Laboratory measurements of the effects of interlaminar slip on vortex-induced vibrations of the unbonded umbilical

Li, Fuheng; Guo, Haiyan; Gu, Honglu; An, Wanbo; Li, Peng; Liu, Zhen; Li, Xiaomin; Cui, Peng

doi:10.1016/j.ijmecsci.2021.106394

Cited by 8 publications

(1 citation statement)

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“…The umbilical cable is referred to as the lifeline of the ROV since it transmits the signal and working power of the ROV and the mothership deck operating system [12].But this architecture has flaws, the umbilical cable will produce vortex induced vibration (VIV) under the effect of electricity, which will cause it to continually deform. In this instance, the optical fiber continuously refracts the control signal between the ROV and the deck operating system, causing signal attenuation or even loss [13,14,15]. Nevertheless, the VIV phenomenon of umbilical cable is inevitable, and to reduce the transmission of control signals between the ROV and the deck operating system, the installation of an underwater control system on the ROV has become the first choice to solve the above problems.…”

Section: Introductionmentioning

confidence: 99%

Control optimization of ROV attitude stabilization system based on ETM

Jiang

Juan

Jin

et al. 2022

Preprint

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This study develops an event-triggered controller for the ROV attitude system. First, the dynamic modeling of ROV attitude control is performed. The three-dimensional dynamic equation for ROV attitude control is obtained by decoupling each degree of freedom, and the model for the ROV attitude stability control system is obtained by taking into account the influence of ROV hydrodynamics, ship movement, and umbilical cable vortex-induced vibration. The ROV attitude stability control controller is designed by using backstepping control and sliding mode control, the event trigger mechanism is added to optimize its control output, and the Volterra adaptive multi-step prediction algorithm is designed to predict the ship sinking time series in advance, and the condition parameters are provided for the event trigger mechanism in the AHC controller to improve the positioning accuracy of the attitude stability axial subsystem (AHC). The simulation findings demonstrate that the control strategy and prediction algorithm developed in this study can accomplish the control task and have a strong anti-interference ability by establishing varying degrees of sea conditions and advanced forecast time for simulation tests. Additionally, the event trigger mechanism optimizes the control law, better utilizes the output control signal's channel, and prevents the control output from acting improperly, all of which can reduce network bandwidth use.

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