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

ETMX Specification

IP

Ifconfig_ETMXv1.png

Accelerometer (ACC)

  • ACC H1 (SN7): -5.288 [(um/s^2)/cnt]
  • ACC H2 (SN8): 5.830 [(um/s^2)/cnt]
  • ACC H3 (SN5): -5.289 [(um/s^2)/cnt]

calibACC_sn7_20171016.png calibACC_sn8_20171016.png calibACC_sn5_20171017.png

LVDT

  • LVDT H1: -0.258 [um/cnt]
  • LVDT H2: -0.252 [um/cnt]
  • LVDT H3: -0.233 [um/cnt]

calibLVDT_ETMX_IPH1_20171012.png calibLVDT_ETMX_IPH2_20171012.png calibLVDT_ETMX_IPH3_20171012.png

Actuator polarization

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

  • COIL H1:
  • COIL H2:
  • COIL H3:

Diagonalization matrix

  • ACC2EUL

H1

H2

H3

To:

0.6440

-0.1726

-0.4714

Long.

0.1726

-0.6440

0.4714

Trans.

0.6833

0.6833

0.6833

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

-0.5

-0.8660

0.5940

H2

-0.5

0.8660

0.5940

H3

GAS

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

calibLVDT_ETMX_F0GAS20171012.png calibLVDT_ETMX_F1GAS20170907.png calibLVDT_ETMX_F2GAS20170822.png

calibLVDT_ETMX_F3GAS20170803.png calibLVDT_ETMX_BFGAS20170725.png

BF

BFconfig_ETMX.png

  • LVDT V1:
  • LVDT V2:
  • LVDT V3:
  • LVDT H1:
  • LVDT H2:
  • LVDT H3:

Diagonalization matrix

  • LVDT2EUL

V1

V2

V3

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

-0.5

-0.8660

0.5940

H2

-0.5

0.8660

0.5940

H3

KAGRA/Subgroups/VIS/TypeA/ETMX (last edited 2022-03-07 11:29:59 by hiromi.yasui)