Differences between revisions 112 and 113
 ⇤ ← Revision 112 as of 2018-02-05 14:38:51 → Size: 7279 Editor: KokiOkutomi Comment: ← Revision 113 as of 2018-02-05 14:49:38 → ⇥ Size: 7392 Editor: KokiOkutomi Comment: Deletions are marked like this. Additions are marked like this. Line 38: Line 38: * Converted displacement [um] = 3.052e-4 [V/cnt] / H_{GEO}(ω) / (gainPreamp) x (DC cutoff) x 1/s (vel2disp)

# Type-A Tower ETMX Specification

## IP

### Geophone (GEO)

#### Frequency response

Geophone's frequency response to the ground velocity:

• Ge: Generator constant [V/(m/s)]
• η: Intrinsic damping ratio
• ω0: Resonant angular frequency [rad/s]
 Sensor S/N Generator constant (nominal) [V/(m/s)] Damping ratio (estimated) Resonant frequency [Hz] GEO H1 #11 282.26 0.34 1.07 GEO H2 #12 282.30 0.315 1.065 GEO H3 #13 286.47 0.27 1.31

#### Noise

 Sensor Noise [m/rtHz] @ 0.1 Hz Noise [m/rtHz] @ 10 Hz GEO H1 8e-9 3e-13 GEO H2 8e-9 3e-13 GEO H3 1e-8 3e-13

#### Calibration

• Converted displacement [um] = 3.052e-4 [V/cnt] / H_{GEO}(ω) / (gainPreamp) x (DC cutoff) x 1/s (vel2disp)

### LVDT

 Sensor Efficiency [um/cnt] LVDT H1 -0.258 LVDT H2 -0.252 LVDT H3 -0.233

### Actuator polarization

Polarity is determined so that an +offset at the COILOUTF applies +yaw force in each actuator.

• COIL H1: negative
• COIL H2: negative
• COIL H3: positive

### Diagonalization matrix

• ACC2EUL
 H1 H2 H3 To: 0.6440 -0.1725 -0.4714 Long. 0.1725 -0.6440 0.4714 Trans. 0.5635 0.5635 0.5635 Yaw
• LVDT2EUL
 H1 H2 H3 To: 0.6666 -0.3333 -0.3333 Long. 0 -0.5774 0.5774 Trans. 0.5612 0.5612 0.5612 Yaw
• EUL2COIL
 Long. Trans. Yaw To: 1. 0 0.5940 H1 -0.5000 -0.8660 0.5940 H2 -0.5000 0.8660 0.5940 H3

### Stepper motor

 Epics channel name: K1:STEPPER_EXV_IP Driver IP address: 10.68.150.46 Motor 0 Motor 1 Motor 2 Motor 3 Motor 4 Motor 5 F0 Yaw IP H1 IP H2 IP H3

## GAS

### LVDT

 Sensor Efficiency [um/cnt] F0 LVDT GAS -0.172 F1 LVDT GAS -0.215 F2 LVDT GAS -0.243 F3 LVDT GAS -0.225 BF LVDT GAS 0.204

### Fishing Rod (stepper motor)

 Epics channel name: K1:STEPPER_EXV_GAS Driver IP address: 10.68.150.45 Motor 0 Motor 1 Motor 2 Motor 3 Motor 4 Motor 5 F0 GAS F1 GAS F3 GAS BF GAS F2 GAS

#### Movable range

• F0 GAS: 6 mm (± 3 mm)
• F1 GAS:
• F2 GAS:
• F3 GAS:
• BF GAS: full range (11 mm)

## BF

### LVDT (BF Damper)

 Sensor Efficiency [um/cnt] LVDT V1 -0.3785 LVDT V2 0.3852 LVDT V3 0.3902 LVDT H1 0.4060 LVDT H2 -0.3821 LVDT H3 -0.3629

Note: The polarities are determined to output positive signals when the BF shifts respectively to +vertical/+yaw direction for Vertical/Horizontal LVDTs.

### Actuator polarization

Polarity is determined so that an +offset at the COILOUTF applies +yaw force in each actuator.

• COIL V1: positive
• COIL V2: positive
• COIL V3: negative
• COIL H1: positive
• COIL H2: negative
• COIL H3: negative

Note: Polarity may change when connecting the secondary coil to the cable. This configuration is confirmed on [2017.10.27]

### Diagonalization matrix

• LVDT2EUL
 V1 V2 V3 H1 H2 H3 To: 0 0 0 -0.6667 0.3333 0.3333 Long. 0 0 0 0 0.5774 -0.5774 Trans. 0.3333 0.3333 0.3333 0 0 0 Vert. 0.9158 0.9158 -1.8315 0 0 0 Roll 1.5861 -1.5861 0 0 0 0 Pitch 0 0 0 0.8170 0.8170 0.8170 Yaw
• EUL2COIL
 L T V R P Y To: 0 0 1. 0.1820 0.3152 0 V1 0 0 1. 0.1820 -0.3152 0 V2 0 0 1. -0.3640 0 0 V3 -1 0 0 0 0 0.4080 H1 0.5 0.8660 0 0 0 0.4080 H2 0.5 -0.8660 0 0 0 0.4080 H3