I am taking another look at what steps in lock acquisition take a very long time. See Georgia's previous alog on this: 76398
I noticed some of the power up steps seem to take longer than they should. I found some timers that are longer than necessary, so I am shortening them.
- Reduced 30 sec timer to 10 sec in "Power 10 W" > this is a timer to wait on ASC boost engagements that have a 1 and 6 second ramp time respectively
- loosened move spots ADS convergence thresholds from 0.6 to 1.2 > I tightened these thresholds by a factor of 10 previously (from 6 to 0.6)
- I combined a few steps of "lownoise ASC": changing the MICH gains with CHARD P, and doing all DHARD P and Y controls in one step reducing a few of the timer waits that were 5 seconds each
- I noticed the AS A yaw offset tRamp is set to 20 seconds in lownoise ASC, but then the step only waits 10 seconds before moving on, so now the tramp is set to 10 seconds
- I increased the Max Power ADS convergence threshold, was 0.001 is now 0.002
- I reduced the thermal waits in Max Power from 30 to 20
Just a note about many of the longer waits and tight convergence thresholds: powering up to 75 W was sometimes a very shaky process that required a much tighter convergence in the soft loops, otherwise runaway instabilities would often cause locklosses. We have previously relaxed some of these tight constraints to speed up lock but we didn't catch them all. This should take care of more of them (but maybe not all).
I shortened lownoise ASC further. All the ASC loop changes happen in one step. The damping loops happen in two separate steps-- the combination of the damping loops the last time we made changes to this state caused problems so those still need to be separate.This changed caused a lockloss. I have reverted the guardian code to break up these steps.