Mechanical Systems

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Modeling of complete drive systems

Caspoc provides a mechanical domain and a component library that includes numerous translational and rotational components. In the library there are non-linear components for modeling of couplings, gearboxes, as well as static and sliding friction. In combination with power electronics and control engineering, the mechanical components are used for modeling and simulation of complete drive systems such as servo-mechanisms and powertrains for automotive applications.

The example below is designed to investigate the drive train in an electric vehicle and shows the planetary gear as well as the automotive powertrain.

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Ideal Couplings and inelastic collisions

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Similar to the ideal switches Caspoc provides ideal mechanical couplings, that can instantly close or open. In the closed state, it is a fixed connection between the flanges, in the open state it does not transmit any force or torque.

Caspoc it possible to place an ideal coupling between two rotating masses and to close the clutch while the masses have different speeds. Caspoc treats such an event as a completely inelastic collision and calculates the common speed after the collision on the basis of the angular momentum conservation law.

This method is used not only for coupling, but also for the modeling of backlash, which usually occurs in connection elements and gear transmissions.

Models from the electric drives library can be coupled directly with the models from the mechanical library. The mechanical library for modeling rotating MultiBody systems can be applied to, for example, automotive powertrains. It has been designed to provide a convenient modeling methodology and deliver efficient simulation of these complex systems. The models support the full design cycle using simple 1D representations for concept evaluation that easily evolve into detailed MultiBody models for detailed analysis. Animation is included in all the parts to aid understanding of the system dynamics.

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