Transfer Function in Simulink

2011 12 15
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Hi all,
i have a Transfer function =(s+1)/(a*s^2 + b*s +1)
I want to change the coefficients 'a' and 'b' during the runtime in simulink..how can i do this??
--vinoth

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Paulo Silva
Paulo Silva 2011-12-15

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Use those variables (a and b) in the simulation, define them in the workspace with default values before the simulation starts
a=1;
b=1;
Simulink reads the values and uses them but it doesn't read them again unless you stop and run the simulation again or you execute the command:
set_param('sys', 'SimulationCommand', 'update')
Example
a=2;
b=4;
set_param('sys', 'SimulationCommand', 'update')

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