摘要
通信卫星在轨运行时,行波管放大器发生故障,如何准确快速切换到备份放大器是卫星运营商十分关注的问题。文章提出了一种基于遗传算法的星载功率放大器的备份环开关切换方案,通过编码将开关及其位置信息融入染色体中,根据设计的适应度值计算来判断染色体即开关切换方案的优劣,采用选择-交叉-变异的循环来模拟生物种群的繁殖、竞争、淘汰、平衡的进化过程,仿真结果显示该方法可以快速准确地找到备份环开关切换插入损耗最小的最优方案。
How to accurately and quickly find the best redundancy switching solution of redundancy ring is an important concern for satellite service providers if a travelling wave tube amplifier（TWTA） fails in orbit.However,with the development of telecommunication satellites in the direction of large capacity and long endurance,redundancy ring is bigger and bigger,integrated redundancy rings appear,and redundancy switching solution becomes more and more complex.Traditional enumeration method is inefficient and unreliable for large ring.In this paper,a redundancy switching optimization method based on genetic algorithms is presented.This method integrates the information of switches and their positions into chromosome through coding,determines the order of goodness of chromosome through appropriate fitness calculation and makes use of the cycle of selection,crossover and mutation to simulate the natural evolution process of reproduction,competition,elimination and balance.Simulation results show that the method can accurately and promptly find the optimized solution with minimum insertion loss.
出处
《航天器工程》
2011年第5期93-98,共6页
Spacecraft Engineering
关键词
通信卫星
备份环
备份切换
遗传算法
仿真
communications satellite
redundancy ring
redundancy switching
genetic algorithm
simulation
