How can fix that error in this simulation?

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Merve Ala
Merve Ala 2023-4-19
回答： Walter Roberson 2023-4-19
I am working on this simulation and it gives me this error. What can I do?
An error occurred while running the simulation and the simulation was terminated
Caused by:
  • Derivative of state '1' in block 'hwmid/Aerodynamic_Data/total forces/Subsystem/Integrator' at time 0.0 is not finite. The simulation will be stopped. There may be a singularity in the solution. If not, try reducing the step size (either by reducing the fixed step size or by tightening the error tolerances)
Component:Simulink | Category:Block error

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回答（1 个）

Walter Roberson
Walter Roberson 2023-4-19
Derivatives not being finite at time zero are typically mistakes in initialization -- in particular, forgetting that input signals that are updated by a feedback model need to be initialized
But it is also not uncommon to have a model that effectively has a division by t (time) and forgetting that at time 0 that means a division by 0.
https://www.mathworks.com/help/simulink/slref/integrator.html#f7-890704_sep_f7-1513452

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