基于四元船舶领域的船舶碰撞危险度模型

Ship Collision Risk Index Model Based on Quaternion Ship Domain

文中提出基于四元船舶领域的碰撞危险度模糊评价模型.依据四元船舶领域确定安全距离边界,并结合碰撞危险检测圆和检测线判断碰撞危险;选取最近会遇距离、最近会遇时间、船舶间距离、本船坐标系下相对航向以及船速比作为碰撞危险评价指标,利用模糊理论得到船舶碰撞危险度计算模型.在追越、对遇以及交叉相遇局面下进行仿真验证.结果表明:提出的模型能够有效表征船舶之间的碰撞危险程度以及变化趋势.

A fuzzy evaluation model of collision risk based on four-element ship field was proposed.The safety distance boundary is determined according to the four-element ship field,and the collision danger was judged by combining the collision danger detection circle and detection line.The nearest encounter distance,the nearest encounter time,the distance between ships,the relative heading in the ship’s coordinate system and the ship speed ratio were selected as collision risk evaluation indexes,and the calculation model of ship collision risk was obtained by using fuzzy theory.Simulation verification was carried out in the situations of overtaking,confrontation and cross-encounter.The results show that the proposed model can effectively represent the collision risk degree and changing trend between ships.