基于模糊滑模的可重复使用飞行器再入控制研究  

Reusable Launch Vehicle Re-entry Control Research Based on Fuzzy Sliding Mode Control

作　　者：宋勋[1] 宋健爽[1] 任章[1] 

机构地区：[1]北京航空航天大学自动化科学与电气工程学院,北京100191

出　　处：《系统仿真学报》2008年第S2期404-407,共4页Journal of System Simulation

摘　　要：针对可重复使用飞行器再入过程所跨空域广、气动参数变化范围大、外界干扰严重、对象不确定性强等特点,提出了一种模糊滑模姿态控制系统。将滑模控制和模糊控制结合起来,提出一种模糊滑模面设计方法,即保留了滑模控制的快速性和鲁棒性,又很好地抑制了抖振。内环控制中用滑模观测器来估计外部干扰和不确定性,增强控制器的鲁棒性。最后,六自由度非线性仿真验证了所设计控制系统的性能。A fuzzy sliding mode attitude control system is presented for reusable launch vehicle(RLV) in re-entry flight phases,which has large flight airspace,aerodynamic parameter varying widely,serious external disturbances and worse model uncertainty.A fuzzy sliding mode surface design method is introduced.This method combines sliding mode control with fuzzy control,which holds the celerity and robustness of SMC and also weakens the buffeting very well.The sliding mode disturbances observer(SMOD),which estimates external disturbances and model uncertainties,is used in the inner loop improving robustness of the fuzzy SMC.Full 6-DOF nonlinear simulation shows effectiveness of the designed attitude control system.

关 键 词：可重复使用飞行器 模糊滑模控制 滑模观测器 

分 类 号：V249.1[航空宇航科学与技术—飞行器设计]