Abstract
The simulation of mechanical devices using multibody system dynamics (MBS) algorithms frequently requires the consideration of their interaction with components of a different physical nature, such as electronics, hydraulics, or thermodynamics. An increasingly popular way to perform this task is through co-simulation, that is, assigning a tailored formulation and solver to each subsystem in the application under study and then coupling their integration processes via the discrete-time exchange of coupling variables during runtime. Co-simulation makes it possible to deal with complex engineering applications in a modular and effective way. On the other hand, subsystem coupling can be carried out in a wide variety of ways, which brings about the need to select appropriate coupling schemes and simulation options to ensure that the numerical integration remains stable and accurate. In this work, the co-simulation of hydraulically actuated mechanical systems via noniterative, Jacobi-scheme co-simulation is addressed. The effect of selecting different co-simulation configuration options and parameters on the accuracy and stability of the numerical integration was assessed by means of representative numerical examples.
Highlights
During the last decades, multibody-based simulation tools have established themselves in industry as they allow rapid testing of mechanical systems without costly prototyping
The results showed that the accuracy of Jacobischeme co-simulation of mechanical and hydraulic systems can be enhanced by a proper selection of coupling variables and integration schemes
The given examples are used in the benchmark to gain insight into the noniterative Jacobischeme co-simulation of multibody and hydraulic dynamics
Summary
Multibody-based simulation tools have established themselves in industry as they allow rapid testing of mechanical systems without costly prototyping. Most engineering applications of industrial interest include mechanical components whose behavior can be described with conventional multibody system dynamics (MBS) formulations, and elements with different physical properties, behavior, and time scale. These include control and electronics components, hydraulics circuits, and thermodynamic subsystems, among many others. When this is the case, the dynamics of the multibody components can no longer be considered on its own; instead, the interaction with the rest of elements in the engineering assembly must be appropriately described and taken into account in the simulation. For some of these applications, it is possible to develop monolithic formulations that are capable of describing the overall system dynamics with a common set of equations [3]
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