【摘要】：考慮飛行器模型中的不確定和干擾失配問(wèn)題,針對(duì)再入飛行器提出了一種基于非線性干擾觀測(cè)器的廣義預(yù)測(cè)控制方法。首先,在姿態(tài)子系統(tǒng)中引入虛擬廣義預(yù)測(cè)控制,通過(guò)非線性觀測(cè)器實(shí)現(xiàn)對(duì)控制器中未知干擾的估計(jì);其次,對(duì)姿態(tài)角速度子系統(tǒng)利用廣義預(yù)測(cè)控制方法進(jìn)行實(shí)際控制輸入設(shè)計(jì)時(shí),為簡(jiǎn)化計(jì)算,將虛擬控制的導(dǎo)數(shù)作為不確定項(xiàng)同未知干擾一起利用非線性干擾觀測(cè)器進(jìn)行了估計(jì);最后,基于Lyapunov理論證明了飛行器姿態(tài)收斂到期望姿態(tài)的有界小鄰域內(nèi)。仿真結(jié)果驗(yàn)證了此方法的有效性。
[Abstract]:Considering the uncertainty and disturbance mismatch in aircraft model, a generalized predictive control method based on nonlinear disturbance observer is proposed for reentry aircraft. Firstly, virtual generalized predictive control is introduced into attitude subsystem, and the unknown disturbance in the controller is estimated by nonlinear observer. Secondly, when the attitude angular velocity subsystem is designed by the generalized predictive control method, in order to simplify the calculation, the derivative of the virtual control is estimated by using the nonlinear disturbance observer together with the unknown disturbance. Finally, based on Lyapunov theory, it is proved that the attitude of the aircraft converges to the bounded small neighborhood of the desired attitude. Simulation results show that this method is effective.
【作者單位】： 中國(guó)運(yùn)載火箭技術(shù)研究院研究發(fā)展中心;
【分類號(hào)】：V249.1

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