窦立谦, 毛奇, 苏沛华
AuthorsHTML:窦立谦, 毛奇, 苏沛华
AuthorsListE:Dou Liqian, Mao Qi, Su Peihua
AuthorsHTMLE:Dou Liqian, Mao Qi, Su Peihua
Unit:天津大学电气自动化与信息工程学院，天津 300072
Unit_EngLish:School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
Abstract_Chinese:针对可重复使用运载器再入段参数不确定性和外界干扰问题, 提出一种基于补偿控制器的自适应模糊姿态控制策略. 首先, 建立飞行器六自由度动态模型, 并将模型转化为严反馈形式姿态控制系统．其次, 将外界干扰与参数不确定性共记为系统不确定性项, 并设计模糊控制器进行在线自适应逼近. 为消除模糊建模误差对系统控制性能与稳定性的不利影响, 引入补偿控制器以改善飞行器姿态角跟踪性能．再次, 基于Lyapunov理论证明了系统的稳定性且姿态跟踪误差收敛于小邻域中．最后, 基于类X-37B六自由度模型仿真验证了所提出控制策略的有效性．
Abstract_English:To attenuate the adverse effects of parameter uncertainties and external disturbances for reusable launch vehicles(RLVs)during reentry phase，an adaptive fuzzy attitude control strategy based on compensation controller is proposed. Firstly，the six-degree-of-freedom(6-DOF)dynamic model of RLV is established，which is transformed into a strict feedback form attitude control system. Secondly，the external disturbances and parameter uncertainties are regarded as a system uncertainty term，and the fuzzy controller is designed to approximate adaptively the uncertainty term online. Furthermore，to eliminate the effect of fuzzy modeling error on system control performance and stability，a compensation controller is employed to improve the attitude tracking performance of RLV. In addition，the system stability is proved based on Lyapunov theory and the attitude tracking error converges to a small neighborhood. Finally，the effectiveness of the proposed control strategy is verified by simulation analysis based on a similar model of X-37B aircraft.
Keyword_Chinese:可重复使用运载器; 姿态控制; 模糊控制; 补偿控制器
Keywords_English:reusable launch vehicle(RLV); attitude control; fuzzy control; compensation controller

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