Transfer Function in Simulink

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

Answer 1

[Paulo Silva]

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')

[Vinoth]

Thanks a lot :)