非线性变结构解耦控制及对再入飞行器的应用

讨论了一类非线性系统的变结构解耦控制在再入飞行器的应用，变结构解耦控制号输入输出线性比相结合得到的控制规律，可对象模型的不确定有鲁棒性，对于再入飞行器再入段存在的多变量非线性和参数不确定，应用了相应的变结构解耦控制的方法，讨论了其滑模面的构造方法和解耦控制条件，在姿态控制中保证了姿态跟踪期望值，在轨迹跟踪中，设计了内外回路在控制律，内回路运用变结构解耦控制保持姿态稳定，外回路通过设计比例微分控制保

Nonlinear Variable Structure Decoupling Control and Application in Reentry Vehicle

The paper investigates the problem of variable structure decoupling control in nonlinear system. The variable structure decoupling combining with input output linearization can be robust to model uncertainties. The construction of slide mode and associated robust analysis are given in the paper.As to the attitude stablization of reentry vehicle with parameter uncertainties,its variable structure decoupling control law is designed and simulation results are given. As to the trajectory tracking of reentry vehicle,we design a two loop control law, while in the inner loop, variable structure decoupling control is used to stabilize the attitude angle,and PD(Proportional Differential) control law in the outer loop can guarantee the required trajectory tracking.