Browsing by Author "Larrañaga, Josu"
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Item Hardware in the loop module to calculate production indicators(2012) Puerto, Mildred J.; Larrañaga, Josu; Doll, Ulrich; Sallé, Damien; FACTORY; ROBOTICA_AUTOMA; ROBOTICA_FLEXCurrently Hardware in the Loop (HIL) is a powerful tool in manufacturing planning. A HIL module for manufacturing must include the dynamics of a critical machine, the logical control signals and the production sequence information. By this way Hardware in the Loop can provide a complete set of possible cycletimes, due the module capability to change delays times, sizes of the workpieces and problems in the parts or in the logic states. All this information could be re-used for manufacturers to improve factory designs or by other management modules to improve production indicators under the Virtual Factory Framework European project framework. Due to the level of detailed dynamics required in Hardware in the Loop simulations, it is suggested to integrate information from the multibody dynamic simulations programmed at the design level.Item Parallel kinematics for machine tools(Springer London, 2009) Altuzarra, Oscar; Hernández, Alfonso; San Martín, Yon; Larrañaga, Josu; Centros PRE-FUSION TECNALIA - (FORMER); ROBOTICA_AUTOMAParallel kinematics is a branch of mechanics that focusses on manipulators formed by closed kinematic chains, i.e., mechanisms that have an endeffector joined to the fixed frame by several limbs. Such a kinematic structure provides some advantages regarding stiffness, acceleration and weight, but has some drawbacks due to mechanical complexity and limited workspaces. In the field of machining, there have been several applications of such mechanisms to machine tools. Earlier designs based on hexapods did not fulfil expectations but new topologies are promising. In this chapter, there is first a description of the evolution of parallel kinematics in the manufacturing industry. Second, the authors expose a design methodology giving some hints on the main problems to overcome. Third, there is a study on calibration processes that can be applied to these machines. And, at the end, there is a description of control issues.Item Smart connected and interactive production control in a distributed environment(2011) Schlegel, Thomas; Thiel, Simon; Foursa, Maxim; Meo, Fabrizio; Larrañaga, Josu; Ibarbia, Jon Agirre; Haidegger, Géza; Mezgár, István; Paniti, Imre; Praturlon, Anja Herrmann; Canou, Joseph; ROBOTICA_AUTOMA; GENERALThe European research project INT-MANUS embedded in the I*PROMS European network of excellence addresses the increasing demand for flexibility and adaptivity, which is summarised by rapid reconfiguration of complete factories, flexible reaction to new demands as well as related aspects in human computer interaction (HCI), software, and production systems. The project's main goal has been to develop a new technology for the production plants of the future: the Smart Connected Control Platform (SCCP). This platform allows controlling a factory with the help of an open distributed and learning agent platform that integrates machines, robots, and human personnel. It offers an enterprise service bus like concept for dynamic and decentrally controlled production systems, which flexibly connects machines and IT systems like robotic transport systems, terminals, mobile control systems, etc.