Derivative of state 'X? in block 'integrator' at time Y is not finite

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Giuseppe
Giuseppe 2023-11-6
回答： Shreeya 2024-7-4
hello. i have a problem in a simulink model. i'm modelling the bycicle dynamics. i made a matlab fuction where i derivate my equations. my problem is that i have the sideslip angle (steering-(v+a1*yaw_rate)/u) and in same time, the u (longitudinal velocity) is 0 so in sideslip angle' s calculation there is a division for 0 that take the solutions not finite. i must use Ode4 fixed step so i can't change the solver type. how can resolve it?
thanks

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回答（1 个）

Shreeya
Shreeya 2024-7-4
Hello
A quick glance sugests that you want to handle a division by 0 in your Simulink Model. Here are a few workarounds for it:
  1. Add a conditional block in the model which deals with the edge case of u being equal to 0.
  2. You can also add a very small threshold to u, which can prevent a division by 0.
You can also refer to the answer linked below for more help:;
https://www.mathworks.com/matlabcentral/answers/93046-how-can-i-avoid-errors-due-to-division-by-zero-in-simulink#:~:text=Numerical%20division%20by%20zero%20is,zero%20to%20a%20division%20block.
Let me know if this helps.

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