Talk:Linear system/Archive 1

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

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


 * Why don't you improve it? Nixdorf 20:42, 18 June 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 June 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 June 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


 * 12 - Find the damping ratio and the natural frequency of the system


 * — Preceding unsigned comment added by Ahmad S M (talk • contribs) 13:58, 11 March 2007 (UTC)

Definition and example
I think the article could be improved if a "Definition" title was added just after the 1st paragraph, and an "Examples" section just before the first (current) chapter. Albmont (talk) 13:16, 27 February 2009 (UTC)

Correction?
Should not:

where



represents the lag time between the stimulus at time k and the response at time n.

Read "represents the lag time between the stimulus at time m and the response at time n. "?-- — Preceding unsigned comment added by 72.244.232.226 (talk) 19:50, 1 September 2009 (UTC)

Scaling
The link to "scaling" is a dismbiguation page. Should the correct link be to "scaling (geometry)"? DGERobertson (talk) 16:10, 21 January 2010 (UTC)

And if...
...some kid comes here expecting to find homework help, will he/she find it? Probably not. — Preceding unsigned comment added by 68.101.123.219 (talk) 03:12, 25 May 2007 (UTC)


 * I second that. I have read some mathematics on a college level, and this just left me confused. Some simple everyday examples to show what a linear system is and isn't, please? Nirion (talk) 14:24, 10 May 2010 (UTC)