simulink Transfer Functions

[Smurphy]

im trying to make a transfer function of 63e6/(s+30 )*(s+140 )*(s+2.5) but im not having any success as the closet function i can make is

63e6/s^5+30s^4+s3+140s^2+s+2.5 anybody out there with any ideas on how to fix this?

regards

Smurphy

[Smurphy]

These are 3 different variations in which i have tried but the second 2 fail and the 1st gives me the wrong transfer

Regards smurphy

[Barp]

If you had LabVIEW Control Design and Simulation Module, you could use the ZPK representation and use the Zero-Pole-Gain function from "Simulation>>Continuous", where you can enter the transfer functions as its poles. For your example, the Gain would be 63E6, and the poles would be [-30,-140,-2.5]. It you really want to keep the implementation of this function in Transfer Function Format, you can use Control Design VIs to create a ZPK model and use "Convert to Transfer Function" VI is the Conversion palette. This will convert the parameters automatically for you.

It is very possible you could do the same with other software in the market.

Message Edited by Barp on 11-25-2009 09:12 AM

[Andrew McL]

Hi,

Well done Barp, you beat me to suggesting that. Unfortunately as National Instruments does not produce Simulink(c) you will need to contact the Mathworks(c) for support with this product. 

Many thanks,