Specifying Simulation Accuracy/Speed Tradeoff
Parameters that Affect Accuracy and Speed
To trade off accuracy and simulation time, adjust one or more
of the following parameters:
Relative tolerance (in the Configuration
Parameters block dialog box)
Absolute tolerance (in the Configuration
Parameters block dialog box)
Max step size (in the Configuration
Parameters block dialog box)
Constraint Residual Tolerance (in
the Solver Configuration block dialog box)
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Determining Appropriate Accuracy/Speed Parameter Values
In most cases, the default tolerance values produce accurate
results without sacrificing unnecessary simulation time. The parameter
value that is most likely to be inappropriate for your simulation
is Max step size, because the default value, auto,
depends on the simulation start and stop times rather than on the
amount by which the signals are changing during the simulation. If
you are concerned about the solver's missing significant behavior,
change the parameter to prevent the solver from taking too large a
step.
The Simulink documentation describes the following parameters
in more detail and provides tips on how to adjust them:
The Solver Configuration block
reference page in the Simscape documentation explains when to
adjust the Constraint Residual Tolerance parameter
value.
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 | Selecting a Solver | | Avoiding Simulation Issues |  |
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