IS IT REALLY WORTHY TO IMPLMENT A PID CONTROLLER ON A FPGA?

[eltonjohn]

I have this controller for GALVANOMETERS and i decided to do all the processing hardwired . So i need a PID controller to implement in VHDL .So i search the web .Found just one project and that University were not disclosign the VHDL code ..Big DEAL i have the discrete equations is a matter of 1 hour of coding .But then .Most applications of this type of controller are low speed . So why implement this with a FPGA
when a DSP is more than enough .. Most of the appplication are mechanical control we khow that this things are slow .. Even a TURBO running at 100k rpm a sec is still slow .I still don't see an app where an operating point was required in matters of nanoseconds !
So can i conclude that DSP's are PIDs hunting ground!

 

[cube007]

Hello eltonjohn,

Using a PID algorithm for controlling a galvanometer in a digital design (DSP/FPGA) is a little bit overstated. A PID can be easier implemented in analogue. For example the control algorithm of the digital scanner amp from Cambridge Technology does not use PID. There are some other algorithms which will take advantage of a digital design like a dead-beat controller or a state controller.
Some months ago I planed to start a project for developing such a controller but the amount was too big for a small project. It’s a very interesting matter and I hope you will get some good results.


Bye,
cube007