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Message ID: 502     Entry time: Wed Feb 16 21:29:17 2011
Author: tara 
Type: Notes 
Category:  
Subject: perl script for SLOWDC PID control added 

A perl script/ an medm screen are created for SLOWDC PID control. The gain is not optimized yet. Some debugging might be needed.

The script for SLOW_PID.pl is similar to rcav_PID_2011_01_25.pl. I just changed the channel names for SLOWDC.

The process is C3:PSL-FSS_FAST

The actuator is C3:PSL-FSS_SLOWDC

Setpoint is C3:PSL-FSS_SLOWPID_SETPOINT (set to 0)

and other parameters follow the form of C3:PSL-FSS_SLOWPID_...

 

The perl scripts can be executed on the sun machine, but the result is abnormal. I tried to adjust P gain,

but for either signs I chose for Kp, SLOWDC seems to rail, instead of being steady at a certain value.

I'll check this later, for now it's not very important, since another loop for SLOWDC is also working, and

we can lock the cavity for a long time without SLOWDC feedback.

 

note for thermal PID

      RCAV   ACAV

P        -0.9         -0.9

I       -0.006      -0.0028

D       0                0

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