Ver información de revista ResumenThis paper presents the development of the robotic multi-agent system SMART. In this system, the agent concept is applied to both hardware and software entities. Hardware agents are robots, with three and four legs, and an IP-camera that takes images of the scene where the cooperative task is carried out. Hardware agents strongly cooperate with software agents.These latter agents can be classified into image processing, communications, task management and decision making, planning and trajectory generation agents. To model, control and evaluate the performance of cooperative tasks among agents, a kind of Petri Net, called Work-Flow Petri Net, is used. Experimental results shows the good performance of the system. A cooperative multi-agent robotics system: Design and modelling Cecilia Garcia Cena , Pedro F. Cardenas , Roque Saltaren Pazmino , Lisandro Puglisi Rafael Aracil Santonja ABSTRACT This paper presents the development of the robotic multi-agent system SMART. In this system, the agent concept is applied to both hardware and software entities. Hardware agents are robots, with three and four legs, and an IP-camera that takes images of the scene where the cooperative task is carried out. Hardware agents strongly cooperate with software agents. These latter agents can be classified into image processing, communications, task management and decision making, planning and trajectory generation agents. To model, control and evaluate the performance of cooperative tasks among agents, a kind of Petri Net, called Work-Flow Petri Net, is used. Experimental results shows the good performance of the system.

In this work, the dimensional synthesis of a spherical Parallel Manipulator (PM) with a 3PSU-IS kinematic chain is presented. The goal of the synthesis is to find a set of parameters that defines the PM with the best performance in terms of workspace capabilities, dexterity and isotropy. The PM is parametrized in terms of a reference element, and a non-directed search of these parameters is carried out. First, the inverse kinematics and instantaneous kinematics of the mechanism are presented. The latter is found using the screw theory formulation. An algorithm that explores a bounded set of parameters and determines the corresponding value of global indexes is presented. The concepts of a novel global performance index and a compound index are introduced. Simulation results are shown and discussed. The best PMs found in terms of each performance index evaluated are locally analyzed in terms of its workspace and local dexterity. The relationship between the performance of the PM and its parameters is discussed, and a prototype with the best performance in terms of the compound index is presented and analyzed.

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Los robots submarinos han revolucionado la exploración del fondo marino. Por otro lado, estos robots han permitido realizar operaciones en aguas profundas sin la necesidad de enviar un vehículo tripulado por humanos. El futuro de esta tecnología es prometedor. El propósito de este documento es servir de primer contacto con este tema y va dirigido a estudiantes de postgrado, ingenieros e investigadores con interés en la robótica submarina. Además, se reporta el estado actual de los diferentes aspectos que giran alrededor de estaárea de la robótica.

(a) 3-leg walking robot (RobotSL).(b) 4-leg walking robot (Robot4L).

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