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Proceedings of the First Euromicro Workshop on Advanced Mobile Robots (EUROBOT '96)最新文献

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Route learning in mobile robots through self-organisation 基于自组织的移动机器人路径学习
Pub Date : 1996-10-09 DOI: 10.1109/EURBOT.1996.551891
C. Owen, U. Nehmzow
This paper describes route-learning experiments with an autonomous mobile robot in which map building is achieved through a process of unsupervised clustering of sensory data. The resulting topological mapping of the robot's perceptual space is used for subsequent navigation tasks such as route following. After the autonomous mapbuilding process is completed, the acquired generalised perceptions are associated with motor actions, enabling the robot to follow routes autonomously. The navigation system has been tested extensively on a Nomad 200 mobile robot, it is reliable and copes with noise and variation inherent in the environment. One important aspect of the map building and route following system described here is that relevance or irrelevance of perceptual features is determined autonomously by the robot, not through predefinition by the designer. Secondly, the presented route learning system enables the robot to use the map for association of perception with action, rather than localisation alone.
本文描述了一个自主移动机器人的路径学习实验,其中地图的构建是通过对感官数据的无监督聚类过程来实现的。机器人感知空间的拓扑映射用于后续的导航任务,如路线跟踪。在自主地图构建过程完成后,获得的广义感知与运动动作相关联,使机器人能够自主地遵循路线。该导航系统已经在Nomad 200移动机器人上进行了广泛的测试,它是可靠的,可以应对环境中固有的噪音和变化。这里描述的地图构建和路线跟踪系统的一个重要方面是,感知特征的相关性或不相关性是由机器人自主决定的,而不是通过设计师的预先定义。其次,所提出的路径学习系统使机器人能够使用地图将感知与行动联系起来,而不仅仅是定位。
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引用次数: 28
Fuzzy logic rules for mapping sensor data to robot control 将传感器数据映射到机器人控制的模糊逻辑规则
Pub Date : 1996-10-09 DOI: 10.1109/EURBOT.1996.551878
Jianwei Zhang, F. Wille, A. Knoll
We use fuzzy logic rules to directly map sensor data to robot control outputs by classifying a set of typical subtasks, such as "path tracking", "local collision avoidance", "contour tracking", "situation evaluation", etc. With the help of existing heuristics, the decision-making process for each subtask can be modelled and represented with "IF-THEN" rules. The underlying concepts of mapping with fuzzy logic rules are briefly explained by considering the proximity sensors, the control of speed and steering angle of a mobile robot. The development of these fuzzy rules is explained, typical rules for dealing with various motion situations are listed. The modularly developed fuzzy rule bases can be integrated to realise task-level programming and the exploration task. Experiments with the mobile robot validate this concept.
我们通过分类一组典型的子任务,如“路径跟踪”、“局部避碰”、“轮廓跟踪”、“态势评估”等,利用模糊逻辑规则将传感器数据直接映射到机器人控制输出。利用现有的启发式方法,对每个子任务的决策过程进行建模,并用“IF-THEN”规则表示。通过考虑移动机器人的接近传感器、速度控制和转向角控制,简要解释了模糊逻辑规则映射的基本概念。阐述了这些模糊规则的发展,列举了处理各种运动情况的典型规则。模块化开发的模糊规则库可以集成在一起,实现任务级规划和探索任务。移动机器人的实验验证了这一概念。
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引用次数: 12
Landmark-based autonomous navigation in sewerage pipes 污水管道中基于地标的自主导航
Pub Date : 1996-10-09 DOI: 10.1109/EURBOT.1996.551883
Joachim Hertzberg, Frank Kirchner
We describe a method for an autonomous mobile robot to navigate through a system of sewerage pipes. Landmarks signalling positions in the pipe system have to be detected and classified, where classification is allowed do be unreliable. Self localization is interpreted as a partially observable Markov decision problem and solved accordingly. The method is implemented and used on a prototype robot platform operating in a dry sewage pipe test network.
我们描述了一种自主移动机器人在污水管道系统中导航的方法。必须对管道系统中的地标信号位置进行检测和分类,在允许分类的情况下,分类确实不可靠。将自定位问题解释为部分可观测马尔可夫决策问题,并进行求解。该方法已在干式污水管道试验网络的原型机器人平台上实现并应用。
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引用次数: 91
Ultrasonic sensing and fuzzy logic control for navigation in unknown static environments 未知静态环境下导航的超声传感与模糊逻辑控制
Pub Date : 1996-10-09 DOI: 10.1109/EURBOT.1996.551881
A. Ramirez-Serrano, M. Boumédine
In this study a fuzzy logic navigation controller has been designed in order to deal with the uncertainty and ambiguity of the information the system (mobile robot) receives. The technique has been applied to MOBIRO, an experimental mobile robot using a set of seven ultrasonic sensors to perceive its surroundings. The fuzzy control designed maps the input space (information coming from ultrasonic sensors) to a safe collision avoidance trajectory (output Space). This is accomplished by an inference process based on rules (list of IF-THEN statements) taken from a common sense knowledge base. The technique generates satisfactory real time movements of the autonomous vehicle to reach its goal safely. Simulation and experimental results show that the method can be satisfactory used by mobile robots moving on unknown static terrains.
针对移动机器人接收信息的不确定性和模糊性,设计了一种模糊逻辑导航控制器。这项技术已被应用于MOBIRO,这是一个实验性的移动机器人,它使用一组7个超声波传感器来感知周围环境。所设计的模糊控制将输入空间(来自超声波传感器的信息)映射到安全避碰轨迹(输出空间)。这是通过基于从常识知识库中获取的规则(IF-THEN语句列表)的推理过程来完成的。该技术产生令人满意的自动驾驶汽车实时运动,以安全到达目标。仿真和实验结果表明,该方法可用于在未知静态地形上移动的移动机器人。
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引用次数: 10
Visual tracking and target selection for mobile robots 移动机器人的视觉跟踪与目标选择
Pub Date : 1996-10-09 DOI: 10.1109/EURBOT.1996.551896
C. Balkenius, L. Kopp
This paper describes how tracking and target selection are used in two behavior systems of the XT-1 vision architecture for mobile robots. The first system is concerned with active tracking of moving targets and the second is used for visually controlled spatial navigation. We overview the XT-1 architecture and describe the role of expectation-based template matching for both target tracking and navigation. The subsystems for low-level processing, attentional processing, single feature processing, spatial relations, and place/object-recognition are described and we present a number of behaviors that can make use of the different visual processing stages. The architecture, which is inspired by biology, has been successfully implemented in a number of robots which are also briefly described.
本文描述了在移动机器人的XT-1视觉体系结构的两个行为系统中如何使用跟踪和目标选择。第一个系统涉及运动目标的主动跟踪,第二个系统用于视觉控制的空间导航。我们概述了XT-1体系结构,并描述了基于期望的模板匹配在目标跟踪和导航中的作用。描述了用于低级处理、注意处理、单一特征处理、空间关系和地点/物体识别的子系统,并提出了一些可以利用不同视觉处理阶段的行为。该结构受到生物学的启发,已经成功地应用于许多机器人中,并对其进行了简要描述。
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引用次数: 26
Robot self-localization by means of vision 基于视觉的机器人自定位
Pub Date : 1996-10-09 DOI: 10.1109/EURBOT.1996.551895
G. Adorni, G. Destri, M. Mordonini, F. Zanichelli
We present an application of vision-based object recognition capabilities to the self-positioning-problem of an autonomous robot. Alphanumeric signs are placed in the robot environment as position markers and perceived through an on-board CCD camera on a pan-tilt head. Sign recognition is performed by a neural network based system, driven by some a-priori knowledge about the characteristics of the objects used as markers (signs). When given a map of the location of markers, the robot is able to estimate its position from the information extracted through perceived images. Marker distances and angular displacements allow the computation of a position uncertainty region for the mobile robot. Even using common, human readable markers, localization is performed with an average position accuracy within a few centimeters.
我们提出了一种基于视觉的物体识别能力在自主机器人自我定位问题中的应用。字母数字标志被放置在机器人环境中作为位置标记,并通过机载CCD摄像头在一个泛倾斜的头上感知。符号识别是由一个基于神经网络的系统执行的,由一些关于用作标记(符号)的物体特征的先验知识驱动。当给定标记位置的地图时,机器人能够从通过感知图像提取的信息中估计其位置。标记距离和角位移允许计算移动机器人的位置不确定性区域。即使使用普通的、人类可读的标记,定位的平均位置精度也在几厘米以内。
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引用次数: 16
Six-legged robot for service operations 用于服务操作的六足机器人
Pub Date : 1996-10-09 DOI: 10.1109/EURBOT.1996.551892
Schmucker U, Schneider A, Ihme T
New results on the development of an adaptive six-legged hexagonal walking robot and its control system are presented. The major part of the paper considers control of foot force distribution and control of body motion based on the information about force foot reactions and the information about the main force vector acting on the robot's body. Inserting and drilling operations based on the force control are considered.
介绍了自适应六足六边形步行机器人及其控制系统的研究进展。论文的主要部分考虑了基于力足反作用力信息和作用在机器人身体上的主力矢量信息的足部力分布控制和身体运动控制。考虑了基于力控制的插入和钻井作业。
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引用次数: 12
Towards adaptive perception in autonomous robots using second-order recurrent networks 基于二阶循环网络的自主机器人自适应感知研究
Pub Date : 1996-10-09 DOI: 10.1109/EURBOT.1996.551887
T. Ziemke
In this paper a higher-order recurrent connectionist architecture is used for learning adaptive behaviour in an autonomous robot. This architecture consists of two sub-networks in a master-slave relationship: a function network for the coupling between sensory inputs and motor outputs, and a context network, which dynamically adapts the sensory input weights in order to allow a flexible, context-dependent mapping from percepts to actions. The capabilities of this architecture are demonstrated in a number of action selection experiments with a simulated Khepera robot, and it is argued that the general approach of generically dividing the overall control task between sequentially cascaded context and function learning offers a powerful mechanism for autonomous long- and short-term adaptation of behaviour.
本文采用一种高阶递归连接主义结构来学习自主机器人的自适应行为。该架构由主从关系的两个子网络组成:一个是用于感官输入和运动输出之间耦合的函数网络,另一个是上下文网络,它动态地调整感官输入权重,以便允许从感知到动作的灵活的、依赖于上下文的映射。该架构的功能在模拟Khepera机器人的许多动作选择实验中得到了证明,并且认为将整体控制任务在顺序级联上下文和功能学习之间进行一般划分的一般方法为自主的长期和短期行为适应提供了强大的机制。
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引用次数: 19
First results in eliminating crosstalk and noise by applying pseudo-random sequences to mobile robot sonar sensing 首先,将伪随机序列应用于移动机器人声纳传感中,消除了串扰和噪声
Pub Date : 1996-10-09 DOI: 10.1109/EURBOT.1996.551879
K.-W. Jorg, M. Berg
Crosstalk is one of the most severe problems in conventional mobile robot sonar sensing. This paper addresses the crosstalk-problem and presents first and promising results of a new approach which enables a mobile robot to fire its sonar sensors simultaneously while totally eliminating any misreading caused by crosstalk or external ultrasound sources. This is achieved by carefully designing the emitted burst, i.e. by using appropriate pseudo-random sequences together with a matched filter technique. Experimental results are presented.
串扰是传统移动机器人声呐传感中最严重的问题之一。本文解决了串扰问题,并提出了一种新方法的初步和有希望的结果,该方法使移动机器人能够同时发射声纳传感器,同时完全消除由串扰或外部超声源引起的任何误读。这是通过仔细设计发射的突发来实现的,即通过使用适当的伪随机序列和匹配的滤波技术。给出了实验结果。
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引用次数: 20
Statistical approach to range-data fusion and interpretation 距离数据融合与解释的统计方法
Pub Date : 1996-10-09 DOI: 10.1109/EURBOT.1996.551876
P. Štěpán, L. Preucil
Making-use of multiple sensors is crucial for improvement of mobile robot navigation performance. The contribution introduces a problem of integrating noisy range-data by data fusion on signal/pixel level. This is performed for multiple sensors and different sensor positions into a common description of the environment. The paper deals with grid models, which are used as a low-level representations of sonar range measurements as well as for data fusion process. A short overview of used methods for the grid representation is shown and different fusion methods for various sonar models are discussed. Special attention is paid to the influence of sonar modeling on robustness of data integration process. The paper deals with methods for improvement of fusion robustness. Novelty of the presented approach stands in a sonar model which is designed as dependent on measured distance. The other improvement is an optimal feature selection for doorway recognition. The designed methods are illustrated by examples and test runs on experimental mobile platform with sonar sensory system.
多传感器的使用是提高移动机器人导航性能的关键。该贡献引入了在信号/像素级上通过数据融合对噪声距离数据进行积分的问题。这是执行多个传感器和不同的传感器位置到一个共同的环境描述。本文讨论了网格模型,该模型用于声纳距离测量的低级表示和数据融合处理。简要概述了网格表示的常用方法,并讨论了不同声纳模型的不同融合方法。重点研究了声呐建模对数据集成过程鲁棒性的影响。本文讨论了提高融合鲁棒性的方法。该方法的新颖之处在于声纳模型的设计依赖于测量距离。另一个改进是门口识别的最优特征选择。通过实例和在声纳传感实验移动平台上的运行情况说明了所设计的方法。
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引用次数: 4
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Proceedings of the First Euromicro Workshop on Advanced Mobile Robots (EUROBOT '96)
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