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Compact isolation of a large mirror at low frequency
Sider, Ameer; Dehaeze, Thomas; Watchi, J et al.
2022
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Keywords :
Seismic Noise; Isolation, Active Control; Decoupling; Inertial Sensor; Einstein Telescope
Abstract :
[en] This study presents a compact isolation system of a large mirror at low frequency. The work is carried out in the framework of the E-TEST project to investigate a new concept of design for the future Einstein Telescope (Europe's next-generation gravitational-wave detector). The isolation system combines an active inertial platform, a passive inverted pendulum platform, and a multi-cascaded pendulum in one system. Given that, the study addresses the isolation system design, its dynamics, and the applied control strategy. For the control strategy, a decoupling method based on a geometric approach is first applied to reduce the magnitude of the off-diagonal elements of the transfer matrix. Then the controller is applied in the Cartesian frame based on the loop shaping method. The simulation results show that the seismic noise could be reduced by about 3 orders of magnitude at 1 Hz in the horizontal and vertical directions when the control is applied. It is also shown that the control is still performing well despite of the residual coupling of the inertial sensor.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Sider, Ameer  ;  Université de Liège - ULiège > Aérospatiale et Mécanique (A&M)
Dehaeze, Thomas ;  Université de Liège - ULiège > Aérospatiale et Mécanique (A&M) ; ESRF -European Synchrotron Radiation Facility Avenue des Martyrs, Grenoble, France
Watchi, J;  Free University of Brussels, Beams, Brussels, Belgium
Lakkis, Mouhamad Haidar  ;  Université de Liège - ULiège > Aérospatiale et Mécanique (A&M) ; Free University of Brussels, Beams, Brussels, Belgium
Jamshidi, R;  Université de Liège, PML -Precision Mechatronics Laboratory, Liège, Belgium
Amorosi, Anthony  ;  Université de Liège - ULiège > Aérospatiale et Mécanique (A&M) ; Free University of Brussels, Beams, Brussels, Belgium
Amez-Droz, Loïc  ;  Université de Liège - ULiège > Aérospatiale et Mécanique (A&M) ; Free University of Brussels, Beams, Brussels, Belgium
Teloi, Mayana ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Active aerospace structures and advanced mechanical systems ; Free University of Brussels, Beams, Brussels, Belgium
Collette, Christophe  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Active aerospace structures and advanced mechanical systems ; Free University of Brussels, Beams, Brussels, Belgium
Language :
English
Title :
Compact isolation of a large mirror at low frequency
Publication date :
12 September 2022
Event name :
30th International Conference on Noise and Vibration engineering (ISMA2022)
Event place :
Belgium
Event date :
12-14 September 2022
Available on ORBi :
since 16 November 2024

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