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7.8

MatLab Simulink: S domain to Z domain?

Asked by jhui in Math & Science

Tags: domain, z, matlab, s, simulink

Hi~~ I having difficulty on using MatLab Simulink on converting a S domain transform function to Z domain~ I just wondor anyone have experience on this~

I get a transform function

H = tf([27.75 2.51675 0.5513 0],[4.2946e-8 0.00096105 6.4387 13587 2.6318e6 1.9954e5 4371])

                           27.75 s^3 + 2.517 s^2 + 0.5513 s
--------------------------------------------------------------------------------------
4.295e-008 s^6 + 0.000961 s^5 + 6.439 s^4 + 13587 s^3 + 2.632e006 s^2 + 199540 s + 4371

and wanna convert it into Z-domain by

>> Hd=c2d(H,0.0001,'zoh')
 
Transfer function:
6.27e-005 z^5 - 4.2e-005 z^4 - 0.0002297 z^3 + 0.0003141 z^2 - 8.462e-005 z - 2.049e-005
----------------------------------------------------------------------------------------
         z^6 - 4.497 z^5 + 8.211 z^4 - 7.753 z^3 + 3.97 z^2 - 1.037 z + 0.1067
 
Sampling time: 0.0001

The Step response looks fine in

step(Hd)

but I cannot obtain the result to put into Simulink using Discrete Transform Function Block?? which I have also set the sampling time to 0.0001 already~ Anyone have exp. this as well and can share your solution with me?

Thanks~

James.
[+][-]11/14/02 04:19 PM, ID: 7450925Accepted Solution

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About this solution

Zone: Math & Science
Tags: domain, z, matlab, s, simulink
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Solution Provided By: prashant_n_mhatre
Participating Experts: 1
Solution Grade: A
 
[+][-]04/28/04 09:28 AM, ID: 10940894Administrative Comment

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[+][-]05/02/04 09:14 AM, ID: 10972060Administrative Comment

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