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VIS (EY)
takahiro.yamamoto - 21:45 Sunday 22 December 2024 (32077) Print this report
PAY_TRIPPED on ETMY due to MN_V2

ETMY went to PAY_TRIPPED at 20:28:58 JST.

It was caused by a loud glitch on the photosensor for MN_V2 as shown in Fig.1 and Fig.2 which is just a zoom up of Fig.1.
Because other sensors (V1, V3, H1, H2, H3) didn't detect such a loud glitches, it shouldn't be a real motion.

I have no enough time to check more detail today. So I keep it in PAY_TRIPPED with disabling voice notification by guardian.

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shinji.miyoki - 8:07 Monday 23 December 2024 (32078) Print this report

Although this is as expected, EY GASs move a lot after the trip. 

By the way, ~ 0.6-hour oscillation in this EY seems to be the same kind of phenomenon in healthy? IX tower GASs with ~1 day oscillation?

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takafumi.ushiba - 9:02 Monday 23 December 2024 (32080) Print this report

Somehow, MNV2 photosensor signals came back to the nominal values.
I have no idea whiy but ETMY can reach LOCK_ACQUISITION state now without problems.
We need to carefully monitor the signals.

takafumi.ushiba - 18:01 Monday 23 December 2024 (32100) Print this report

ETMY was TRIPPED again due to MNV2 photosensor.
So, I disabled MNV2 photosensors and modified the matrix from fig1 to fig2.
Though roll damping is not engaged at ALIGNED state, this modification seems to work at this moment (this modification doesn't affect to the LOCK_ACQUISITION state because V2 photosensors are not used at LOCK_ACQUISITION state).

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