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2010 IEEE/SICE International Symposium on System Integration最新文献

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Depth computation using optical flow and least squares 利用光流和最小二乘进行深度计算
Pub Date : 2010-12-20 DOI: 10.1109/SII.2010.5708293
S. Diamantas, Anastasios Oikonomidis, R. Crowder
Depth computation in robotics is an important step towards providing robust and accurate navigation capabilities to a mobile robot. In this paper we examine the problem of depth estimation with the view to be used in parsimonious systems where fast and accurate measurements are critical. For this purpose we have combined two methods, namely optical flow and least squares in order to infer depth estimates between a robot and a landmark. In the optical flow method the variation of the optical flow vector at varying distances and velocities is observed. In the least squares method snapshots of a landmark are taken from different robot positions. The results of the two methods show that there is a significant increase in depth estimation accuracy by combining optical flow and least squares.
机器人技术中的深度计算是为移动机器人提供鲁棒和精确导航能力的重要一步。在本文中,我们研究了深度估计问题的观点,以用于在快速和准确的测量是至关重要的简约系统。为此,我们结合了两种方法,即光流和最小二乘法,以推断机器人和地标之间的深度估计。在光流法中,观察了光流矢量在不同距离和速度下的变化。在最小二乘法中,从不同的机器人位置获取地标的快照。结果表明,将光流与最小二乘相结合可以显著提高深度估计精度。
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引用次数: 6
Integrated experimental environment for orbital robotic systems, using ground-based and free-floating manipulators 轨道机器人系统的综合实验环境,使用地面和自由浮动操纵器
Pub Date : 2010-12-01 DOI: 10.1109/SII.2010.5708310
N. Uyama, H. Lund, Koki Asakimori, Yuki Ikeda, Daichi Hirano, H. Nakanishi, Kazuya Yoshida
On-ground experiment for space robotic system is essential to validate constructed robotic system prior to launch. This paper presents an integrated on-ground experimental environment for orbital robotic system. The experimental environment utilizes an air-floating testbed to realize two-dimensional micro-gravity environment on ground. As manipulation system, the constructed environment adopts a ground-based manipulator and a free-floating robot. In order to verify the emulated micro-gravity environment, two cases are tested: the impulse-momentum relationship between a ground-based manipulator and a free-floating target, and the conservation of momentum in a free-floating robot. Both results conclude the validity of the constructed experimental environment for on-ground micro-gravity emulation.
空间机器人系统的地面试验是对空间机器人系统进行发射前验证的重要环节。提出了轨道机器人系统的地面综合实验环境。实验环境采用气浮试验台实现二维地面微重力环境。作为操作系统,所构建的环境采用地面机械手和自由漂浮机器人。为了验证仿真的微重力环境,测试了两种情况:地面机械臂与自由漂浮目标之间的冲量-动量关系,以及自由漂浮机器人的动量守恒。结果表明,所构建的地面微重力仿真实验环境是有效的。
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引用次数: 9
Vision-based localization using active scope camera — Accuracy evaluation for structure from motion in disaster environment 基于视觉的主动瞄准镜相机定位——灾害环境中运动结构的精度评价
Pub Date : 2010-12-01 DOI: 10.1109/SII.2010.5708296
Michihisa Ishikura, E. Takeuchi, M. Konyo, S. Tadokoro
This paper presents the evaluation results for conventional methods that can be used for vision-based localization. An Active Scope Camera is a very thin snake robot and can be used as a rescue robot for search and rescue missions. Self-position estimation of the Active Scope Camera is important for efficient search. Nevertheless, using sensors for this purpose hinders the movement and maneuvering of the camera through narrow gaps, because sensors are very big and heavy for the Active Scope Camera. Vision-based localization using a fish-eye camera is suitable technique for self-position estimation. However, the images obtained using the Active Scope Camera are not of good quality. The material of objects found in disaster environments and overexposure by light-emitting diodes embedded at the camera tip affects the matching of feature points. In this paper, properties of images of disaster sites obtained using the Active Scope Camera and the accuracy evaluation of vision-based localization are described.
本文给出了用于视觉定位的传统方法的评价结果。主动范围相机是一个非常薄的蛇形机器人,可以作为一个救援机器人用于搜索和救援任务。主动瞄准镜相机的自定位对有效搜索具有重要意义。然而,为了这个目的而使用传感器阻碍了相机通过狭窄间隙的运动和机动,因为传感器对于主动瞄准镜相机来说非常大而且很重。基于视觉的鱼眼相机定位是一种适合于自定位的技术。然而,使用主动瞄准镜相机获得的图像质量不是很好。在灾难环境中发现的物体的材料以及嵌入在相机尖端的发光二极管的过度曝光都会影响特征点的匹配。本文介绍了利用主动瞄准镜相机获取的灾害现场图像的特性和基于视觉的定位精度评价。
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引用次数: 4
Rhythmic components of spatio-temporally decorrelated EEG signals based Common Spatial Pattern 基于共同空间模式的时空去相关脑电图信号的节奏成分
Pub Date : 2010-12-01 DOI: 10.1109/SII.2010.5708348
M. Mukul, F. Matsuno
This paper addresses the performance of Common Spatial Pattern (CSP) on rhythmic band information selected from temporally decorrelated signals by zero-phase FIR digital filter. The standard blind source separation (BSS) method is applied to the EOG corrected EEG signals to make the EOG corrected EEG signals temporally decorrelated. This work considers the standard CSP with IEEE-1057 signal reconstruction algorithm for extraction of rhythmic information from the EOG corrected EEG signals too. The selected rhythmic band information is further processed by the CSP method for the feature extraction. The performance of the proposed method has been evaluated by BCI performance evaluation parameters: classification accuracy (ACC) and Cohen's Kappa co-efficient (k).
本文研究了用零相位FIR数字滤波器对从时间去相关信号中选择的节奏带信息进行共空间方向图处理的性能。将标准盲源分离(BSS)方法应用于EOG校正后的脑电信号,使EOG校正后的脑电信号在时间上去相关。本文也考虑了基于IEEE-1057信号重构算法的标准CSP从经EOG校正的脑电信号中提取节奏信息。选择的节奏带信息通过CSP方法进一步处理进行特征提取。采用BCI性能评价参数:分类精度(classification accuracy, ACC)和Cohen’s Kappa co-efficient (Cohen’s Kappa co-efficient, k)对所提方法的性能进行了评价。
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引用次数: 2
Dynamics simulation of a neuromuscular model of ankle clonus for neurophysiological education by a leg-shaped haptic simulator 腿形触觉模拟器对踝关节阵挛神经肌肉模型的动态仿真及神经生理教育
Pub Date : 2010-12-01 DOI: 10.1109/SII.2010.5708347
T. Kikuchi, K. Oda
We have proposed a leg-shaped haptic simulator (Leg-Robot) that provides an environment for young physical therapist to learn rehabilitation techniques or diagnosis techniques with haptic information which mimics a real patient with abnormal motor function, for example, stroke or spinal cord injury. In previous studies, we also proposed a control method to develop a clonus-like movement for the Leg-Robot. However, it was a completely engineered approach and does not reflect neurological knowledge of the disability sufficiently. In order to enhance profitability of the Leg-Robot as an educational system to learn neurophysiological mechanism of abnormal activities of disabled patients, we newly developed neurologically knowledge-based control method to simulate and control a clonus-like movement of the Leg-Robot. In this paper, dynamic simulation with Open Dynamics Engine (ODE) of a proposed clonus model is mainly discussed.
我们提出了一种腿部形状的触觉模拟器(Leg-Robot),它为年轻的物理治疗师提供了一个学习康复技术或诊断技术的环境,它模拟了一个真实的运动功能异常的病人,例如中风或脊髓损伤。在之前的研究中,我们也提出了一种控制方法来开发腿部机器人的类似clonus的运动。然而,这是一种完全工程化的方法,不能充分反映残疾的神经学知识。为了提高腿部机器人作为学习残疾患者异常活动的神经生理机制的教育系统的盈利能力,我们开发了基于神经学知识的控制方法来模拟和控制腿部机器人的clonous运动。本文主要讨论了用开放动力学引擎(ODE)对所提出的一种冠状体模型进行动态仿真。
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引用次数: 1
Realization and analysis of giant-swing motion using Q-Learning 基于Q-Learning的巨摆运动的实现与分析
Pub Date : 2010-12-01 DOI: 10.1109/SII.2010.5708353
Nozomi Toyoda, T. Yokoyama, Naoki Sakai, T. Yabuta
Many research papers have reported studies on sports robots that realize giant-swing motion. However, almost all these robots were controlled using trajectory planning methods, and few robots realized giant-swing motion by learning. Consequently, in this study, we attempted to construct a humanoid robot that realizes giant-swing motion by Q-learning, a reinforcement learning technique. The significant aspect of our study is that few robotic models were constructed beforehand; the robot learns giant-swing motion only by interaction with the environment during simulations. Our implementation faced several problems such as imperfect perception of the velocity state and robot posture issues caused by using only the arm angle. However, our real robot realized giant-swing motion by averaging the Q value and by using rewards — the absolute angle of the foot angle and the angular velocity of the arm angle-in the simulated learning data; the sampling time was 250 ms. Furthermore, the feasibility of generalization of learning for realizing selective motion in the forward and backward rotational directions was investigated; it was revealed that the generalization of learning is feasible as long as it does not interfere with the robot's motions.
许多研究论文报道了实现大摆动运动的运动机器人的研究。然而,这些机器人几乎都是用轨迹规划方法控制的,很少有机器人通过学习实现大摆运动。因此,在本研究中,我们试图通过Q-learning(一种强化学习技术)构建一个实现巨大摆动运动的类人机器人。我们研究的重要方面是,事先构建的机器人模型很少;在模拟过程中,机器人仅通过与环境的相互作用来学习巨大的摆动运动。我们的实现面临着几个问题,如速度状态的不完美感知和机器人姿势问题,导致仅使用手臂角度。而真实机器人通过对Q值取平均值,并在模拟学习数据中使用足角的绝对角度和臂角的角速度作为奖励来实现巨摆运动;采样时间为250ms。在此基础上,进一步研究了学习泛化实现机器人前后旋转方向选择性运动的可行性;结果表明,在不干扰机器人运动的前提下,学习泛化是可行的。
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引用次数: 4
Perceptual properties of vibrotactile material texture: Effects of amplitude changes and stimuli beneath detection thresholds 振动触觉材料纹理的感知特性:振幅变化和低于检测阈值的刺激的影响
Pub Date : 2010-12-01 DOI: 10.1109/SII.2010.5708356
S. Okamoto, Yoji Yamada
We investigate the perceptual properties of vibro-tactile material textures: in particular, the effects of changes in vibrotactile amplitudes and of vibratory stimuli that are beneath detection thresholds. Existing knowledge of the perceptual properties of vibrotactile gratings does not hold for vibrotactile material textures because material textures are composed of many more frequency components than those of grating textures. We experimentally investigate perceptual properties of wood and sandpaper textures through lossy data compression of the textures. Lossy data compression is suitable for manipulating many independent variables of material textures while maintaining their qualities. By quantization of vibratory amplitudes, we find that subjective quality of textures does not change until the number of quantization steps reaches 12. This represents that data sizes of material textures are reduced by up to approximately 75% while maintaining their qualities. By cutting off the frequency components whose amplitudes are beneath the shifted-threshold curve, we find that even subliminal stimuli affect perception. Developers of vibro-tactile material textures should be aware of these perceptual properties.
我们研究了振动触觉材料纹理的感知特性:特别是振动触觉振幅的变化和低于检测阈值的振动刺激的影响。现有的振动触觉光栅的感知特性知识并不适用于振动触觉材料纹理,因为材料纹理比光栅纹理由更多的频率成分组成。我们通过实验研究木材和砂纸纹理的感知特性,通过纹理的有损数据压缩。有损数据压缩适用于处理材料纹理的许多独立变量,同时保持其质量。通过对振动幅度的量化,我们发现在量化步骤达到12步之前,纹理的主观质量不会发生变化。这表示材料纹理的数据大小减少了大约75%,同时保持了它们的质量。通过切断其振幅低于阈值偏移曲线的频率成分,我们发现即使是阈下刺激也会影响感知。振动触觉材料纹理的开发人员应该意识到这些感知特性。
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引用次数: 22
Orchard traveling UGV using particle filter based localization and inverse optimal control 基于粒子滤波的果园行走UGV定位与逆最优控制
Pub Date : 2010-12-01 DOI: 10.1109/SII.2010.5708297
K. Kurashiki, T. Fukao, Kenji Ishiyama, Tsuyoshi Kamiya, N. Murakami
The authors previously proposed an Unmanned Ground Vehicle (UGV) in an orchard as a base platform for autonomous robot systems for performing tasks such as monitoring, pesticide spraying, and harvesting. To control a UGV in a semi-natural environment, accurate self-localization and a control law that is robust under large disturbances from rough terrain are the first priorities. In this paper, a self-localization algorithm consisting of a 2D laser range finder and the particle filter is proposed. A robust nonlinear control law and a path regeneration algorithm that the authors proposed for underactuated mobile robots are combined with the localization method and applied to a drive-by-wire experimental vehicle. Excellent experimental results were obtained for traveling through a real orchard. The standard deviation of the control error in the lateral direction was less than 15cm.
作者之前提出了一种果园中的无人地面车辆(UGV),作为自主机器人系统的基础平台,用于执行监控、农药喷洒和收获等任务。要在半自然环境下控制UGV,首先要考虑精确的自定位和在粗糙地形的大干扰下具有鲁棒性的控制律。本文提出了一种由二维激光测距仪和粒子滤波组成的自定位算法。将作者提出的针对欠驱动移动机器人的鲁棒非线性控制律和路径再生算法与定位方法相结合,并应用于线控实验车上。在一个真实的果园中旅行,获得了很好的实验结果。横向控制误差的标准差小于15cm。
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引用次数: 22
Real-time prediction of fall and collision of tracked vehicle for remote-control support 用于遥控保障的履带车辆坠落碰撞实时预测
Pub Date : 2010-12-01 DOI: 10.1109/SII.2010.5708298
Ken Sakurada, Shihoko Suzuki, K. Ohno, E. Takeuchi, S. Tadokoro, Akihiko Hata, Naoki Miyahara, K. Higashi
This thesis describes a new method that in real time predicts fall and collision in order to support remote control of a tracked vehicle with sub-tracks. A tracked vehicle has high ability of getting over rough terrain. However, it is difficult for an operator at a remote place to control the vehicle's moving direction and speed. Hence, we propose a new path evaluation system based on the measurement of environmental shapes around the vehicle. In this system, the candidate paths are generated by operator inputs and terrain information. For evaluating the traversability of the path, we estimate the pose of the robot on the path and contact points with the ground. Then, the combination of translational and rotational velocity is chosen.
本文提出了一种实时预测跌落和碰撞的新方法,以支持具有子履带的履带车辆的远程控制。履带式车辆通过崎岖地形的能力很强。然而,远程操作人员很难控制车辆的移动方向和速度。因此,我们提出了一种新的基于车辆周围环境形状测量的路径评估系统。在该系统中,候选路径由操作员输入和地形信息生成。为了评估路径的可遍历性,我们估计了机器人在路径上的姿态和与地面的接触点。然后,选择平移速度和旋转速度的组合。
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引用次数: 2
Manipulation of an irregularly shaped object by two mobile robots 由两个移动机器人对不规则形状物体的操作
Pub Date : 2010-12-01 DOI: 10.1109/SII.2010.5708328
Zhaojia Liu, Hiromasa Kamogawa, J. Ota
Fast transition from a stable initial state to a stable handling state is important when multiple mobile robots manipulate and transport a heavy and bulky object. In this paper, a cooperative system consisting of two mobile robots was designed to realize fast transition. A gripper robot grasps and lifts an object from one side to provide enough space for a lifter robot to lift the object. Fast transition can be formulated as an optimization problem. We propose an algorithm to realize fast transition based on the cooperative system designed. The experimental results illustrate the validity of the proposed method.
当多个移动机器人操作和搬运一个笨重的物体时,从稳定的初始状态快速过渡到稳定的搬运状态是非常重要的。本文设计了一个由两个移动机器人组成的协作系统,以实现快速过渡。抓取机器人从物体的一侧抓取并提起物体,为抓取机器人提供足够的空间来提起物体。快速过渡可以表述为一个优化问题。提出了一种基于设计的协作系统实现快速转移的算法。实验结果表明了该方法的有效性。
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引用次数: 6
期刊
2010 IEEE/SICE International Symposium on System Integration
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