极限海况下动力定位船舶推力分配推进器饱和协议

Thruster saturation protocol for thrust allocation for dynamic positioning of vessels in extreme sea conditions

极限海况下,船舶动力定位系统的多个推进器达到饱和状态,此时以最小功率消耗为优化目标的传统推力分配策略并不能充分发挥推进系统的能力,影响船舶定位性能。为了提高船舶在极限海况下动力定位推力分配策略的适应性,本文提出一个饱和协议优化推力分配策略,提高应对所需剧烈变化的控制推力的反应速度,并给出更准确的推力分配结果,通过对一艘半潜式海洋平台在极限海况下的时域仿真验证了该优化策略的有效性。

In extreme conditions,single or multiple thrusters in the dynamic positioning system(DPS)are usually in a saturated operation state.At this time,the conventional thrust allocation strategy cannot fully utilize the potential of the propulsion system and affects the positioning performance of the vessel.In order to improve the adaptability of the thrust allocation strategy in DPS of vessels in extreme operating conditions,the conventional thrust allocation strategy was optimized in this paper by proposing a novel saturation protocol,which can quickly respond to the drastic changes in the required control force,and can give a more reasonable thrust allocation result.The effectiveness of the optimized strategy was verified by time-domain simulation of a semi-submersible offshore platform in extreme operating sea conditions.