I`m new to matlab and I need some help about poles and tf?

(s+17)/(s^3+10s^2+17s+114)

Sys=tf([1,17],[1,10,17,114])

Pole(sys)

ans =

-9.4756 + 0.0000i

-0.2622 + 3.4586i

-0.2622 - 3.4586i

Root(sys)

ans =

-17

Pzmap(sys)

1) Can you explain open loop stability?

2) How do I know if this system oscillate? Why?

Answer 1

[Sulaymon Eshkabilov]

Use root locus plot and step response simulations that will answer to your questions, e.g.:

Sys=tf([1,17],[1,10,17,114]);
pzmap(Sys)

figure('name', 'Root-locus')
rlocus(Sys)

figure('name', 'Step-response')
step(Sys)