Quote:
Originally Posted by MisterG
is each of those four blocks is a separate PID
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They are separate closed-loop controllers. You can use PID if you like.
Block#1 (the top one) and Block#3 are identical (but separate) and should have similar tuning parameters.
Block#2 and Block#4 (the bottom one) are identical (but separate) and should have similar tuning parameters.
EDIT: Get one side working by tuning Block#1. Then use the same type of controller (and gains) to drive Block#3. Then add Block#2 and Block#4 and tune them to make the sides synchronous, using the same gains in each.
Quote:
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with sp being the command and pv being the feedback?
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Yes. sp is
Set
Point (command) and pv is
Process
Variable (feedback).
Quote:
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Did you just come up with this now or is this a scheme that you have known about for some time and if so do you know of any cases where this has been used successfully?
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Hat tip to Jared Russell.
Lengthy discussion at
this thread.
Here's a simple method for getting a nice smooth x(t) motion profile (if smoothness is desired).