[Kokeyama, Aritomi]

To check the behavior of MCo actuator, we applied +10000 count offset to each actuator (K1:VIS-MCO_TM_COILOUTF_H1-4_OFFSET) and measured pitch and yaw motion of MCo by oplev. The result is as follows.

H1 P: +2.3 Y: +26.7
H2 P: -4.4 Y: +28.4
H3 P: -0.9 Y: -19.5
H4 P: +5.9 Y: -20.4
(Unit is urad)

Yaw motions are kind of similar, but pitch motions are different so much.
The reason is not identified yet. This result means that we cannot balance pitch and yaw motion at the same time.

To balance the yaw motion, we adjusted K1:VIS-MCO_TM_COILOUTF_H1-4_gain.
The filter gain is as follows.

F1: 1 F2: -0.94 F3: 1.6 F4: -1.43

With these parameters, we applied oscillation to pitch, yaw, length motion of MCo and measured pitch and yaw motion by oplev.
The result is as follows.

Applied Oscillation: 0.4 Hz, AMP 5000, SIN 1.0
P to P, Y: 17, < 1
Y to P, Y: 9 , 105
L to P, Y: 5 , 20
(Unit is urad, peak to peak value)

Coupling from pitch to yaw is small, so we'll use only pitch for WFS measurement for now.