Why are my simulink initial conditions sometimes not met, despite high priority?

Question

Daniel Trapp 2019-7-24

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https://ww2.mathworks.cn/matlabcentral/answers/473282-why-are-my-simulink-initial-conditions-sometimes-not-met-despite-high-priority

回答： Martin 2023-10-4

I set the initial temperature of a Simscape thermal mass to 303K and put a temperature sensor on it. Solver is set to start with steady state. Still, the temperature of this mass is 293 at t=0s and there are no warnings or errors reported in the diagnostics viewer. Large screenshot is attached.

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Hari Krishna Ravuri 2019-7-31

Hi,

I tried to reproduce the mentioned initial conditions on a simple model and it is working as expected.Please provide the model, so that a workaround may be provided.

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Answer 1

Martin 2023-10-4

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When selecting Start simulation from steady state, the solver tries to find what the model would go to after a very long simulation. It does not use the initial targets in set in the blocks.

How Simscape Simulation Works - MATLAB & Simulink (mathworks.com)