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2017 IEEE International Conference on Robotics and Biomimetics (ROBIO)最新文献

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On statistical analysis for shepherd guidance system 牧童引导系统的统计分析
Pub Date : 2017-12-01 DOI: 10.1109/ROBIO.2017.8324588
Y. Tsunoda, Yuichiro Sueoka, K. Osuka
This paper is concerned with group navigation which utilizes strong interaction between two types of mobile agents, what we call sheepdog agent (dog agent) and sheep agent. Natural sheepdog system exhibits that one or a small number of sheepdog guides large population of sheep, up to a thousand, to a pre-determined goal position thanks to the characteristics of the sheep; they live in a flock and they hate a dog. From the viewpoint of multi-robots navigation, the sheepdog system will help us to grasp some key tricks for control strategies; sufficient and minimum number of controllers will manipulate many degree of freedoms. After deriving mathematical models of sheep flocks and a shepherd dog, we propose to conduct a statistical approach for understanding the navigation mechanism; we mainly focus on the interaction factor, flocking effect, and the dog performance. Firstly, we dare to run repeated simulations by adding statistical errors in the interaction vector between sheep flocks and the dog. Secondly, we examine the navigation performance by changing the flock characteristics: the size of individual attraction/alignment zone. Finally, we analyze the relation between the speed of dog and the sheepdog-like navigation performance.
本文研究的群体导航是利用两种移动代理之间的强交互作用,我们称之为牧羊犬代理(dog agent)和绵羊代理。自然牧羊犬系统表现为一只或少数牧羊犬凭借羊的特性引导大群羊(最多一千只)到达预定的目标位置;他们群居,他们讨厌狗。从多机器人导航的角度来看,牧羊犬系统将帮助我们掌握控制策略的一些关键技巧;足够和最少数量的控制器将操纵许多自由度。在推导出羊群和牧羊犬的数学模型后,我们提出用统计方法来理解导航机制;我们主要关注交互因素、羊群效应和狗的表现。首先,我们敢于在羊群与狗的交互向量中加入统计误差进行重复模拟。其次,我们通过改变群体特征(个体吸引/对齐区域的大小)来检查导航性能。最后,我们分析了狗的速度与类牧羊犬导航性能的关系。
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引用次数: 8
Continuous reinforcement learning from human demonstrations with integrated experience replay for autonomous driving 从人类演示中持续强化学习,集成自动驾驶经验回放
Pub Date : 2017-12-01 DOI: 10.1109/ROBIO.2017.8324787
Sixiang Zuo, Zhiyang Wang, Xiaorui Zhu, Y. Ou
As a promising subfield of machine learning, Reinforcement Learning (RL) has drawn increasing attention among the academia as well as the public. However, the practical application of RL is still restricted by a variety of reasons. The two most significant challenges of RL are the large exploration domain and the difficulty to converge. Integrating RL with human expertise is technically an interesting way to accelerate the exploration and increase the stability. In this work, we propose a continuous reinforcement learning method which integrates Deep Deterministic Policy Gradient (DDPG) with human demonstrations. The proposed method uses a combined loss function for updating the actor and critic networks. In addition, the experience replay buffer is also drawn from different transition data samples to make the learning more stable. The proposed method is tested with a popular RL task, i.e. the autonomous driving, by simulations with TORCS environment. Experimental results not only show the effectiveness of our method in improving the learning stability, but also manifest the potential capability of our method in mastering human preferences.
强化学习(Reinforcement learning, RL)作为机器学习的一个极具发展前景的分支领域,越来越受到学术界和公众的关注。然而,RL的实际应用仍然受到各种原因的制约。RL面临的两个最大挑战是大的勘探域和难以收敛。将强化学习与人类专业知识相结合,在技术上是一种加速探索和增加稳定性的有趣方法。在这项工作中,我们提出了一种将深度确定性策略梯度(DDPG)与人类演示相结合的连续强化学习方法。提出的方法使用组合损失函数来更新演员和评论家网络。此外,还从不同的过渡数据样本中提取经验回放缓冲区,使学习更加稳定。通过在TORCS环境下的仿真,对该方法进行了测试。实验结果不仅表明了我们的方法在提高学习稳定性方面的有效性,而且表明了我们的方法在掌握人类偏好方面的潜在能力。
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引用次数: 16
An application of a generalized architecture to an autonomous underwater vehicle 广义结构在自主水下航行器中的应用
Pub Date : 2017-12-01 DOI: 10.1109/ROBIO.2017.8324405
Changlong Lin, Guoliang Zhang, Jing Li, Yan Chen, Yiwen Zhang, Yiping Li
A common feature of unmanned vehicles is their complexity, which grows apace and provides its own challenges. Frameworks for managing this growing complexity have always been one of the key aspects of designing an unmanned vehicle. In our previous work, a generalized architecture is proposed to not only address the complexity in developing an unmanned vehicle, but also support the algorithm exchange and technology transfer for integrating efforts from different researchers. In this paper, we applied this architecture to the control system of a practical vehicle. In the development of the control system, object oriented method is adopted and the specialization process of element classes from abstract to detail is presented. Then standards for the architecture is discussed. Finally, field experiments are carried out to validate the effectiveness of this architecture.
无人驾驶车辆的一个共同特点是它们的复杂性,这种复杂性发展迅速,并带来了自己的挑战。管理这种日益增长的复杂性的框架一直是设计无人驾驶车辆的关键方面之一。在我们之前的工作中,我们提出了一个通用的架构,不仅解决了开发无人驾驶车辆的复杂性,而且还支持算法交换和技术转让,以整合不同研究人员的努力。在本文中,我们将这种体系结构应用到实际车辆的控制系统中。在控制系统的开发中,采用了面向对象的方法,给出了元素类从抽象到细节的专门化过程。然后讨论了体系结构的标准。最后进行了现场实验,验证了该体系结构的有效性。
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引用次数: 0
Imitating humans: Humanoid gait design based on energy exchange 仿人:基于能量交换的仿人步态设计
Pub Date : 2017-12-01 DOI: 10.1109/ROBIO.2017.8324811
Noel Maalouf, I. Elhajj, Elie A. Shammas, Daniel C. Asmar
This paper proposes a novel technique for designing humanoid gaits, inspired from human walking characteristics, in which roughly seventy percent of the required energy during walking is attributed to the exchange of kinetic and potential energies. We test our system by creating an energy-conscious gait for a Hoap2 simulated robot in Webots, and validate that with this gait energy exchange occurs as per our design. Finally, we analyze the energy expenditure for the Hoap2 during walking and compare it to that of human walking.
本文提出了一种设计仿人步态的新技术,该技术受人类行走特性的启发,其中行走过程中所需能量的大约70%归因于动能和势能的交换。我们通过在Webots中为Hoap2模拟机器人创建能量意识步态来测试我们的系统,并验证这种步态的能量交换按照我们的设计发生。最后,我们分析了Hoap2在步行过程中的能量消耗,并将其与人类步行进行了比较。
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引用次数: 0
Learning to detect slip for stable grasping 学习检测滑动以稳定抓握
Pub Date : 2017-12-01 DOI: 10.1109/ROBIO.2017.8324455
Luxuan Li, F. Sun, Bin Fang, Zhudong Huang, Chao Yang, Mingxuan Jing
As an important basis of stable grasping, slip detection plays a critical role on improving the operation level of robots. In this paper, a novel slip detection method that combines unsupervised learning and supervised learning is proposed. The window matching pursuit is used to extract features and then the SVM is applied to classify the slip and stable events. Superior to other methods, the proposed method has no restriction of grasped object and can be easily applied to other robot hands. In addition, a novel slip-tagging method based on infrared sensor that measures relative distance of object and robot hand is proposed. The platform consisting of Universal Robot, Barrett hand and the infrared sensor is setup. And experiments are implemented to prove effectiveness of the proposed methods.
滑移检测作为稳定抓取的重要基础,对提高机器人的操作水平起着至关重要的作用。本文提出了一种将无监督学习与监督学习相结合的滑动检测方法。首先利用窗口匹配跟踪提取特征,然后利用支持向量机对滑动事件和稳定事件进行分类。与其他方法相比,该方法不受抓取对象的限制,可以很容易地应用于其他机械手。此外,提出了一种基于红外传感器测量物体与机械手相对距离的滑动标记方法。搭建了由万能机器人、巴雷特机械手和红外传感器组成的平台。并通过实验验证了所提方法的有效性。
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引用次数: 9
A coordination control for a wearable walking-assist robot 一种可穿戴行走辅助机器人的协调控制
Pub Date : 2017-12-01 DOI: 10.1109/ROBIO.2017.8324654
Xia Zhang, Tianhong Luo, Atsushi Tsukahara, M. Hashimoto
The biologically-inspired motion control theory was introduced to ameliorate human-robot interaction flexibility and multi-joint autonomy in walking assist. A new type of human-robot interaction (HRI)-based coordination control method which combined a hip CPG (central pattern generator) control, a knee hierarchical impedance control and a hip-knee linkage control was explored. Firstly, the characteristics of CPGs self-oscillation and external communication were utilized to obtain the ideal master/slave hip joint trajectories, and CPG-units symmetrical inhibition were established to maintain anti-phase of the left and right hip joints. Secondly, according to the requirements of gait, a high and low hierarchical impedance control law was designed, and thus the knee joint torques during support stage and swing stage were obtained respectively. Finally, a hip-knee joints linkage mechanism was built to incorporate the hip joint CPG control with the knee-joint impedance control, and thus natural and relevant hip-knee joints trajectory was realized. The stability of the HRI-based coordination control method was researched by using Lyapunov stability theory. Walking experiments were carried out to certificate that the proposed control method was effective in generating nature hip-knee joints trajectory in walking.
引入仿生运动控制理论,改善行走辅助中人机交互的灵活性和多关节自主性。提出了一种基于人机交互(HRI)的协调控制方法,该方法将髋关节中央模式发生器(CPG)控制、膝关节层次阻抗控制和髋关节-膝关节联动控制相结合。首先,利用cpg自振荡和外部通信的特性,获得理想的主从髋关节运动轨迹,建立cpg单元对称抑制,维持左右髋关节的反相位;其次,根据步态要求,设计了高低层次阻抗控制律,分别获得了支撑阶段和摆动阶段的膝关节扭矩;最后,建立了将髋关节CPG控制与膝关节阻抗控制相结合的髋关节-膝关节联动机构,实现了髋关节运动轨迹的自然相关。利用李雅普诺夫稳定性理论研究了基于hri的协调控制方法的稳定性。行走实验表明,所提出的控制方法能够有效地生成行走中自然的髋关节轨迹。
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引用次数: 0
Development of a tendon-driven mechanism with liquid circulation system for improving wear resistance 用于提高耐磨性的带液体循环系统的肌腱驱动机构的研制
Pub Date : 2017-12-01 DOI: 10.1109/ROBIO.2017.8324658
Shouta Miyake, Shunsuke Nagahama, S. Sugano
Tendon-driven mechanisms have many advantages and researchers expect to apply these mechanisms across various fields. Conversely, tendon-driven mechanisms have some disadvantages such as difficulty of control and unsuitability for extended use applications due to the impact of wire wear on wire tension. Therefore, these mechanisms have issues in applications such as industrial and nursing robotics, which require precise movement over long time periods. In this study, we developed a new mechanism wherein wire wear resistance is high because of the use of liquid lubrication and the incorporation of an impurity removal process. This is similar to how the tendon-driven mechanisms in humans operate. In our experiment, we produced the proposed mechanism and evaluated the quantity of bending and stretching operations that could be achieved before wire breakage occurs. The results showed an improvement in wear resistance over conventional mechanisms.
肌腱驱动机制具有许多优点,研究人员希望将这些机制应用于各个领域。相反,由于钢丝磨损对钢丝张力的影响,肌腱驱动机构存在一些缺点,如难以控制和不适合扩展使用。因此,这些机制在工业和护理机器人等应用中存在问题,这些应用需要长时间的精确运动。在这项研究中,我们开发了一种新的机制,其中电线的耐磨性很高,因为使用了液体润滑和杂质去除过程的结合。这类似于人类肌腱驱动机制的运作方式。在我们的实验中,我们产生了提出的机制,并评估了在钢丝断裂之前可以实现的弯曲和拉伸操作的数量。结果表明,与传统机构相比,该机构的耐磨性有所提高。
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引用次数: 1
Distributed control of a robotic network for protection of a region from intruders 机器人网络的分布式控制,以保护一个区域免受入侵者的侵害
Pub Date : 2017-12-01 DOI: 10.1109/ROBIO.2017.8324516
A. Savkin, A. Marzoughi
This paper addresses a problem of intruder interception on the boundary of a protected region through the use of a network of mobile robots. A necessary and sufficient condition for the existence of a solution of this problem is obtained. We propose a decentralized motion control algorithm for the mobile robots to intercept an intruder entering the protected region. The algorithm is developed based on some simple rules that are computationally efficient and easily implementable in real time.
本文通过使用移动机器人网络解决了在保护区域边界上的入侵者拦截问题。得到了该问题解存在的充分必要条件。提出了一种分散运动控制算法,用于拦截进入保护区域的入侵者。该算法是基于一些简单的规则开发的,计算效率高,易于实时实现。
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引用次数: 8
Hexapod robot kinematics modeling and tripod gait design based on the foot end trajectory 基于足端轨迹的六足机器人运动学建模及三脚架步态设计
Pub Date : 2017-12-01 DOI: 10.1109/ROBIO.2017.8324813
Jianbo Sun, J. Ren, Yinglian Jin, Binrui Wang, Dijian Chen
Hexapod robots have strong crawling abilities and complex gaits. Referring the configuration of ants, a hexapod robot is designed. Based on the DH parameters and the homogeneous transformation matrix, the direct and inverse kinematic models are built, and the workspace of the foot end is analyzed. For the tripod gait, the relationship between the rotation angle of the leg with respect to body and the foot movement is built. The foot end trajectories of the swing phase are designed by adopting sine and cosine functions, the stance phase by horizontal straight line function. The angle joint trajectories are obtained by evaluating the inverse kinematic equations. Finally, the tripod gaits, including straight, transvers and swivel gaits, are designed. The experimental results illustrate the effectiveness of the robot gait planning algorithms. The design method in this paper is easy to understand and calculate.
六足机器人爬行能力强,步态复杂。参照蚂蚁的构型,设计了六足机器人。基于DH参数和齐次变换矩阵,建立了正运动学和逆运动学模型,分析了足端工作空间。对于三脚架步态,建立了腿部相对于身体的旋转角度与足部运动之间的关系。摆动阶段脚端轨迹采用正弦余弦函数设计,站立阶段采用水平直线函数设计。通过求解运动学逆方程得到角关节运动轨迹。最后,对三脚架步态进行了设计,包括直、横、转三种步态。实验结果验证了机器人步态规划算法的有效性。本文的设计方法易于理解和计算。
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引用次数: 10
A method for collision free navigation of non-holonomic 3D robots in unknown tunnel like environments 非完整三维机器人在未知类隧道环境中的无碰撞导航方法
Pub Date : 2017-12-01 DOI: 10.1109/ROBIO.2017.8324537
A. Savkin, Chao Wang
A non-holonomic 3D robot or autonomous vehicle with a bounded control input travels in a complex unknown tunnel like 3D environment. We propose a 3D navigation strategy to move through a tunnel while keeping a safe distance from the tunnel wall. A mathematically rigorous analysis of the proposed 3D robot navigation algorithm is given. Computer simulation results confirm the applicability and performance of the proposed navigation approach. The navigation law can be applied to both underwater autonomous vehicles and unmanned aerial vehicles.
具有有限控制输入的非完整三维机器人或自动驾驶汽车在复杂的未知隧道中行驶。我们提出了一种3D导航策略,在隧道中移动的同时保持与隧道壁的安全距离。对所提出的三维机器人导航算法进行了严密的数学分析。计算机仿真结果验证了所提导航方法的适用性和性能。该导航法适用于水下自主航行器和无人驾驶飞行器。
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引用次数: 4
期刊
2017 IEEE International Conference on Robotics and Biomimetics (ROBIO)
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