Register to reply

Order of system

by dhruv.tara
Tags: order
Share this thread:
dhruv.tara
#1
Jun1-11, 05:37 AM
P: 46
1. The problem statement, all variables and given/known data
In control engg. we define the order of the system as (or atleast as far as I have understood as) Nu/s^m*(s+a)(s+b)....

I cannot understand the base for such classification? Why are we classifying systems based on the number of poles they have on origin?


2. Relevant equations



3. The attempt at a solution
Phys.Org News Partner Science news on Phys.org
Law changed to allow 'unlocking' cellphones
Microsoft sues Samsung alleging contract breach
Best evidence yet for coronal heating theory detected by NASA sounding rocket
CEL
#2
Jun3-11, 11:14 AM
P: 639
No, the order of the system is the number of poles (at the origin and elsewhere).
Ecthelion
#3
Jun3-11, 12:57 PM
P: 27
CEL is correct.

Something to add however is the way you have written the transfer function - it's done for a purpose. In controls seeing how many poles are at the origin, you're s^m part of the denomenator, has many ramifications that can be crucial when interpreting a system response or designing for one. So in seeing, and perhaps formatting a transfer function in this fashion, it is an aesthetic move but can make things easier.

dhruv.tara
#4
Jun4-11, 09:44 AM
P: 46
Order of system

thanks guys I was confusing myself with the order and type of the system... good I could get that clear just in time :)


Register to reply

Related Discussions
Reducing Second Order ODE system to First Order Calculus & Beyond Homework 0
Converting an nth order equation to a system of first order equations Calculus & Beyond Homework 10
Reducing third order ODE to a system of first order equs + 4th order runge-kutta Differential Equations 1
Splitting a second order PDE into a system of first order PDEs/ODEs Differential Equations 3
Reducing third order ODE to a system of first order equs + 4th order runge-kutta Calculus & Beyond Homework 0