摘要
针对高超声速飞行器再入过程中飞行包线大,参数不确定性强等特点,设计一种利用不确定系统建模和μ综合控制的鲁棒姿态控制器。首先,考虑飞行器的参数不确定性,建立系统线性分式变换(LFT)模型。随后,考虑建模结构不确定性及测量噪声等的影响,建立用于μ综合控制的互联结构。最后,分别设计H∞控制器和μ综合控制器,结合频域μ分析方法对系统鲁棒性和动态性能作了对比分析,结果表明该方法可以很好地跟踪指令,具有较强的鲁棒稳定性。
Aiming at the large flight envelope and strong uncertainties of aerodynamic parameters and atmospheric environment during the hypersonic flight vehicle reentry process, a robust controller which combines linear fractional transformation （LFT） with It synthesis is intorduced. Firstly, parameter uncertainties of the flight vehicle are considered to form a LFT model. Then, by taking structure uncertainties and sensor noise into account, the control block diagram forit synthesis control is formed. Finally, H∞ controller and it synthesis controller are designed separately to be compared and analyzed by the robust performance and dynamic capability of the closedloop system using it analysis methods. The simulation results show that this control system instructions can be tracked well and this method has strong robustness.
出处
《航天控制》
CSCD
北大核心
2017年第1期20-24,共5页
Aerospace Control
关键词
高超声速飞行器
Μ综合控制
结构不确定性
线性分式变换
Hypersonic vehicle
μ synthesis control
Structure uncertainties
Linear fractional transformation
