insert an array of values inside a transfer function block(simulink)

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mohamed sarfaras JAFARULLA KHAN 2022-1-26

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回答： Riya 2023-11-19

I have tau=0.1:0.1:10;

this array of tau values must be simulated for an ODE(xdotdot+tau*xdot+x=u) using a transfer function(simulink) block to find ideal value of tau.

denominator of transfer function is [1 tau*s 1]

I am unable add array of values,to make simulate multiple values in simulink .

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Answer 1

Riya 2023-11-19

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Hello mohamed sarfaras JAFARULLA KHAN,

As per my understanding you want to insert an array of values inside a transfer function block in Simulink.

Please note that to simulate multiple values of tau in Simulink using a transfer function block, you can follow these steps:

1. Create a MATLAB Function block in Simulink. This block will allow you to define and use MATLAB code within your Simulink model.

2. Inside the MATLAB Function block, define the array of tau values using the given expression: `tau = 0.1:0.1:10;`.

3. Use a for loop to iterate over the tau values and simulate the system for each value. Within the loop, create a transfer function object using the `tf` function and specify the numerator and denominator coefficients.

Here is an example of how the MATLAB Function block code could look like:

function y = tauSimulation(u) 
tau = 0.1:0.1:10; 
y = zeros(size(tau)); 
for i = 1:length(tau) 
    sys = tf(1, [1, tau(i), 1]); 
    y(i) = lsim(sys, u); 
end 
end 

4. Connect the input `u` to the MATLAB Function block and use the output `y` to observe the simulated response for each tau value.

By implementing this MATLAB Function block in your Simulink model, you will be able to simulate the system for multiple values of tau using the transfer function block.

I hope it helps.

Regards

Riya