Lead-lag system and model with Simulink

[gfd43tg]

Homework Statement

Homework Equations

The Attempt at a Solution

Hello,

I am trying to construct the model, but I don't know how to incorporate 3 steps. I tried making 3 step blocks, but the input for the transfer function will only take one line. Then I tried to use one step block and make a vector indicating a new step at 3 different times

But this is not working, it doesn't like the vector input. Any idea how I can utilize 3 steps?

 

[donpacino]

you can use a summing block and three separate step blocks.
There is also an input that will allow you to create your own waveform

 

[gfd43tg]

Thanks, I didn't know how the sum block worked before, now I do.

 

[LvW]

I am a bit surprised about the transfer function G(s)=(s+1)/(s+1)=1.
Who told you that this is a lead-lag block? It is a unity gain element, nothing else.

 

[gfd43tg]

The homework assignment said, look at the problem statement.

 

[LvW]

Didn`t you realize that G(s)=1 ?
Should be a typing error; why not googling for lead-lag?

 

[gfd43tg]

Yes, admittedly I don't know what lead-lag means. I was just trying to solve the problem for the homework

 

[LvW]

Watch point e) of the problem statement (time constants).
Time constants appear in th transfer function as factors, for eample: (s*T+1).

 

[donpacino]

I assumed that OP made a typo. oops.

https://en.wikipedia.org/wiki/Lead–lag_compensator