This enter image description here

Not sure what to do. At first I ignored what is said about using an integrator and drew the block diagram of the system, which looked a little complicated. So now, using just integrators I am stuck. If we try just taking the first system

x'1 = x1 + 4u

if we want to us an integrator, where y' = u, how can we ever draw this while satisfying the previous equation?

EDIT: Actually I think I got your hint. Is my system correct ?

enter image description here


1 Answer 1


You can use the following block diagram. Note that your $\boldsymbol{D}=\boldsymbol{0}$.

enter image description here

If you really want to have all the states you could draw it like the following picture. You can neglect all gains with $1$, if gain blocks are not allowed (for whatever crazy reason) then you can replace them by an equivalent number of signals to the summation block. eg. gain of 3 for $x_2$ will be split into three separate lines all connected to the summation block.

enter image description here

  • $\begingroup$ i was expecting every block to be of type integrator $\endgroup$
    – friartuck
    Oct 7, 2017 at 22:57
  • $\begingroup$ so is my 2nd diagram not correct in my original question above? $\endgroup$
    – friartuck
    Oct 8, 2017 at 20:59
  • $\begingroup$ You should upload your pictures in the proper orientation. And you Block diagram is not correct, you have not gain blocks. Please have a look at my diagram. $\endgroup$
    – MrYouMath
    Oct 9, 2017 at 12:09

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