The head on situation and overtake situation can be regarded as a special case of cross situation ; 5 through the comprehensive analysis of all kinds of schemes , to determine a best scheme of radars collision avoidance , which may be applied to the following three circumstances : cross situation , head on situation as well as overtake situation , thus to take any measures to alter course , slow down or slow down with alteration ; 6 through the analysis of a special situation , to study the method how to calculate the range of dangerous angle of collision avoidance ; 7 through the statistics of action of collision avoidance , to find out the rules of taking actions to revise the " best scheme " ; 8 the principle and method of optimization are presented 6 、對(duì)一種特殊的會(huì)遇情況:位于轉(zhuǎn)向不變線或其平行線上的來船的dcpa和tcpa的變化作分析,探討出“轉(zhuǎn)向忌諱角”的求取方法,在避碰方案中應(yīng)避免使用“轉(zhuǎn)向忌諱角。 ”在多船避讓時(shí),如采取一次轉(zhuǎn)向行動(dòng)讓清所有船舶,則該理論的應(yīng)用將使避碰方案更加完美。 7 、對(duì)駕駛員的避碰行為作調(diào)查統(tǒng)計(jì)(交叉相遇) ,得出駕駛員在交叉相遇局面中的行動(dòng)幅度和行動(dòng)時(shí)機(jī)(距離)的統(tǒng)計(jì)數(shù)據(jù),得到行動(dòng)幅度和行動(dòng)時(shí)機(jī)的平均值,對(duì)“最佳方案”進(jìn)行修正。
The research works of this paper can be mainly demonstrated in the following aspects : 1 new model of dangerous degree of collision avoidance ( ddca ) was studied to determinate the best scheme of collision avoidance ; 2 ten factors , which affect the avoiding effect , were discussed in details ; 3 changing rules of dcpa and tcpa were discussed , according to the international collision avoidance rules at sea , under the following three circumstances : cross situation , head on situation , as well as overtake situation ; 4 to focus the discussion on cross situation 2 、確定影響避讓效果的十大因素,將其產(chǎn)生的影響以行動(dòng)時(shí)機(jī)提前量來消除。 3 、將船舶會(huì)遇局面按國際海上避碰規(guī)則所劃分的交叉相遇局面、對(duì)遇局面、追越局面三種局面分別討論dcpa和tcpa及其變化規(guī)律,結(jié)合船舶碰撞危險(xiǎn)度評(píng)價(jià)并確立最佳避讓方案。 4 、將交叉相遇局面作為本文的研究重點(diǎn),對(duì)遇局面和追越局面可以視作交叉相遇局面的特殊情況來處理。