【摘要】 针对近空间飞行器从近空间空域返回地面再入大气层的飞行过程中其姿态控制系统发生传感器故障的情况,研究了基于广义扩张系统方法的传感器故障调节问题。首先,将再入飞行阶段的近空间飞行器非线性姿控系统用一组T-S模糊模型来表示,并基于此模糊模型引入传感器故障模型。然后,将含有传感器故障的T-S模糊模型利用广义扩张系统方法将其转化为T-S模糊奇异系统,进而设计一个全维状态观测器来得到被控系统的状态向量和传感器故障信号的估计值,并在此基础上提出了一个利用传感器故障补偿技术的反馈控制策略,使得闭环控制系统能够渐近调节传感器故障的影响。最后,通过数值仿真验证了所提方案的有效性。更多还原

【Abstract】 In this paper,the sensor fault accommodation problem for the attitude control system of near space vehicle in reentry flight phase is investigated by using the generalized augmented system method.Firstly,the T-S fuzzy model is represented by the nonlinear attitude control system of near space vehicle in reentry phase.Meanwhile,the sensor fault model is introduced. Secondly,the T-S fuzzy model with sensor fault for near space vehicle is transformed into a T-S fuzzy singular system by using the generalized augmented system.A full-dimension state observer which is used to estimate the state vectors and the sensor fault vectors of the attitude control system is designed.Based on the estimated fault,the feedback control scheme is given by utilizing sensor fault compensation technique,such that the closed-loop control system can asymptotic accommodate the effect of sensor fault.Finally,simulation results are given to demonstrate the effectiveness of the proposed approach.更多还原