Browsing by Research Group "Laboratorio de Enxeñaría Mecánica (LIM)"
Now showing items 1-20 of 55
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A benchmark problem with singularities for multibody system dynamics formulations with constraints
(Springer, 2023-04-19)[Abstract] When performing the numerical integration of multibody systems (MBS) dynamics, it is possible to choose from a wide variety of methods and implementations. Selecting the most appropriate option for a particular ... -
A collaborative benchmarking framework for multibody system dynamics
(Springer, 2009)[Abstract] Despite the importance given to the computational efficiency of multibody system (MBS) simulation tools, there is a lack of standard benchmarks to measure the performance of these kinds of numerical simulations. ... -
A Fair and EMG‑Validated Comparison of Recruitment Criteria, Musculotendon Models and Muscle Coordination Strategies, for the Inverse‑Dynamics Based Optimization of Muscle Forces During Gait
(BioMed Central Ltd., 2021-01)[Abstract] Experimental studies and EMG collections suggest that a specific strategy of muscle coordination is chosen by the central nervous system to perform a given motor task. A popular mathematical approach for solving ... -
A novel concept for analysis and performance evaluation of wheeled rovers
(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 ... -
An Automated Methodology to Select Functional Co-Simulation Configurations
(Springer, 2020-01)[Abstract] The development of machinery often requires system-level analysis, in which non-mechanical subsystems, such as hydraulics, need to be considered. Co-simulation allows analysts to divide a problem into subsystems ... -
Applying a muscle fatigue model when optimizing load-sharing between muscles for short-duration high-intensity exercise: A preliminary study
(Frontiers, 2023-04)[Abstract] Introduction: Multiple different mathematical models have been developed to represent muscle force, to represent multiple muscles in the musculoskeletal system, and to represent muscle fatigue. However, incorporating ... -
Assessment of Linearization Approaches for Multibodydynamics Formulations
(2017-07)[Abstract] Formulating the dynamics equations of a mechanical system following a multibody dynamics approach often leads to a set of highly nonlinear Differential Algebraic Equations (DAEs). While this form of the equations ... -
Assessment of Methods for the Real-Time Simulation of Electronic and Thermal Circuits
(MDPI, 2020-03)[Abstract] Time–domain simulation of electronic and thermal circuits is required by a large array of applications, such as the design and optimization of electric vehicle powertrain components. While efficient execution ... -
Augmented Lagrangian index-3 semi-recursive formulations with projections: Direct sensitivity analysis
(Springer, 2023-08-24)[Abstract] Sensitivity analysis represents a powerful tool for the optimization of multibody system dynamics. The performance of a gradient-based optimization algorithm is strongly tied to the dynamic and the sensitivity ... -
Behaviour of Augmented Lagrangian and Hamiltonian Methods for Multibody Dynamics in the Proximity of Singular Configurations
(2016-04)[Abstract] Augmented Lagrangian methods represent an efficient way to carry out the forward-dynamics simulation of mechanical systems. These algorithms introduce the constraint forces in the dynamic equations of the system ... -
Comparison of Several Muscle Modeling Alternatives for Computationally Intensive Algorithms in Human Motion Dynamics
(Springer, 2022-04-05)[Abstract] Several approaches are currently employed to address the predictive simulation of human motion, having in common their high computational demand. Muscle modeling seems to be an essential ingredient to provide ... -
Computational structural analysis of spatial multibody systems based on mobility criteria
(Elsevier, 2022-06-22)[Abstract] Computational efficiency is a critical aspect of multibody dynamics. Recent developments in linear algebra libraries and hardware architectures allow the multibody community to improve the performance of their ... -
Determination of the 3D Human Spine Posture from Wearable Inertial Sensors and a Multibody Model of the Spine
(MDPI, 2022)[Abstract] Determination of spine posture is of great interest for the effective prevention, evaluation, treatment and evolution monitoring of spinal disorders. Limitations of traditional imaging systems, including cost, ... -
Direct Sensitivity Analysis of Multibody Systems With Holonomic and Nonholonomic Constraints via an Index-3 Augmented Lagrangian Formulation With Projections
(2018)[Abstract] Optimizing the dynamic response of mechanical systems is often a necessary step during the early stages of product development cycle. This is a complex problem that requires to carry out the sensitivity analysis ... -
Do Muscle Synergies Improve Optimization Prediction of Muscle Activations During Gait?
(Frontiers Media S. A., 2020-07)[Abstract] Determination of muscle forces during motion can help to understand motor control, assess pathological movement, diagnose neuromuscular disorders, or estimate joint loads. Difficulty of in vivo measurement made ... -
Editorial of Special Issue Combining Sensors and Multibody Models for Applications in Vehicles, Machines, Robots and Humans
(MDPI, 2021-09)[Abstract] The combination of physical sensors and computational models to provide additional information about system states, inputs and/or parameters, in what is known as virtual sensing, is becoming more and more popular ... -
Effect of gravity in wheel/terrain interaction models
(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 ... -
Efficient coupling of multibody software with numerical computing environments and block diagram simulators
(Springer, 2010-03-27)[Abstract] Simulation of complex mechatronic systems like an automobile, involving mechanical components as well as actuators and active electronic control devices, can be accomplished by combining tools that deal with ... -
Eigenstructure assignment and compensation of explicit co-simulation problems
(2022)[Abstract] Co-simulation is an effective and versatile way to determine the forward-dynamics behaviour of complex engineering applications. In co-simulation setups, the overall system dynamics is split into several subsystems ... -
Energy Expenditure Estimation During Crutch-Orthosis-Assisted Gait of a Spinal-Cord-Injured Subject
(Frontiers Media SA, 2019)[Abstract] Determination of muscle energy expenditure by computer modeling and analysis is of great interest to estimate the whole body energy consumption, while avoiding the complex character of in vivo experimental ...
