中文摘要：

针对运载火箭发射飞行安全控制任务的核心问题——地面保护目标，提出了地面保护目标相对危险度确定算法。此算法将地面保护目标相对危险度的度量考虑为当前时刻保护目标与火箭预示落点的距离、火箭残骸碎片散布和毒气扩散分布、保护目标的人口分布、保护目标重要设施的代价函数，实现了目标的危险程度综合评估。通过将该算法应用于某对策分析及决策支持系统，实现了运载火箭安全控制决策中对地面保护目标危险程度的定量描述，为安控人员实施火箭安全控制决策提供了有效的支持。

英文摘要：

For the core problem of ground safety control-the relative criticality estimation of ground protected objects in the rocket launch process, the relative criticality algorithm of ground protected objects is proposed in the paper. This algorithm transforms the measurement of the relative criticality for ground protected objects into cost function which considers the rocket＇ s current fall point, the distribution of rocket＇s wreckage and poison gas, the population and the important establishments of the objects, realize the comprehensive evaluation of the relative criticality for different objects. To verify the effectiveness of this algorithm, it is applied to a decision support system to achieve the quantitative evaluation of the ground protected objects in several rocket launching tasks. This algorithm provides quantificational judgment evidence for rocket safety control officers in effective decision-making for safety control of the rocket launching.