Talk:Linear system

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This is not really an adequate discussion, considering the importance of the topic.

Charles Matthews 20:29, 18 Jun 2004 (UTC)

Why don't you improve it? Nixdorf 20:42, 18 Jun 2004 (UTC)

Well, you know, I arrived here by redirecting a link to it. So I'm busy with other things.

Charles Matthews 20:46, 18 Jun 2004 (UTC)

I agree.. the article seems to well start to answer the question "What is it used for"; whereas the description of "What a Linear System is" seems too shallow... This line seems strange.. "The mathematical properties of linear systems will typically include differential equations,".. It seems an artificial an uh property... DEs and Linear Systems are still different concepts, aren't they? Mysidia 20:48, 18 Jun 2004 (UTC)

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

[edit] And if...

...some kid comes here expecting to find homework help, will he/she find it? Probably not.

[edit] Causal property

Should the causal property be included here?

Not all linear systems are causal. Not all causal systems are linear. —Preceding unsigned comment added by CSears (talk • contribs) 23:14, 21 September 2007 (UTC)