SIR Simulink Model Function Block

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Tahmid Abdullah
Tahmid Abdullah 2020-8-18
编辑： Jim Riggs 2020-8-18
I am modelling a simple SIR model. I have modelled the SIR model in Simulink as shown below:
I want to change the beta constant to a variable input but I dont know how to change the input parameter beta to a time-dependent parameter in Simulink?
I know of the function block in Simulink but how do I input 'time' which is days here. We are simulating for 300 days but how do i input the simulation time at the top which is 300 to become an input for the time-dependent beta
Thanks in advance

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回答（1 个）

Jim Riggs
Jim Riggs 2020-8-18
编辑：Jim Riggs 2020-8-18
In the Simulink library browser, on the "sources" pallet, you will find a "clock" function. Use this to create a time signal.
(Note that the output of the clock function is in seconds, so you will need to scale it to get days)

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