Control system for the seismic attenuation system (SAS) in TAMA300
Abstract
A new seismic isolation system, TAMA Seismic Attenuation System (TAMA-SAS), was installed to TAMA300 in order to improve the sensitivity at low frequencies. Inertial damping is one of the hierarchical control systems of the TAMA-SAS which are employed to give full play to its ability. We have established two servo loops to control the Inverted Pendulum (IP) which composes the SAS. One is the servo loop using LVDT position sensors to keep the position of the IP. The other is the inertial damping which uses accelerometers to control the inertial motion of the IP for the horizontal direction. The fluctuation of the IP was reduced using our servo system. In addition, reduction of angular and longitudinal fluctuation of the mirror was also confirmed. These results indicate that the control for the IP properly works and the isolation performance of the TAMA-SAS was improved.
Additional Information
© 2008 IOP Publishing Ltd. This work was supported by the Grant-in-Aid for Scientific Research of the Ministry of Education, Culture, Sports, Science and Technology (09NP0801 in Creative Scientific Research and 415 in Priority Areas). Developments of the TAMA-SAS were supported by the Advanced Technology Center of National Astronomical Observatory of Japan and the U.S. National Science Foundation under Cooperative Agreement No. PHY-0107417.Additional details
- Eprint ID
- 13804
- Resolver ID
- CaltechAUTHORS:AGAjpcs08
- 09NP0801
- Scientific Research of the Ministry of Education, Culture, Sports, Science and Technology
- 415
- Scientific Research of the Ministry of Education, Culture, Sports, Science and Technology
- PHY-0107417
- Advanced Technology Center of National Astronomical Observatory of Japan
- PHY-0107417
- NSF
- Created
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2009-04-03Created from EPrint's datestamp field
- Updated
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2022-07-12Created from EPrint's last_modified field