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Control system for the seismic attenuation system (SAS) in TAMA300

Agatsuma, K. and Takahashi, R. and Arai, K. and Tatsumi, D. and Fukushima, M. and Yamazaki, T. and Fujimoto, M.K. and Arase, Y. and Nakagawa, N. and Takamori, A. and Tsubono, K. and Kuroda, K. and Ohashi, M. and DeSalvo, R. and Bertolini, A. and Márka, S. and Sannibale, V. (2008) Control system for the seismic attenuation system (SAS) in TAMA300. Journal of Physics: Conference Series, 122 . 012013. ISSN 1742-6596. https://resolver.caltech.edu/CaltechAUTHORS:AGAjpcs08

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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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1088/1742-6596/122/1/012013DOIUNSPECIFIED
http://www.iop.org/EJ/abstract/1742-6596/122/1/012013/PublisherUNSPECIFIED
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.
Funders:
Funding AgencyGrant Number
Scientific Research of the Ministry of Education, Culture, Sports, Science and Technology09NP0801
Scientific Research of the Ministry of Education, Culture, Sports, Science and Technology415
Advanced Technology Center of National Astronomical Observatory of JapanPHY-0107417
NSFPHY-0107417
Record Number:CaltechAUTHORS:AGAjpcs08
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:AGAjpcs08
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:13804
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:03 Apr 2009 21:59
Last Modified:03 Oct 2019 00:44

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