylindrical mobile robot 圆柱形移动机器人的建模与控制
Pub Date : 2012-12-24 DOI: 10.1109/IROS.2012.6386124
T. Hirano, M. Ishikawa, K. Osuka
Cylinders exhibits characteristic dynamic behavior such as rolling with lateral-side or edges. In this paper, we propose a new type of rolling mobile robot with cylindrical aspect, which performs two contrastive modes of motion due to the geometry of its shape. In the first mode called lateral-side rolling, the robot is statically stable except few degree of freedom, whereas the robot is only dynamically stable in the other mode (called edge-rolling) and has potential of high mobility. In this work, we attempt to control this robot using an eccentric rotor without gyroscope and applying linear or nonlinear control theory.
圆柱体表现出典型的动态行为,如与侧面或边缘滚动。本文提出了一种新型的圆柱形滚动移动机器人,由于其形状的几何特性,它具有两种不同的运动模式。在第一种模式下,机器人除了几个自由度外是静态稳定的,而在另一种模式下,机器人仅是动态稳定的,并且具有高机动性的潜力。在这项工作中,我们尝试使用不带陀螺仪的偏心转子,并应用线性或非线性控制理论来控制该机器人。
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引用次数: 0
Comparative study of two 3D reconstruction methods for underwater archaeology 水下考古两种三维重建方法的比较研究
Pub Date : 2012-12-24 DOI: 10.1109/IROS.2012.6385711
A. Meline, J. Triboulet, B. Jouvencel
The underwater 3D reconstruction cartography has made great progress in the last decade. The work presented in this paper is about the analysis and 3D reconstruction of archeological objects. Using a calibrated single camera and an uncalibrated system, we propose to describe a method to perform the Euclidian 3D reconstruction of unknown objects. A comparison of two methods is presented and tested on synthetic and real underwater pictures. Filters are proposed to simulate underwater environment and inherent problems. Finally, robust and stable features have been extracted from underwater pictures and used to perform the 3D model.
水下三维重建制图在近十年来取得了很大的进展。本文介绍的工作是关于考古对象的分析和三维重建。本文提出了一种利用标定单相机和未标定系统对未知物体进行欧几里得三维重建的方法。对两种方法进行了比较,并在合成图像和真实水下图像上进行了测试。为了模拟水下环境和固有问题,提出了滤波器。最后,从水下图像中提取鲁棒稳定特征,并用于三维建模。
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引用次数: 22
Orienting deformable polygonal parts without sensors 定向没有传感器的可变形多边形部件
Pub Date : 2012-12-24 DOI: 10.1109/IROS.2012.6386165
Shawn M. Kristek, Dylan A. Shell
Sensorless part orienting has proven useful in manufacturing and automation, while the manipulation of deformable objects is an area of growing interest. Existing sensorless orienting techniques may produce forces which have the potential to damage deformable parts. We present an algorithm that, when provided a geometric description of the part and a deformation model, generates a plan to orient the part up to symmetry from any initial orientation. The solution exploits deformation of the object under certain configurations to help resolve ambiguity. The approach has several attractive features: (1) the resulting plan is a short sequence of such actions guaranteed to succeed for all initial configurations; (2) the algorithm operates even with a very simple model of deformation, but is extensible when specialized knowledge is available; (3) failure to find a feasible solution has precise semantics (e.g., inadequate manipulator precision). We validate the algorithm experimentally with a pair of low-precision robot manipulators, orienting 6 parts made of 4 types of materials, with the correct orientation being reached on 80% of the 192 trials. Careful analysis of the failures emphasizes the importance of low-friction conditions, that increased manipulator precision would be beneficial but is not necessary, and a simple deformation model can suffice. In addition to illustrating the feasibility of sensorless manipulation of deformable parts, we note that the algorithm has applications to manipulation of non-deformable parts without the pressure switch sensor employed in existing sensorless orienting strategies.
无传感器零件定向已被证明在制造和自动化中是有用的,而可变形物体的操纵是一个越来越感兴趣的领域。现有的无传感器定向技术可能产生有可能损坏可变形部件的力。我们提出了一种算法,当提供零件的几何描述和变形模型时,生成一个计划,使零件从任何初始方向定向到对称。该解决方案利用对象在某些配置下的变形来帮助解决歧义。该方法有几个吸引人的特点:(1)结果计划是保证所有初始配置都成功的此类动作的短序列;(2)该算法即使在非常简单的变形模型下也能运行,但在有专业知识的情况下,该算法是可扩展的;(3)未能找到可行的解决方案具有精确的语义(例如,机械手精度不足)。我们用一对低精度机器人机械手对4种材料制成的6个零件进行了定向实验,验证了算法的正确性,在192次试验中,定向正确率达到80%。对故障的仔细分析强调了低摩擦条件的重要性,提高机械手精度是有益的,但不是必要的,一个简单的变形模型就足够了。除了说明无传感器操纵可变形零件的可行性外,我们还注意到该算法可应用于在现有无传感器定向策略中不使用压力开关传感器的情况下操纵非变形零件。
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引用次数: 21
Kinematic calibration of manipulator using single laser pointer 单激光笔机械手运动学标定
Pub Date : 2012-12-24 DOI: 10.1109/IROS.2012.6385531
Jwusheng Hu, Jyun-Ji Wang, Yung-Jung Chang
This paper proposes a robot kinematic calibration system including a laser pointer installed on the manipulator, a stationary camera, and a planar surface. The laser pointer beams to the surface, and the camera observes the projected laser spot. The position of the laser spot is computed according to the geometrical relationships of line-plane intersection. The laser spot position is sensitive to slight difference of the end-effector pose due to the extensibility of laser beam. Inaccurate kinematic parameters cause inaccurate calculation of the end-effector pose, and then the laser spot position by the forward estimation is deviated from the one by camera observation. For calibrating the robot kinematics, the optimal solution of kinematic parameters is obtained by minimizing the laser spot position difference between the forward estimation and camera measurement via the nonlinear optimization method. The proposed kinematic calibration system is cost-efficient and flexible for any manipulator. The proposed method is validated by simulation and experiment.
提出了一种机器人运动学标定系统,该系统包括安装在机械手上的激光笔、固定摄像机和一个平面。激光指针指向表面,相机观察投射的激光光斑。根据线面相交的几何关系计算激光光斑的位置。由于激光束的延展性,激光光斑位置对末端执行器位姿的微小变化非常敏感。由于运动学参数不准确,导致末端执行器位姿计算不准确,进而导致正演估计得到的激光光斑位置与摄像机观测得到的光斑位置存在偏差。为了标定机器人的运动学,采用非线性优化方法,使正演估计与相机测量的激光光斑位置差最小,从而得到运动学参数的最优解。所提出的运动学标定系统对任何机械手都具有成本效益和灵活性。仿真和实验验证了该方法的有效性。
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引用次数: 6
Robust descriptors for 3D point clouds using Geometric and Photometric Local Feature 使用几何和光度局部特征的三维点云鲁棒描述符
Pub Date : 2012-12-24 DOI: 10.1109/IROS.2012.6385920
Hyoseok Hwang, S. Hyung, Sukjune Yoon, K. Roh
The robust perception of robots is strongly needed to handle various objects skillfully. In this paper, we propose a novel approach to recognize objects and estimate their 6-DOF pose using 3D feature descriptors, called Geometric and Photometric Local Feature (GPLF). The proposed descriptors use both the geometric and photometric information of 3D point clouds from RGB-D camera and integrate those information into efficient descriptors. GPLF shows robust discriminative performance regardless of characteristics such as shapes or appearances of objects in cluttered scenes. The experimental results show how well the proposed approach classifies and identify objects. The performance of pose estimation is robust and stable enough for the robot to manipulate objects. We also compare the proposed approach with previous approaches that use partial information of objects with a representative large-scale RGB-D object dataset.
为了熟练地处理各种物体,机器人强烈需要具有鲁棒感知能力。在本文中,我们提出了一种使用三维特征描述符来识别物体并估计其六自由度姿态的新方法,称为几何和光度局部特征(GPLF)。该描述符利用RGB-D相机的三维点云的几何和光度信息,并将这些信息整合到有效的描述符中。在混乱的场景中,无论物体的形状或外观等特征如何,GPLF都表现出鲁棒的判别性能。实验结果表明,该方法对目标的分类和识别效果良好。姿态估计的鲁棒性和稳定性足以满足机器人对目标的操纵。我们还将所提出的方法与之前使用具有代表性的大规模RGB-D对象数据集的对象部分信息的方法进行了比较。
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引用次数: 11
Collision avoidance of industrial robot arms using an invisible sensitive skin 用不可见的敏感皮肤避免工业机械臂的碰撞
Pub Date : 2012-12-24 DOI: 10.1109/IROS.2012.6386294
Tin Lun Lam, H. Yip, Huihuan Qian, Yangsheng Xu
Collision avoidance of industrial robot arms in varying environment is a challenging task which has been a tough problem for decades. It often requires a large number of sensors and high computational power. Moreover, since the sensors are often mounted on the surface of robot arms, they may affect the appearance of the robot arms and may be vulnerable to damage. This video presents a cost-effective invisible sensitive skin that can cover a large area without utilizing a large number of sensors and it is built inside the robot arm. By using only 5 contactless capacitive sensors and specially designed antennas, collision avoidance of a 6-DOF industrial robot arm is attained.
工业机械臂在不同环境下的避碰是一个具有挑战性的课题,几十年来一直是一个难题。它通常需要大量的传感器和高计算能力。此外,由于传感器通常安装在机器人手臂的表面,它们可能会影响机器人手臂的外观,并且可能容易损坏。这段视频展示了一种具有成本效益的隐形敏感皮肤,它可以覆盖大面积,而不需要使用大量的传感器,它被内置在机器人手臂内。通过仅使用5个非接触式电容传感器和特殊设计的天线,实现了六自由度工业机械臂的避碰。
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引用次数: 24
Parallel stiffness in a bounding quadruped with flexible spine 具有灵活脊柱的跳跃四足动物的平行刚度
Pub Date : 2012-12-24 DOI: 10.1109/IROS.2012.6385870
G. A. Folkertsma, Sangbae Kim, S. Stramigioli
Legged locomotion involves periodic negative and positive work, which usually results in high power consumption. Improvement of the energy efficiency is possible by using energy storage elements to reversibly store the negative work performed during a walking or running cycle. While series elastics with high impedance (high gear ratio) actuators are widely used, we investigate the application of parallel stiffness with highly backdriveable actuators. We specifically show that the use of parallel springs in a bounding quadruped with a flexible spine can lower power consumption by over 50%.
腿部运动涉及周期性的负功和正功,这通常会导致高功率消耗。通过使用能量存储元件可逆地存储在步行或跑步周期中执行的负功,可以提高能源效率。在高阻抗(高传动比)串联弹性作动器被广泛应用的同时,我们研究了并联刚度与高反驱动作动器的应用。我们特别表明,在具有灵活脊柱的跳跃四足动物中使用平行弹簧可以降低50%以上的功耗。
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引用次数: 81
Seamless aiding of inertial-slam using Visual Directional Constraints from a monocular vision 基于单目视觉方向约束的惯性碰撞无缝辅助
Pub Date : 2012-12-24 DOI: 10.1109/IROS.2012.6385830
U. Qayyum, Jonghyuk Kim
Inertial-SLAM has been actively studied as it can provide all-terrain navigational capability with full six degrees-of-freedom information to autonomous robots. With the recent availability of low-cost inertial and vision sensors, a light-weight and accurate mapping system could be achieved for many robotic tasks such as land/aerial explorations. The key challenge toward this is in the availability of reliable and constant aiding information to correct the inertial system which is intrinsically unstable. The existing approaches have been relying on feature-based maps, which require accurate depth-resolution process to correct the inertial units properly where the aiding rate is highly dependent on the map density. In this work we propose to directly integrate the visual odometry to the inertial system by fusing the scale ambiguous translation vectors as Visual Directional Constraints (VDC) on vehicle motion at high update rates, while the 3D map being still used to constrain the longitudinal drifts but in a relaxed way. In this way, the visual odometry information can be seamlessly fused to inertial system by resolving the scale ambiguity problem between inertial and monocular camera thus achieving a reliable and constant aiding. The proposed approach is evaluated on SLAM benchmark dataset and simulated environment, showing a more stable and consistent performance of monocular inertial-SLAM.
惯性slam可以为自主机器人提供全六自由度信息的全地形导航能力,因此受到了人们的积极研究。随着最近低成本惯性和视觉传感器的可用性,轻量级和精确的测绘系统可以实现许多机器人任务,如陆地/空中勘探。实现这一目标的关键挑战是如何获得可靠和持续的辅助信息来纠正固有不稳定的惯性系统。现有的方法一直依赖于基于特征的地图,这需要精确的深度分辨率过程来正确地校正惯性单元,其中辅助速率高度依赖于地图密度。在这项工作中,我们提出通过融合尺度模糊平移向量作为车辆运动的视觉方向约束(VDC),以高更新率将视觉里程计直接集成到惯性系统中,而3D地图仍然用于约束纵向漂移,但以一种宽松的方式。通过解决惯性相机与单目相机之间的尺度模糊问题,将视觉里程计信息无缝融合到惯性系统中,从而实现可靠、持续的辅助。在SLAM基准数据集和仿真环境上对该方法进行了评估,结果表明该方法具有更加稳定和一致的单目惯性SLAM性能。
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引用次数: 6
A rate-position haptic controller for large telemanipulation workspaces 一种用于大型遥控工作空间的速率位置触觉控制器
Pub Date : 2012-12-24 DOI: 10.1109/IROS.2012.6385633
Jorge Barrio, Fráncisco Suarez-Ruiz, M. Ferre, R. Aracil
This paper presents a new Haptic Rate-Position controller, which allows manipulating a slave robot in a large workspace. Haptic information is displayed to the user so as to be informed when a change in the operation mode occurs. This controller allows performing tasks in a large remote workspace by using a haptic device with a reduced workspace such as Phantom. Experimental results have been carried out using a virtual slave robot, simulated with Open Dynamics Engine (ODE). A real IFMIF (International Fusion Materials Irradiation Facility) remote handling task has been simulated. Its goal is to carry out remote manipulation of test irradiated materials in a nuclear environment. The proposed algorithm has been compared with the classic Position controller in a Pick & Place manipulation and has shown much better levels of effectiveness.
本文提出了一种新型的触觉速率-位置控制器,可以在大工作空间内对从机器人进行控制。将触觉信息显示给用户,以便在操作模式发生变化时通知用户。该控制器允许在大型远程工作空间中执行任务,通过使用具有减少工作空间的触觉设备,如Phantom。利用虚拟从机器人进行了实验,并用开放动力学引擎(ODE)进行了仿真。模拟了一个真实的IFMIF(国际聚变材料辐照设施)远程处理任务。其目标是在核环境中对试验辐照材料进行远程操作。所提出的算法已与经典的位置控制器在拾取和放置操作中进行了比较,并显示出更好的有效性水平。
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引用次数: 9
A new Kinect-based guidance mode for upper limb robot-aided neurorehabilitation 一种新的基于kinect的上肢机器人辅助神经康复引导模式
Pub Date : 2012-12-24 DOI: 10.1109/IROS.2012.6386097
C. Loconsole, F. Banno, A. Frisoli, M. Bergamasco
During typical robot-assisted training sessions, patients are required to execute tasks with the assistance of a robot while receiving feedback on a 2D display. Three-dimensional tasks of this sort require the adoption of stereoscopy to achieve correct visuo-motor-proprioceptive alignment. Stereoscopy often causes side-effects as sickness and tiredness, and it may affect the processes of recovery and cortical reorganization of the patients' brain in an unclear way. It follows that it is preferrable for a robot-assisted neurorehabilitation therapy to work in a real 3D setup containing real objects rather than using virtual reality. In this paper, we propose a new system for robot-assisted neurorehabilitation scenarios which allows patients to execute therapy by manipulating real, generic 3D objects. The proposed system is based on a new algorithm for identification and tracking of generic objects which makes efficient use of a Microsoft Kinect sensor. We discuss the results of several experiments conducted in order to test robustness, accuracy and speed of the tracking algorithm and the feasibility of the integrated system.
在典型的机器人辅助训练课程中,患者需要在机器人的帮助下执行任务,同时接收2D显示器上的反馈。这种类型的三维任务需要采用立体视觉来实现正确的视觉-运动-本体感觉对齐。立体视术常引起恶心和疲劳等副作用,并可能以不明确的方式影响患者大脑的恢复和皮层重组过程。因此,机器人辅助的神经康复治疗最好在包含真实物体的真实3D环境中工作,而不是使用虚拟现实。在本文中,我们提出了一个机器人辅助神经康复场景的新系统,该系统允许患者通过操纵真实的、通用的3D物体来执行治疗。该系统基于一种新的识别和跟踪通用物体的算法,该算法有效地利用了微软Kinect传感器。为了测试跟踪算法的鲁棒性、准确性和速度以及集成系统的可行性,我们讨论了几个实验的结果。
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引用次数: 23
期刊
2012 IEEE/RSJ International Conference on Intelligent Robots and Systems
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