• A novel concept for analysis and performance evaluation of wheeled rovers 

      Ghotbi, Bahareh; González Varela, Francisco Javier; Kövecses, József; Angeles, Jorge (Elsevier, 2015-01)
      [Abstract] - The analysis, design, and operation planning of rovers are often based on predictive dynamic simulation, where the multibody model of the vehicle is combined with terramechanics relations for the representation ...
    • Effect of gravity in wheel/terrain interaction models 

      Kovács, László L.; Ghotbi, Bahareh; González Varela, Francisco Javier; Niksirat, Parna; Skonieczny, Krzysztof; Kövecses, József (2020)
      [Abstract] Predicting the motion of wheeled robots in unstructured environments is an important and challenging problem. The study of planetary exploration rovers on soft terrain introduces the additional need to consider ...
    • Energy-Leak Monitoring and Correction to Enhance Stability in the Co-simulation of Mechanical Systems 

      González Varela, Francisco Javier; Arbatani, Siamak; Mohtat, Arash; Kövecses, József (2019-01)
      [Abstract] Non-iterative co-simulation is an increasingly important technique for the simulation of complex mechanical systems. Adopting co-simulation schemes enables the simultaneous use of computational resources and ...
    • Kinematic Modelling and State Estimation of Exploration Rovers 

      Lou, Qingfeng; González Varela, Francisco Javier; Kövecses, József (2019-04)
      [Abstract] State estimation is crucial for exploration rovers. It provides the pose and velocity of the rover by processing measurements from onboard sensors. Classical wheel odometry only employs encoder measurements of ...
    • Load assessment and analysis of impacts in multibody systems 

      González Varela, Francisco Javier; Kövecses, József; Font-Llagunes, Josep M. (2016-09)
      [Abstract] The evaluation of contact forces during an impact requires the use of continuous force based methods. An accurate prediction of the impact force demands the identification of the contact parameters on a case-by-case ...
    • Mobility Evaluation of Wheeled Robots on Soft Terrain: Effect of Internal Force Distribution 

      Ghotbi, Bahareh; González Varela, Francisco Javier; Kövecses, József; Angeles, Jorge (2016-06)
      [Abstract] Many applications of wheeled robots include operations in unstructured environments. Optimizing vehicle mobility is of key importance in these cases. Reduced mobility can limit the ability of the robot to achieve ...
    • Model-based coupling for co-simulation of robotic contact tasks 

      Peiret, Albert; González Varela, Francisco Javier; Kövecses, József; Teichmann, Marek; Enzenhoefer, Andreas (IEEE, 2020-10)
      [Abstract] Co-simulation of complex robotic systems allows the different components to be modelled and simulated independently using methods and tools tailored to their nature and time-scale, which makes the implementation ...
    • Multibody system dynamics interface modelling for stable multirate co-simulation of multiphysics systems 

      Peiret, Albert; González Varela, Francisco Javier; Kövecses, József; Teichmann, Marek (Elsevier, 2018-09)
      [Abstract] Many industrial applications benefit from predictive computer simulation to reduce costs and time, and shorten product development cycle. Computational multibody system dynamics formalisms and software tools ...
    • Performance indicators for wheeled robots traversing obstacles 

      Nowac, William; González Varela, Francisco Javier; MacMahon, Sadhbh; Kövecses, József (2020-04)
      [Abstract] An important element of wheeled robot operations on uneven and unstructured terrain is the ability to overcome obstacles. In this letter, we deal with a part of this obstacle negotiation problem. We particularly ...
    • Use of Penalty Formulations in Dynamic Simulation and Analysis of Redundantly Constrained Multibody Systems 

      González Varela, Francisco Javier; Kövecses, József (Springer, 2013)
      [Abstract] The determination of particular reaction forces in the analysis of redundantly constrained multibody systems requires the consideration of the stiffness distribution in the system. This can be achieved by ...
    • Use of performance indicators in the analysis of running gait impacts 

      Pàmies-Vilà, Rosa; González Varela, Francisco Javier; Kövecses, József; Font-Llagunes, Josep M. (2018)
      [Summary] Foot-ground impact is a critical event during the running cycle. In this work, three performance indicators were used to characterize foot-ground impact intensity: the effective preimpact kinetic energy, ...