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Altera_Forum's avatar
Altera_Forum
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14 years ago

PI controller in VHDL

I'm trying to implement a PI controller in VHDL. where i tried a lot but i failed Please, can any one help me to achieve this task where i'm new in this field.
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

i would like to tell you the equation of PI controller that i used:

u(k)=u(k-1) + err(k)*(kp +(ki*ts/2)) + err(k-1) * ( (ki*ts/2) - kp)

where:

u : is the output of controller.

err: error signal that injected to the controller.

kp: proportional constant.

ki : integral constant.

ts : sampling time.