Estimate and apply transfer function to vibration data

[lucvh]

Hi,

I am trying to reduce the error in the controller for a stewart platform.

At the moment I am trying to experiment with estimating the transfer function of the error, and applying the inverse of the transfer function to the input data.

I have an input file sampled at 50hz of displacement data, and an output file measured at 50hz of acceleration data. Using labview i have run the input displacement file through a double derivative function and i am trying to estimate the transfer function between this double derivative of the input and the output file. At the moment i am using tfestimate and conv to filter the data but it is having unexpected results. What would be the most effective way to do this?

Kind Regards,

Luc

 

[viscousflow]

Do you have access to Matlab? You can use the system identification toolbox. It can do all the work for you.

See: http://www.mathworks.com/company/events/webinars/wbnr54213.html?id=54213&p1=869915375&p2=869915393

 

[lucvh]

I can use mathscript within labview, as the brief for the project states that it should be coded in labview.