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Runge-Kutta-Fehlberg

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Runge-Kutta-Fehlberg

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This is an explicit variable-step 4/5-order derivatives method, primarily designed to solve non-stiff and mildly stiff differential equations. Because the method has very low overhead costs, it will usually result in the least expensive integration when solving problems requiring a modest amount of accuracy and having equations that are not costly to evaluate. 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).
Step Size (not required)
Initial: The step size for the first simulation step (default: 0.01).
Maximum: The maximum size of a simulation step (default: 1).