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为了给飞机提供一条能满足多种指标要求的最优飞行轨迹，针对变分最优理论难以求解多指标优化问题，提出了命名为多次优化的方法，即将多要求的优化任务分成先后相继的多次任务，每次任务中选取一种不能边界转化的要求作为最优性能指标，而其余要求转化为边界条件．利用这一方法以时间、转弯次数、转弯角度为最优性能指标给出了终端区最优飞行轨迹的一般特征．
In order to provide the aircraft with an optimal trajectory that can meet a variety of index requirements, it is difficult to solve the multi-index optimization problem based on the variational optimal theory. A multi-objective optimization method is proposed, which divides the multi-required optimization tasks into successive Multiple tasks, each mission to choose a can not be bound to the requirements of the conversion as the optimal performance indicators, while the remaining requirements into the boundary conditions. By using this method, the general characteristics of the optimal flight path of the terminal area are given by taking the time, turn number and turn angle as the optimal performance indexes.