基于改进增量反演法的RLV鲁棒容错控制  

Robust Fault-Tolerant Control of RLVs Based on Improved Incremental Backstepping

作　　者：刘武 都延丽 林海兵 唐明明 LIU Wu;DU Yanli;LIN Haibing;TANG Mingming(College of Astronautics Nanjing University of Aeronautics and Astronautics,Nanjing 211000,China)

机构地区：[1]南京航空航天大学航天学院,南京211000

出　　处：《电光与控制》2021年第6期11-15,共5页Electronics Optics & Control

基　　金：南京航空航天大学研究生创新基地(实验室)开放基金(kfjj 20191504)。

摘　　要：针对可重复使用运载器(RLV)再入过程中存在的未知干扰、不确定性以及舵面部分失效(PELF)等问题,基于增量反演法(IBS)和跟踪微分干扰补偿器(TDDC)设计了鲁棒容错控制律。首先,对姿态角回路和角速率回路分别设计增量控制律,并引入误差积分项增强系统的鲁棒性。其次,对于传统增量反演法直接忽略掉的慢变项和泰勒展开高阶项,基于Sigmoid跟踪微分器设计了适用于IBS控制律的干扰补偿器对其进行估计和补偿。最后,仿真结果表明,相比于传统的增量反演法,所设计的控制律指令跟踪精度更高。In the re-entry phase of Reusable Launch Vehicles(RLVs)there are unknown disturbancesuncertainty and Partial Effectiveness Loss Fault(PELF)of control surfaces.To solve the problemsa robust fault-tolerant control system is designed based on Incremental Backstepping(IBS)and Tracking Differentiator Disturbance Compensator(TDDC).FirstlyIBS control laws are designed for the loops of attitude angles and angular rate respectivelyand an error integral term is introduced to enhance the robustness of the system.Secondlya TDDC based on Sigmoid function applicable to IBS control laws is constructed to estimate and compensate for the slow variable terms and high-order terms after Taylor expansionwhich are omitted by the traditional IBS.Finallythe simulation results show that the control laws presented here have higher command tracking accuracy than the traditional IBS.

关 键 词：改进增量反演法 跟踪微分干扰补偿器 可重复使用运载器 鲁棒容错控制 

分 类 号：V249.1[航空宇航科学与技术—飞行器设计] TP273[自动化与计算机技术—检测技术与自动化装置]