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Setup_Scicos - Scicos simulator parameters

Modules

• Scicos

In the main Scicos window, clicking on the Setup menu item invokes a dialog box that allows you to change integration parameters.

The parameter values of that dialog box are evaluated each time the button 'Ok' is pressed. No symbolic expressions are stored in the Setup, only digital values.

Dialog box

• Final integration time : integration ends at this time, it always starts from 0.

  The Final integration time can be overloaded by the use of the ENDBLK block (in Other palette).

• Real time scaling : forces real time simulation by setting Scicos unit of time to 1 second.

• Integrator absolute and relative tolerances : solver properties.

• Tolerance on time : the smallest time interval for which the ode solver is used to update continuous states.

• Maximum integration time interval : the maximum time interval for each call to solver, it must be reduced if the error message "too many calls" is encountered.

• Solver : choose the numerical solver to be used :
  • 0 : Lsodar : Method: BDF, Nonlinear solver= NEWTON
  • 1 : Sundials/CVODE : Method: BDF, Nonlinear solver= FUNCTIONAL
  • 2 : Sundials/CVODE : Method: BDF, Nonlinear solver= FUNCTIONAL
  • 3 : Sundials/CVODE : Method: ADAMS, Nonlinear solver= NEWTON
  • 4 : Sundials/CVODE : Method: ADAMS, Nonlinear solver= FUNCTIONAL
  • 5 : DOPRI5 : Method: Runge-Kutta 4(5)
  • 100 : Sundials/IDA

  Note that in current Scicos version when the diagram use implicit blocks (like Modelica blocks), Scicos automatically switches the solver to the value 100.

• Maximum step size : max time step taken by solver.

Authors

Scicos Team