User:ALKODS

I want to revise my knowledge about control systems by answering for these questions :

1 – (( choose the correct )) For a second order system sketch the response of the system to a unit step input, including on the sketch thetime domain specifications ( rise time , settling time , peak time , delay time over shoot ) ? 2 – What the meaning for these terms :

rise time, peak time

settling time

delay time over shoot

3 – What do we mean by the frequency response ( F.R.) of the system? state the types of techniques that are used in F.R.?

4 – What is a compensator in the control system ?

5 – Define the gain margin and the phase margin ?

6 – What do we mean by PID controller ?

7 – wht do we mean by stable system, marginally stable, and unstable system ?

8 – for the system shown, find the time-constant of the closed loop system ?

G (s) = 10 / ( S + 10 ) & H(s) = 0.04 S

9 – Given k G(s) = k/ { S ( S + 2 ) ( S + 4 ) } Find the range of k that makes the system stable? What is the angular frequency of the system at the maximum stable gain ?

10 – For a unity feedback control system, given

KG(s)= K (S+6)/ {S(S+4)} -                                                               sketch the root-locus for this system ? 11 – Given G(s)= 2/ { S(S+2) } & H(s) = (S+4) jhghg

Find the damping ratio and the natural frequency of the system