Particle swarming of sensor correction filters

Carter, J. J., Cooper, S. J., Thrift, E., Briggs, J., Warner, J., Ross, M. P. and Mow-Lowry, C. M. (2020) Particle swarming of sensor correction filters. Classical and Quantum Gravity, 37(20), 205009. (doi: 10.1088/1361-6382/abb32a)

Abstract

Reducing the impact of seismic activity on the motion of suspended optics is essential for the operation of ground-based gravitational wave detectors. During periods of increased seismic activity, low-frequency ground translation and tilt cause the Advanced LIGO observatories to lose ‘lock’, reducing their duty cycles. This paper applies modern global-optimisation algorithms to aid in the design of the ‘sensor correction’ filter, used in the control of the active platforms. It is shown that a particle swarm algorithm that minimises a cost-function approximating the differential root mean squared velocity between platforms can produce control filters that perform better across most frequencies in the control bandwidth than those currently installed. These tests were conducted using training data from the LIGO Hanford Observatory seismic instruments and simulations of the Horizontal Access Module Internal Seismic Isolation platforms. These results show that new methods of producing control filters are ready for use at LIGO. The filters were implemented at LIGO’s Hanford Observatory, and use the resulting data to refine the cost function.

• Item Type: Articles
• Keywords: Sensor correction, seismic isolation, particle swarm.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Briggs, Mr Joseph
• Authors: Carter, J. J., Cooper, S. J., Thrift, E., Briggs, J., Warner, J., Ross, M. P., and Mow-Lowry, C. M.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Classical and Quantum Gravity
• Publisher: IOP Publishing
• ISSN: 0264-9381
• ISSN (Online): 1361-6382
• Published Online: 21 September 2020
• Copyright Holders: Copyright © 2020 The Authors
• First Published: First published in Classical and Quantum Gravity 37(20): 205009
• Publisher Policy: Reproduced under a Creative Commons License