铱星星座效能评估BDP-ADC模型

为解决传统模型在度量时间连续状态有限的星座效能时存在的困难,构建一种基于生灭过程的评估铱星效能的BDP-ADC模型.首先,利用生灭过程描述星座状态的转移过程,得出该状态转移过程存在极限分布,并定义铱星的可用度;其次,结合Kolmogorov前进方程来衡量星座在任务执行过程中的可信度;再次,根据建立的铱星星座能力评估指标体系,利用熵权法求得指标的权重,结合全概率公式对星座能力进行表征;最后,利用BDP-ADC效能评估模型得出铱星星座效能动态关系式,求出铱星的效能,从而为星座的设计及优化等问题提供依据.

BDP-ADC model for Iridium constellation effectiveness evaluation

In order to solve the difficulties of traditional models in measuring the constellation effectiveness with continuous time and limited states, a BDP-ADC(birth-death process-availability, dependability, capability) model for evaluating the effectiveness of Iridium is constructed. Firstly, the birth and death process is used to describe the transition process of constellation state, and the limit distribution of the state transition process is obtained, and the availability of Iridium is defined. Then, Kolmogorov forward equation is used to measure the dependability of the constellation in the mission execution process. Then, according to the established Iridium capability evaluation index system, the weight of indexes is obtained by using the entropy weight method, and the constellation capability is calculated with the full probability formula. Finally, the dynamic relationship of Iridium constellation effectiveness is obtained by using the BDP-ADC effectiveness evaluation model, and the Iridium constellation effectiveness is obtained, which provides a basis for constellation design and optimization.