real time control

[leongchuan]

i uisng the control advance toolkit to develop my solar tracker system. The solar tracker have left and right sensor to sense the light position.i have use simulink to develop the control system before and it work well . However, when using labview, it has low response speed , large error and sometime the tracker once sense the light then just keep rotating and did not stop at the light position. I believe i have build very good transfer funstion for the system since it work well with simulink. I believe there is some labview technic to build a real time system which i dun know . So hopefully you can help me

[Dr._Imad]

How are you doing this in LabView ?
are you using the LV PID tool kit ?
are you implementing the transfer function and control algorithm in LabView ?
are you running Matlab/simulink directly from Labview ?

[konsang]

I did not use the PID toolkit and i just use the advance toolkit. I use the transfer function tool in the advance toolkit.I developed the entire control system using labview only(no other software is included).I have developed a very good control model since it runs well( good response time , less error and overshot) under simulink. However , when i write whole program in labview , it has terribly bad response.
Do i need to use other labview toolkit for writting a control system ?
Thanx

[Dr._Imad]

A control scheme developed in matlab/simulink, if programmed properly in LabView should yield the same results.
You can run the matlab/simulink loop directly from LabView. All that LabView would then be doing is to output the calculated analog output control signals.

If the control scheme does not have too many dependent variables, the PID control tool kit can do the control.