Control Performance Simulation on Heave Compensation System of Deep-sea Mining Based on Dynamic Vibration Absorber

To ensure the safety and the production efficiency as well as the component lifetime of deep-sea mining system, a novel heave compensation system of deep-sea mining based on dynamic vibration absorber was proposed in the light of 5000m deep sea poly-metallic mining system of China in this paper. According to the work condition of heave compensation system, the response of deep-sea mining ship under random wave of sea state 4 in China’s deep sea poly-metallic mining field are numerically simulated in time domain. The proposed heave compensation system was simplified to a two-degree-of-freedom system stimulated by the displacement motion of the deep-sea mining ship and its dynamic model was built. Taking the minimum of the displacement variance of the proposed heave compensation system as the optimal object and considering the allowed displacement of the dynamic vibration absorber itself, the computation formula of the optimum parameters of dynamic vibration absorber for heave compensation system of deep-sea mining is derived. Thus the parameter of dynamic vibration absorber was determined and its effect on the performance index of the heave compensation system was simulated and compared. The dynamic vibration absorber with optimum parameters was simulated and tested on the test bench of double-storey mass-spring vibration system in the lab. The results of the example show that the performance of vibration control of the designed dynamic vibration absorber is satisfactory and the computational formulas given in the paper are effective. The results also verified that the heave compensator based on dynamic vibration absorber with the optimal parameters can have good performance of heave compensation and it is practical to isolate the lifting pipeline and its deployment platform from the vibration of the ship motion induced by the irregular wave with simplicity and less energy consumption. This work in the paper will be of great theoretical guidance in the optimum design of the dynamic vibration absorber for heave compensation system of deep-sea mining.

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Modeling and simulation of active-controlled heave compensation system of deep-sea mining based on dynamic vibration absorber

2009 International Conference on Mechatronics and Automation ◽

10.1109/icma.2009.5246738 ◽

2009 ◽

Cited By ~ 2

Author(s):

Liujun Li ◽

Shaojun Liu

Keyword(s):

Modeling And Simulation ◽

Deep Sea ◽

Compensation System ◽

Vibration Absorber ◽

Dynamic Vibration Absorber ◽

Dynamic Vibration

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Modeling of active heave compensation system of deep-sea mining based on dynamic vibration absorber and its H∞ robust control

2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering ◽

10.1109/cmce.2010.5610448 ◽

2010 ◽

Author(s):

Liujun Li ◽

Shaojun Liu

Keyword(s):

Robust Control ◽

Deep Sea ◽

Compensation System ◽

Vibration Absorber ◽

Dynamic Vibration Absorber ◽

Dynamic Vibration

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Optimization and analysis of a grounded type dynamic vibration absorber with lever component

Science Progress ◽

10.1177/0036850420959889 ◽

2020 ◽

Vol 103 (4) ◽

pp. 003685042095988

Author(s):

Yongjun Shen ◽

Zikang Xing ◽

Shaopu Yang ◽

Xianghong Li

Keyword(s):

Effective Mass ◽

Vibration Absorber ◽

Engineering Practice ◽

Control Performance ◽

Mass Ratio ◽

Dynamic Vibration Absorber ◽

Amplification Ratio ◽

Dynamic Vibration ◽

Optimum Parameters ◽

Auxiliary Mass

Dynamic vibration absorber (DVA) with large auxiliary mass has better control performance, but it is also more bulky. Therefore, the mass ratio (the ratio of auxiliary mass of DVA to mass of controlled object) is usually limited to make the DVA easy to install and suitable for engineering practice. In this paper a grounded type DVA with lever component is proposed, which aims to increase the effective mass and reduce unnecessary mass to improve control performance of the DVA. Firstly, the motion differential equations of the DVA are established and solved. Secondly, the optimum parameters are obtained based on H∞ and H2 optimization criterion. Then, the performances of the grounded type DVA equipped with and without the lever are investigated. Finally, the control performance of the DVA is compared with other three typical DVAs under H∞ and H2 criterion. In this type DVA there are no global optimum parameters, and larger frequency ratio will get better control performance. If the amplification ratio (the ratio of lever power arm to lever resistance arm) is greater than 1, the introduced lever will contribute to control performance of the DVA. Its control performance is better than those of other three typical DVAs. The use of the lever can increase the effective mass of the DVA, thereby improving the control performance of the DVA. The DVA can achieve good performance at small mass ratio by adjusting amplification ratio, which may provide theoretical basis for the design of new kinds of DVAs.

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