TY - JOUR
T1 - Contactless control of suspended loads for offshore installations
T2 - Proof of concept using magnetic interaction
AU - Atzampou, Panagiota
AU - Meijers, Peter C.
AU - Tsouvalas, Apostolos
AU - Metrikine, Andrei V.
PY - 2024
Y1 - 2024
N2 - Current offshore wind turbine installation and positioning methods require mechanical equipment attached on the lifted components and human intervention. The present paper studies the development of a contactless motion compensation technique by investigating a magnetically controlled pendulum. The technique involves the interaction of a magnetic pendulum with an electromagnetic actuator. Two control modes are considered: the imposition of a desired motion to the mass and the motion attenuation of a prescribed pivot excitation. The numerical model is validated and calibrated against experiments and demonstrates excellent predictive capabilities. The control exerted is effective for a broad range of excitation frequencies and amplitudes. Important parameters associated with the performance of the technique such as the separation distance of the magnets and the saturation of the controller are identified. The controllability regions for effective control depending on the characteristics of the excitation are derived. The force amplitude of the contactless actuator is comparable to currently-used active tugger line control systems, but with the additional advantage of both attractive and repulsive forces. The findings of this paper illuminate the path for the further development of a non-contact control technique which has the potential to increase the efficiency of offshore wind installations.
AB - Current offshore wind turbine installation and positioning methods require mechanical equipment attached on the lifted components and human intervention. The present paper studies the development of a contactless motion compensation technique by investigating a magnetically controlled pendulum. The technique involves the interaction of a magnetic pendulum with an electromagnetic actuator. Two control modes are considered: the imposition of a desired motion to the mass and the motion attenuation of a prescribed pivot excitation. The numerical model is validated and calibrated against experiments and demonstrates excellent predictive capabilities. The control exerted is effective for a broad range of excitation frequencies and amplitudes. Important parameters associated with the performance of the technique such as the separation distance of the magnets and the saturation of the controller are identified. The controllability regions for effective control depending on the characteristics of the excitation are derived. The force amplitude of the contactless actuator is comparable to currently-used active tugger line control systems, but with the additional advantage of both attractive and repulsive forces. The findings of this paper illuminate the path for the further development of a non-contact control technique which has the potential to increase the efficiency of offshore wind installations.
KW - Active vibration control
KW - Contactless control
KW - Magnetic pendulum
KW - Motion manipulation
KW - Offshore wind installation
KW - PID control
UR - http://www.scopus.com/inward/record.url?scp=85183578084&partnerID=8YFLogxK
U2 - 10.1016/j.jsv.2024.118246
DO - 10.1016/j.jsv.2024.118246
M3 - Article
AN - SCOPUS:85183578084
SN - 0022-460X
VL - 575
JO - Journal of Sound and Vibration
JF - Journal of Sound and Vibration
M1 - 118246
ER -