目标船运动参数及d_(CPA)、t_(CPA)决策模型

Decision-making model of d_(CPA),t_(CPA) and object's movement parameter

介绍了根据目标船方位和距离变化信息或本船与目标船航向和航速信息确定目标船相对运动速度和方向的决策模型,目标船航向和航速决策模型,目标船初始dCPA和tCPA决策模型,本船转向后dCPA和tCPA决策模型,目标船转向后dCPA和tCPA决策模型及目标船方位和距离变化的决策模型,并给出了相应的计算实例.所给出的不同情况下的dCPA决策模型,不仅能确定两船的最小会遇距离,还可直接根据其符号判断相对运动关系(过船首或船尾).本船或目标船转向后的dCPA、tCPA决策模型,不受初始dCPA等于0的限制,可适用于任何会遇情况,是船舶智能避碰决策与控制系统中转向避碰决策子系统和复航决策子系统的重要组成部分.

Decision-making models of d_(CPA),t_(CPA) and movement parameters of target are foundations of intelligent decision-making and controlling system of vessel collision avoidance. The models of target's relative speed and direction based either on radar plotting or on own ship's and target's course and speed, initial d_(CPA) and t_(CPA), d_(CPA) and t_(CPA) after altering own ship or target's course, target's distance and relative bearing based on the initial relative position and relative speed and course of the target are presented in this paper. The model of d_(CPA) can determine the value of d_(CPA) and whether the target ship passes from fore or aft end of the own, it's applicable to all conditions whether the initial d_(CPA) is equal to zero or not.