面向结构动静态变形控制的作动器综合优化配置研究  

Research on Integrated Optimal Configuration of Actuators for Structural Dynamic and Static Deformation Control

作　　者：王祥[1] 王晓宇[1] 柴洪友[1] WANG Xiang;WANG Xiaoyu;CHAI Hongyou(Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)

机构地区：[1]北京空间飞行器总体设计部,北京100094

出　　处：《航天器工程》2022年第1期64-72,共9页Spacecraft Engineering

基　　金：国家重点研发计划项目(2020YFA0711700)。

摘　　要：针对航天器柔性结构动态和静态变形控制的作动器布局关键问题,提出了一种综合优化配置方法。首先,基于有限元分析方法建立结构和压电作动器的模型。然后,基于可控Gramian矩阵提出了一种新的动态变形控制准则,并以形面均方根误差(RMSE)作为静态变形控制的优化准则。改进NSGA-II遗传算法的交叉和变异算子,以动/静态变形控制准则为目标,获得作动器综合优化配置Pareto最优解集。最后,提出归一化加权方法进行最优解集的综合筛选。最后,文章以一大型抛物柱面天线的支撑桁架为例,通过仿真验证了综合优化配置方法的优越性,其优化配置结果兼顾了动态变形控制和静态变形控制的性能。To deal with the key issue of actuators placement for dynamic and static deformation control of space flexible structure,an integrated optimal configuration method is proposed.Firstly,the models of structure and piezoelectric actuator are established based on finite element analysis method.Then,a new criterion for dynamic deformation control is proposed based on the controllable Gramian matrix,and the root mean square error(RMSE)of surface is used as the optimal criterion for static deformation control.By improving the crossover and mutation operators of NSGA-II genetic algorithm,the Pareto optimal solution set of actuator position is obtained with the aim of dynamic/static deformation control.Finally,an integrated selection is obtained by normalized weight method.A support truss of large parabolic cylindrical antenna is chosen as an example.The superiority of integrated optimal configuration of actuators is verified by the simulation,which takes into account the performance of dynamic and static deformation control.

关 键 词：支撑桁架 综合优化配置 动态变形控制 静态变形控制 改进NSGA-II算法 

分 类 号：V414[航空宇航科学与技术—航空宇航推进理论与工程]