推力器失效形式对DP-2级动力定位系统最优作业方向影响     

刘翰林  王磊  闫芳 《海洋工程》2012,30(2):110-115

以3 000 m水深DP-2级动力定位半潜平台为算例,研究在风浪流同向作用下,平台在各个角度下所能抵抗的最大外界环境力,得到最优作业方向。在此角度下,着重分析当不同推力器失效时,对动力定位能力的影响。得到一般规律,并推广到一般平台。  相似文献   

锚泊辅助动力定位系统艏向控制模式研究     

邹刚  王磊  刘翰林 《海洋工程》2013,31(5):11-17

锚泊辅助动力定位系统是一种将锚泊定位与动力定位结合起来的新型定位方式。对该系统的艏向控制模式进行了研究。在该模式下,控制系统将只对平台的艏向运动施加约束。同时对平台在该模式下的定位进行了时域模拟,并与锚泊定位和水平面三自由度均施加约束的全定位模式进行了对比。结果表明,在一般海况下,相比锚泊定位,该定位模式能显著提高平台的艏摇控制精度;相比全定位模式,该定位模式消耗的功率更小、更经济。艏向控制模式是锚泊辅助动力定位系统的一种工作模式,在相应海况条件下采取该定位模式,能够实现精确和经济的定位。  相似文献   

On the use of the capability polar plots program for dynamic positioning systems for marine vessels   总被引：2，自引：0，他引：2  

Ayman B. Mahfouz  Hussein W. El-Tahan 《Ocean Engineering》2006,33(8-9):1070-1089

As the capability of polar plots becomes better understood, improved dynamic positioning (DP) systems are possible since the control algorithms greatly depend on the accuracy of the aerodynamic and hydrodynamic models. The measurements and estimation of the environmental disturbances have an important role in the optimal design and selection of a DP system for a marine vessel. The main objective of this work is to present a new software program capable of estimating the environmental forces, thrusters capability calculations, and capability polar plots for marine vessels. A flowchart illustrating the logic and data flow of a developed software program, the Capability Polar Plot Program (CPPP), and the estimated results for two case studies for a scientific drilling vessel and a survey vessel are presented. It is obvious from the obtained results that the developed program has a future potential for the estimation of the Capability Polar Plots for marine vessels. Moreover, the developed software program would be considered as a marine tool for the thrusters' selection and their configuration for marine vessels and floating production units for the Oil and Gas industries.  相似文献