How do I change the initial condition at time t=0 of an IC block to an external value ?

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Nikolas Haimerl 2019-9-2

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评论： Jonas 2019-9-3

I have a similiar Simulink system as in the example shown below. However, I would like the initial velocity at time t=0 to be an external value (not 15 as shown in the example). Is there a way to give the IC block an external value, which is then the initial condition at time t=0?

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Answer 1

Nikolas Haimerl 2019-9-2

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hi,

Thank you for your answer. Do you also have a suggestion how to circumvent the issue with the time system ? You were right in the assumption, that my system uses a continous time system.

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Jonas 2019-9-3

I have very little experience with Continuous time modes, I always use discrete so I cannot help you with this I believe.

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Answer 2

Jonas 2019-9-2

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Hi

You should try the implementation below:

The IC block with initial condition [0] will make sure your model runs with an initial condition. However, the Add block behind it allows you to give an offset to this initial condition with any value you want. By using the unit delay block with input 0, you remove this offset after the first simulation sample.

The only problem I see is that I think you are using a continuous integrator block, my suggestion was only tested in a discrete time system.