Vibration suppression method and system for flexible marine riser

A vibration suppression and marine technology, which is applied in the direction of control/regulation system, mechanical oscillation control, non-electric variable control, etc., can solve the problems that the vibration suppression of marine risers cannot be realized, and achieve the effect of improving the operation accuracy

Active Publication Date: 2021-05-14
JIANGNAN UNIV
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Problems solved by technology

[0004] The invention provides a vibration suppression method for a flexible marine riser and a vibration suppression system for a fle

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  • Vibration suppression method and system for flexible marine riser
  • Vibration suppression method and system for flexible marine riser
  • Vibration suppression method and system for flexible marine riser

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[0052] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0053] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments of some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0054] It should be noted that the terms "fir...

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Abstract

The invention relates to the technical field of vibration suppression of flexible marine risers, and particularly discloses a vibration suppression method for a flexible marine riser. The method comprises the following steps: modeling a flexible marine riser based on boundary disturbing force and spatial distribution disturbing force to obtain a marine riser model; acquiring the boundary state information of the flexible marine riser; constructing a boundary sliding mode anti-saturation controller; judging whether an actuator control value reaches an actuator saturation upper limit or not according to the output of the boundary sliding mode anti-saturation controller; if so, designing an auxiliary system according to the boundary state information of the flexible marine riser and the part exceeding the saturation upper limit; and when it is determined that the flexible marine riser is stable, acquiring the gain value range of the boundary sliding mode anti-saturation controller. The invention further discloses a vibration suppression system for the flexible marine riser. According to the vibration suppression method for the flexible marine riser, the influence of saturation nonlinearity of the actuator and external unknown disturbance on the stability of the flexible marine riser can be eliminated.

Description

technical field [0001] The invention relates to the technical field of vibration suppression of flexible marine risers, in particular to a vibration suppression method for flexible marine risers and a vibration suppression system for flexible marine risers. Background technique [0002] Flexible rods are widely used in robotics, aerospace, marine, and industrial fields due to their advantages of light weight, high precision, low energy consumption, and large operating space. However, due to the low stiffness of flexible materials, when subjected to external forces, It is easy to generate long-term continuous vibration, which not only affects the working accuracy and efficiency of the flexible system, but also accelerates the aging of the flexible structure, shortens the service life of the flexible material, and causes safety hazards and economic losses. Therefore, how to effectively suppress the vibration of flexible systems is of great significance for applications in aero...

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Application Information

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IPC IPC(8): G05D19/02E21B17/01
CPCG05D19/02E21B17/01
Inventor 楼旭阳马艺飞
Owner JIANGNAN UNIV
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