develop vi controller using time and laplace domain in transfer function

[azwhoony]

Hi all,

I need opinion from you guys. I've used PID toolkit before and it's convenient to use this compare to mathematical func etc. But currently we have some requirements from our client to control a system based on transfer function in time(t) and laplace(s) domain for PID, feedforward and fuzzy controllers. Is there any faster way to do this rather develop the code ourselves? Perhaps library or anything?

Thanks n regards,

- az -

[F._Schubert]

Concerning PIDs I've been once to a product show of an NI alliance partner that interfaces LV:

http://sine.ni.com/apps/utf8/niaa.pro_view?p_all_id=10737 

But I don't know if this is what you need. Generally, you could try a search in the alliance program if there is a tool for this.

Felix

[KateB]

LabVIEW has control design and simulation module which can apply transfer function in VI as shown in http://sine.ni.com/nips/cds/view/p/lang/en/nid/206895 

You probably evaluate it to see whether it suites with your application.

[azwhoony]

Thanks Felix and KateB.

I think Control Design and Simulation module might help. Currently I'm trying to understand how it works but most of the examples seems not enough for me to relate with the actual system (or maybe I'm the one who doesn't understand..). OK let say I'm going to use CDex Design and Implement PID example as reference, can we connect the subVI of "DC Design PID for Discrete System.vi" to the PID.vi ?? I'm asking in a sense that let say I've done programs using PID and Fuzzy Logic toolkits, can I just wire the input parameters for PID and Fuzzy with these transfer function capabilities??

Thanks.

regards,

- az - 

[KateB]

You must translate PID parameter into transfer function coefficient first.

You may find its relation from page 11-4 of C:\Program Files\National Instruments\LabVIEW 2009\manuals\CD_User_Manual.pdf.