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针对高超声速飞行器无动力再入过程中具有强耦合、气动参数摄动及不确定性的非线性姿态模型,通过构造连续光滑扩张状态观测器及自抗扰串级解耦控制技术,设计了便于工程实际应用的高超声速飞行器自抗扰姿态控制器.通过构造qin函数实现了连续光滑扩展状态观测器的设计,可避免自抗扰控制器应用过程中的高频颤振现象.通过自抗扰串级耦合控制技术,解决了设计飞行器内外环控制器时需忽略内环对外环的耦合影响问题,并解决了难于获取精确的飞行器被控模型及精确的气动参数、摄动界限等问题.仿真结果表明了本方法的有效性.
Aiming at the nonlinear attitude model with strong coupling and aerodynamic parameter perturbation and uncertainty in the process of dynamic reentry of hypersonic vehicle, a continuous smooth expansion state observer and auto-disturbing decoupling decoupling control technology are designed, In order to avoid the high-frequency flutter phenomenon during the application of ADRC, the q-function of continuous hyperstentenance self-disturbance attitude controller Cascade coupling control technology solves the problem that the coupling between the inner ring and the outer ring needs to be neglected when designing the inner and outer ring controllers, and solves the problems that it is difficult to acquire the accurate model of the aircraft and the precise aerodynamic parameters and the perturbation limits. The results show the effectiveness of this method.