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2015 6th International Conference on Automation, Robotics and Applications (ICARA)最新文献

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Spatial probability distribution for port planning in minimal invasive robotic surgery (MIRS) 微创机器人手术(MIRS)中港口规划的空间概率分布
Pub Date : 2015-02-01 DOI: 10.1109/ICARA.2015.7081148
Jessica Hutzl, H. Wörn
In minimal invasive robotic surgery (MIRS) port placement has a particular status accounted for joint limits of the robots. The port depicts a pivot point so that the robots movement is constraint by reducing its degrees of freedom (DOF). Additionally the workspace of reachable points is limited by the instrument length and the robots' flexibility. Our approach for optimizing the port position and evaluate the robots' performance uses a knowledge base, represented by trajectories, to generate a master trajectory of a specific operation type. Therefor a cluster algorithm is applied to establish a Markov model. To handle loops a second order Markov model is created as well. With the help of the each trajectory a transition matrix is build. By combining the most likely transitions of the clusters the chain is generated, giving a rough approximation of a master trajectory. A spatial probability distribution can be calculated for each point by discretization. Therefor, only the relevant clusters, respectively their points, are taken in account. This reflects the probability of a predicted direction by a specific point, which allows a more precise preparation of a master trajectory. After a workspace analysis of the robot it is possible to combine the knowledge of the robot's workspace and the trajectory of interest. By means of selected evaluation factors the robot's performance with a given pivot point is analyzed.
在微创机器人手术(MIRS)中,端口放置在机器人的关节限制中占有特殊地位。该端口描绘了一个枢轴点,从而通过降低其自由度(DOF)来约束机器人的运动。此外,可达点的工作空间受到仪器长度和机器人灵活性的限制。我们优化端口位置和评估机器人性能的方法使用了一个知识库,以轨迹表示,以生成特定操作类型的主轨迹。为此,采用聚类算法建立马尔可夫模型。为了处理循环,还创建了一个二阶马尔可夫模型。在每条轨迹的帮助下,建立了一个转移矩阵。通过组合簇的最可能的过渡,生成链,给出主轨迹的粗略近似值。通过离散化可以计算出每个点的空间概率分布。因此,只考虑相关的类,分别考虑它们的点。这反映了特定点预测方向的概率,从而可以更精确地准备主轨迹。在对机器人的工作空间进行分析之后,可以将机器人的工作空间知识与感兴趣的轨迹结合起来。通过选取评价因子,对给定轴心点下机器人的性能进行了分析。
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引用次数: 0
Immersive teleoperation of a robot arm using electro-tactile feedback 使用电触觉反馈的机器人手臂的沉浸式远程操作
Pub Date : 2015-02-01 DOI: 10.1109/ICARA.2015.7081164
D. Pamungkas, K. Ward
Teleoperation can allow an operator to control a robot remotely in inaccessible and hostile places. To achieve more dexterous control of a tele-operated robot some researchers are developing user interfaces equipped with vision and tactile feedback. 3D visual perception and tactile feedback can also assist the operator to feel immersed in the robot's environment and embodied within the robot to some extent. Most existing tactile feedback systems use electro-mechanical actuators and linkages. However, these systems are complex, cumbersome and consequently make it difficult for the operator feel embodied within the robot. To improve on these drawbacks, this paper introduces an immersive teleoperation system comprised of a 3D stereo vision head set combined with an electro-tactile feedback system. Our electro-tactile feedback system is compact, nonmechanical and versatile. Experimental results are provided which show how this form of immersive 3D perception and tactile feedback system can enable the user to achieve more dexterous control of a robot arm by enabling the operator to effectively see what robot sees and experience what the robot feels while performing work with the robot.
远程操作可以让操作员在难以接近和充满敌意的地方远程控制机器人。为了实现对遥控机器人的更灵巧的控制,一些研究人员正在开发配备视觉和触觉反馈的用户界面。3D视觉感知和触觉反馈也可以帮助操作者在一定程度上感受到沉浸在机器人的环境中,并在机器人内部得到体现。大多数现有的触觉反馈系统使用机电致动器和连杆。然而,这些系统是复杂的,笨重的,因此很难让操作员感受到融入机器人。为了改善这些缺点,本文介绍了一种由三维立体视觉头显和电触觉反馈系统组成的沉浸式远程操作系统。我们的电触觉反馈系统是紧凑的,非机械的和通用的。实验结果表明,这种形式的沉浸式3D感知和触觉反馈系统如何使用户能够有效地看到机器人所看到的并体验机器人在与机器人一起工作时的感觉,从而实现对机器人手臂的更灵巧的控制。
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引用次数: 18
Stability control for manipulator space capture by using Particle Swarm Optimization based on distributed controllable dampers 基于分布式可控阻尼器的粒子群优化机械臂空间捕获稳定性控制
Pub Date : 2015-02-01 DOI: 10.1109/ICARA.2015.7081211
Zhang Yi-chi, Chu Ming, Sun Han-xu, Dong Zheng-hong
The capture of space floating target tends to excite the oscillation of the manipulator's base. In this paper, a multi-dof manipulator with controllable damper in all the joints is proposed to realize the stability control for the base. Firstly, the general dynamical equations including the controllable damping matrix are established by using Kane method. Then, the Particle Swarm Optimization (PSO) is employed to calculate the optimal damping torques of all the dampers, which are used to consume the collision energy. The numerical experiments for a two-joint manipulator space capture with four-dof controllable dampers are researched to validate the effectiveness. The simulation results show that the proposed method can significantly reduce base attitude changes and vibration to ensure stabilization.
空间漂浮目标的捕获容易引起机械臂基座的振荡。本文提出了一种所有关节都具有可控阻尼器的多自由度机械臂,以实现对基座的稳定性控制。首先,利用凯恩法建立了含可控阻尼矩阵的一般动力学方程。然后,利用粒子群算法(PSO)计算各阻尼器的最优阻尼力矩,用于消耗碰撞能量;通过四自由度可控阻尼器双关节机械臂空间捕获的数值实验验证了该方法的有效性。仿真结果表明,该方法能有效地减小基座姿态变化和振动,保证系统的稳定性。
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引用次数: 1
A new motors fault tolerance control strategy to 4WID electric vehicle 一种新的四驱电动汽车电机容错控制策略
Pub Date : 2015-02-01 DOI: 10.1109/ICARA.2015.7081119
H. Qiu, Z. Qi
Four wheels independent driving (4WID) electric vehicle uses four motors. if some motors get faults, the whole vehicle would loss the stability to cause casualties. To solve the problem mentioned above, the fault tolerance control strategy of two motors of the 4WID electric vehicle running in straight line was studied and solved in this paper. The two-motor-fault modes were listed in all its aspects and the mathematic models of seven degrees of freedom were established. To achieve a good driving stability and dynamic characteristic with motors in failure state, the motors fault tolerance control strategies were proposed based on the performance of the 4WID electric vehicle and simulated by MATLAB/Simulink. The results show that the control strategies for torque re-allocation with motors in failure states can meet the designed demands, which provides a basis for the designing of whole vehicle's control strategy of the 4WID electric vehicle.
四轮独立驱动(4WID)电动汽车使用四个电机。如果部分电机出现故障,整车将失去稳定性,造成人员伤亡。针对上述问题,本文研究并解决了四驱车直线行驶双电机容错控制策略。列举了双电机故障的各个方面,并建立了七自由度的数学模型。为了在电机处于故障状态时获得良好的行驶稳定性和动态特性,根据四wid电动汽车的性能,提出了电机容错控制策略,并利用MATLAB/Simulink进行了仿真。结果表明,电机故障状态转矩重分配控制策略能够满足设计要求,为4WID电动汽车整车控制策略设计提供了依据。
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引用次数: 2
Towards automatic colour segmentation for robot soccer 机器人足球颜色自动分割的研究
Pub Date : 2015-02-01 DOI: 10.1109/ICARA.2015.7081195
D. Bailey, M. Contreras, G. S. Gupta
Tuning the colour thresholds within robot soccer is laborious, and sensitive to changes in illumination. An algorithm for automatic gain control and white balancing within the camera is described. This significantly reduces the effects of the variations in lighting on the thresholds. Next, a new colour space is proposed which maximises the hue separation of the different coloured regions to improve the colour discrimination. Finally several automatic segmentation techniques are briefly discussed. All of the algorithms are designed to operate on data directly streamed from the camera, enabling a low latency FPGA implementation.
在机器人足球中调整颜色阈值是很费力的,而且对照明的变化很敏感。介绍了一种相机内自动增益控制和白平衡的算法。这大大减少了光照变化对阈值的影响。其次,提出了一种新的色彩空间,最大限度地提高了不同颜色区域的色相分离,以提高色彩辨别能力。最后简要讨论了几种自动分割技术。所有的算法都设计为直接操作来自摄像机的数据流,从而实现低延迟的FPGA实现。
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引用次数: 4
Application of a commodity smartphone for fall detection 一种用于跌倒检测的商用智能手机的应用
Pub Date : 2015-02-01 DOI: 10.1109/ICARA.2015.7081198
T. Dinh, M. Chew
This paper presents a low-cost fall detection solution based on the use of a commodity smartphone. By collecting, processing and analyzing in real-time signals collected from the smartphone built-in sensors (tri-axis accelerometer and tri-axis gyroscope), the device is able to differentiate a genuine fall occurrence from routine motions of normal daily activities. This enables to generate an immediate alert to a caretaker (such as healthcare personnel, a family member or helper) if a monitored person falls.
本文提出了一种基于商用智能手机的低成本跌倒检测方案。通过收集、处理和分析从智能手机内置传感器(三轴加速度计和三轴陀螺仪)收集的实时信号,该设备能够将真正的跌倒事件与日常活动的常规动作区分开来。如果被监控人员摔倒,可以立即向看护人员(如医护人员、家庭成员或助手)发出警报。
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引用次数: 10
Design and implementation of a wireless sensor network for rose greenhouses monitoring 玫瑰大棚监测无线传感器网络的设计与实现
Pub Date : 2015-02-01 DOI: 10.1109/ICARA.2015.7081156
Mayra Erazo-Rodas, David Rivas, Milton Perez, Omar Galarza-Barrionuevo, Victor Bautista, Mónica Huerta, J. Rojo-álvarez
This work presents the design and implementation of a wireless sensor network, by using the ZIGBEE communication standard, for system monitoring on watering, climate control, and lighting on rose greenhouses. Our aim was to develop a remote and low-cost supervision system, for providing farmers in small and medium enterprises in the flower-growing sector with the possibility of continuous follow-up of greenhouses and immediate corrective actions on them, hence improving the productivity. Our results show that after three months of the network deployed and being operative on an Ecuadorian greenhouse, climate changes impact on the rose quality and diseases were dramatically reduced.
本文介绍了一个无线传感器网络的设计和实现,采用ZIGBEE通信标准,用于对玫瑰温室的浇水、气候控制和照明进行系统监控。我们的目标是开发一个远程和低成本的监督系统,为花卉种植部门的中小型企业的农民提供持续跟踪温室和立即纠正措施的可能性,从而提高生产力。我们的研究结果表明,经过三个月的网络部署和运行在厄瓜多尔温室,气候变化对玫瑰质量和疾病的影响大大减少。
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引用次数: 23
Decentralized formation control of quadcopters using feedback linearization 基于反馈线性化的四轴飞行器分散编队控制
Pub Date : 2015-02-01 DOI: 10.1109/ICARA.2015.7081205
A. Mahmood, Yoonsoo Kim
This paper proposes a decentralized formation control scheme for a group of quadcopters using feedback linearization. Unlike most of the existing works that involve a complex design of nonlinear formation control laws, this work simplifies the design to yield an almost linear control law for under-actuated nonlinear quadcopters. In fact, a singularity-free dynamic inversion scheme is utilized such that the quadcopter dynamics can be treated as a linear system. Consequently, a linear formation control law can be designed for the resulting linear system to achieve desired positions and an identical heading angle through local information exchanges only. Although the present work considers quadcopter dynamics only, the proposed methodology can also be directly applied to attitude synchronization problems arising in space and robotic applications.
提出了一种基于反馈线性化的四轴飞行器分散编队控制方案。与大多数涉及非线性编队控制律复杂设计的现有工作不同,这项工作简化了设计,为欠驱动非线性四轴飞行器提供了几乎线性的控制律。实际上,利用无奇点动态反演方案,使四轴飞行器动力学可以视为线性系统。因此,可以设计线性编队控制律,使线性系统仅通过局部信息交换即可获得期望位置和相同航向角。虽然目前的工作只考虑四轴飞行器动力学,但所提出的方法也可以直接应用于空间和机器人应用中出现的姿态同步问题。
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引用次数: 10
A view-based method for local homing of unmanned rotorcraft 一种基于视角的无人旋翼机局部寻的方法
Pub Date : 1900-01-01 DOI: 10.1109/ICARA.2015.7081189
Aymeric Denuelle, Saul Thurrowgood, F. Kendoul, M. Srinivasan
This paper describes a novel view-based method using panoramic images to perform local homing in outdoor environments. This holistic algorithm makes uses of difference images (in relation to a reference snapshot) to build an image reference frame centred at the home position. The currently experienced view at any local position is then projected onto this reference frame to determine the image coordinates and the homing vector. We present here results obtained in a simulated environment as well as from static outdoor tests. The biologically inspired algorithm described in this study is a feasible alternative to the local homing schemes that strongly rely on odometry or landmark extraction, making it therefore well suited for implementation onboard unmanned aerial vehicles.
本文提出了一种基于视角的方法,利用全景图像在室外环境中进行局部寻的。这种整体算法利用不同的图像(相对于参考快照)来建立一个以主位置为中心的图像参考框架。然后将当前在任何局部位置的经验视图投影到该参考框架上,以确定图像坐标和归巢向量。我们在这里给出了在模拟环境和静态室外测试中获得的结果。本研究中描述的受生物学启发的算法是强烈依赖里程计或地标提取的局部寻的方案的可行替代方案,因此非常适合在无人驾驶飞行器上实施。
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引用次数: 11
An efficient solution method for multibody systems with loops using multiple processors 多处理机环多体系统的一种有效求解方法
Pub Date : 1900-01-01 DOI: 10.1109/ICARA.2015.7081187
T. Ghosh, L. Nguyen, L. Quiocho
This paper describes a multibody dynamics algorithm formulated for parallel implementation on multiprocessor computing platforms using the divide-and-conquer approach. The system of interest is a general topology of rigid and elastic articulated bodies with or without loops. The algorithm divides the multibody system into a number of smaller sets of bodies in chain or tree structures, called “branches” at convenient joints called “connection points”, and uses an Order-N (O (N)) approach to formulate the dynamics of each branch in terms of the unknown spatial connection forces. The equations of motion for the branches, leaving the connection forces as unknowns, are implemented in separate processors in parallel for computational efficiency, and the equations for all the unknown connection forces are synthesized and solved in one or several processors. The performances of two implementations of this divide-and-conquer algorithm in multiple processors are compared with an existing method implemented on a single processor.
本文描述了一种采用分治法在多处理器计算平台上并行实现的多体动力学算法。感兴趣的系统是有或没有环的刚性和弹性铰接体的一般拓扑结构。该算法将多体系统分成若干个更小的链状或树形结构的体集,在方便的连接点处称为“连接点”,称为“分支”,并使用Order-N (O (N))方法根据未知的空间连接力来制定每个分支的动力学。为了提高计算效率,分支的运动方程在单独的处理器上并行实现,而连接力为未知,所有未知连接力的方程在一个或多个处理器上合成和求解。将该分治算法在多处理器上的两种实现与单处理器上实现的现有方法的性能进行了比较。
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引用次数: 0
期刊
2015 6th International Conference on Automation, Robotics and Applications (ICARA)
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