Ara es mostren els items 1-20 de 198

    • A bayesian approach to simultaneously recover camera pose and non-rigid shape from monocular images 

      Moreno-Noguer, Francesc; Porta Pleite, Josep Maria (2016)
      Article
      Accés obert
      In this paper we bring the tools of the Simultaneous Localization and Map Building (SLAM) problem from a rigid to a deformable domain and use them to simultaneously recover the 3D shape of non-rigid surfaces and the sequence ...
    • A branch-and-prune method to solve closure equations in dual quaternions 

      Shabani, Arya; Porta Pleite, Josep Maria; Thomas, Federico (2021)
      Article
      Accés obert
      Using dual quaternions, the closure equations of a kinematic loop can be expressed as a system of multiaffine quations. In this paper, this property is leveraged to introduce a branch-and-prune method specially tailored ...
    • A cognitive architecture for automatic gardening 

      Agostini, Alejandro Gabriel; Alenyà Ribas, Guillem; Fischbach, Andreas; Scharr, Hanno; Woergoetter, Florentin; Torras, Carme (2017-06-01)
      Article
      Accés obert
      In large industrial greenhouses, plants are usually treated following well established protocols for watering, nutrients, and shading/light. While this is practical for the automation of the process, it does not tap the ...
    • A feasibility-driven approach to control-limited DDP 

      Mastalli, Carlos; Merkt, Wolfgang; Martí Saumell, Josep; Ferrolho, Henrique; Solà Ortega, Joan; Mansard, Nicolas; Vijayakumar, Sethu (Springer Nature, 2022-12-01)
      Article
      Accés obert
      Differential dynamic programming (DDP) is a direct single shooting method for trajectory optimization. Its efficiency derives from the exploitation of temporal structure (inherent to optimal control problems) and explicit ...
    • A flexible hardware-in-the-loop architecture for UAVs 

      Lepej, Peter; Santamaria Navarro, Àngel; Solà, Joan (2017)
      Text en actes de congrés
      Accés obert
      As robotic technology matures, fully autonomous robots become a realistic possibility, but demand very complex solutions to be rapidly engineered. In order to be able to quickly set up a working ...
    • A linear relaxation technique for the position analysis of multi-loop linkages 

      Porta Pleite, Josep Maria; Ros Giralt, Lluís; Thomas, Federico (2008)
      Report de recerca
      Accés obert
      This report presents a new method able to isolate all configurations that a multi-loop linkage can adopt. We tackle the problem by providing formulation and resolution techniques that fit particularly well together. The ...
    • A micro Lie theory for state estimation in robotics 

      Solà Ortega, Joan; Deray, Jeremie; Atchuthan, Dinseh (2018)
      Report de recerca
      Accés obert
      A Lie group is an old mathematical abstract object dating back to the XIX century, when mathematician Sophus Lie laid the foundations of the theory of continuous transformation groups. As it often happens, its usage has ...
    • A reconfigurable asymmetric 3-UPU parallel robot 

      Sarabandi, Soheil; Grosch Obregon, Patrick John; Porta Pleite, Josep Maria; Thomas, Federico (2018)
      Text en actes de congrés
      Accés obert
      Parallel robots with three UPU legs have received a lot of attention due to the possibility of assembling these legs so that the robot performs either a pure translational or a pure rotational motion. Nevertheless, some ...
    • A review and comparison of ontology-based approaches to robot autonomy 

      Olivares Alarcos, Alberto; Bebler, Daniel; Khamis, Alaa; Goncalves, Paulo; Habib, Maki K.; Bermejo Alonso, Julita; Barreto, Marcoss; Diab, Mohammed; Rosell Gratacòs, Jan; Quintas, João; Olszewska, Joanna; Nakawala, Hirenkumar; Pignaton de Freitas, Edison; Gyrard, Amelie; Borgo, Stefano; Alenyà Ribas, Guillem; Beetz, Michael; Li, Howard (2019-01-01)
      Article
      Accés obert
      Within the next decades, robots will need to be able to execute a large variety of tasks autonomously in a large variety of environments. To relax the resulting programming effort, a knowledge-enabled approach to robot ...
    • A robot learning from demonstration framework to perform force-based manipulation tasks 

      Rozo Castañeda, Leonel; Jiménez Schlegl, Pablo; Torras, Carme (Springer, 2013)
      Article
      Accés obert
      This paper proposes an end-to-end learning from demonstration framework for teaching force-based manipulation tasks to robots. The strengths of this work are manyfold. First, we deal with the problem of learning through ...
    • A singularity-robust LQR controller for parallel robots 

      Bordalba Llaberia, Ricard; Porta Pleite, Josep Maria; Ros Giralt, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés obert
      Parallel robots exhibit the so-called forward singularities, which complicate substantially the planning and control of their motions. Often, such complications are circumvented by restricting the motions to singularity-free ...
    • A space decomposition method for path planning of loop linkages 

      Porta Pleite, Josep Maria; Cortes, Juan; Ros Giralt, Lluís; Thomas, Federico (IEEE, 2007)
      Text en actes de congrés
      Accés obert
      This paper introduces box approximations as a new tool for path planning of closed-loop linkages. Box approximations are finite collections of rectangloids that tightly envelop the robot's free space at a desired resolution. ...
    • A space decomposition method for path planning of loop linkages 

      Porta Pleite, Josep Maria; Cortés, Juan; Ros Giralt, Lluís; Thomas, Federico (2007)
      Text en actes de congrés
      Accés obert
      This paper introduces box approximations as a new tool for path planning of closed-loop linkages. Box approximations are finite collections of rectangloids that tightly envelop the robot's free space at a desired resolution. ...
    • A topological extension of movement primitives for curvature modulation and sampling of robot motion 

      Colomé Figueras, Adrià; Torras, Carme (Springer Nature, 2021)
      Article
      Accés obert
      This paper proposes to enrich robot motion data with trajectory curvature information. To do so,we use an approximate implementation of a topological feature named writhe, which measures the curling of a closed curve around ...
    • A view of network robot systems in urban areas in Europe 

      Sanfeliu Cortés, Alberto (IEEE, 2008)
      Text en actes de congrés
      Accés obert
      Presentation of the projects in network robot systems in Europe
    • A virtual reality framework for fast dataset creation applied to cloth manipulation with automatic semantic labelling 

      Borràs Sol, Júlia; Boix Granell, Arnau; Foix Salmerón, Sergi; Torras, Carme (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Text en actes de congrés
      Accés obert
      Teaching complex manipulation skills, such as folding garments, to a bi-manual robot is a very challenging task, which is often tackled through learning from demonstration. The few datasets of garment-folding demonstrations ...
    • A wire-based active tracker 

      Andrade-Cetto, Juan; Thomas, Federico (IEEE, 2008)
      Article
      Accés obert
      Wire-based tracking devices are an affordable alternative to costly tracking devices. They consist of a fixed base and a platform, attached to the moving object, connected by six wires whose tension is maintained along the ...
    • Action selection for robotic manipulation of deformable objects 

      Cuén Rochín, Saúl; Andrade-Cetto, Juan; Torras, Carme (ESF-JSPS, 2008)
      Text en actes de congrés
      Accés obert
      This paper deals with the manipulation of planar deformable objects for typical service robot applications. Specifically, we present a system that straightens pieces of cloth from any arbitrary initial wrinkle condition ...
    • Active SLAM for autonomous underwater exploration 

      Palomeras, Narcís; Carreras, Marc; Andrade-Cetto, Juan (Multidisciplinary Digital Publishing Institute (MDPI), 2019)
      Article
      Accés obert
      Exploration of a complex underwater environment without an a priori map is beyond the state of the art for autonomous underwater vehicles (AUVs). Despite several efforts regarding simultaneous localization and mapping ...
    • Adaptable multimodal interaction framework for robot-assisted cognitive training 

      Taranovic, Aleksandar; Jevtic, Aleksandar; Torras, Carme (2018)
      Text en actes de congrés
      Accés obert
      The size of the population with cognitive impairment is increasing worldwide, and socially assistive robotics offers a solution to the growing demand for professional carers. Adaptation to users generates more natural, ...