This is the explicit variable-step stiff integration algorithm of Cohen and Hindmarsh. This method is specially suited for explicit models that combine high and low frequency vibrations with little damping (so called "stiff" models). This simulation algorithm has 4 parameters:
Integration Error (required)
Absolute: The absolute integration error, valid for every state variable (default: 1e-6).
Relative: The relative integration error, valid for every state variable (default: 1e-6).
Maximum Step Size (not required): The maximum size of a simulation step (default: 1).
Multistep Method (required): The variable step integration method that is used. A BDF method is default and best suited for stiff systems.
Iteration Type (required): The method used for iteration loops (algebraic relations). The Newton method is default and best suited for stiff systems.