基于前向补偿的再入飞行器制导控制一体化设计

An Integrated Guidance and Control Method with Forward Compensation for Reentry Vehicle

针对再入飞行器的制导控制问题,提出了一种基于前向补偿的滑模制导控制一体化设计方法。首先,建立了面向控制的再入飞行器制导控制一体化控制模型。其次,设计了非线性干扰观测器对未知干扰进行实时观测,基于反演法和滑模控制方法设计了传统的一体化控制律。在此基础上,改进了滑动模态设计消除系统间的耦合,设计了具有前向补偿的再入飞行器制导控制一体化控制系统,使得整个制导系统是有限时间稳定的。最后,非线性六自由度数字仿真结果表明,相对于传统一体化设计方法和分离设计方法,该方法具有更好的制导性能和鲁棒性。

An integrated guidance and control method with forward compensation is proposed according to the guidance and attitude control system of reentry vehicle.Firstly,an oriented-control integrated guidance and control model is built for reentry vehicle to intercepting maneuvering target.Secondly,a nonlinear disturbance observer is design to estimate the known disturbance,a traditional integrated guidance and control law is designed based on backstepping and sliding mode control method.An integrated guidance and control law with forward compensation is presented by the improving sliding mode to eliminate the coupling of control system,and the finite time convergence of guidance and control system is obtained.Finally,the simulation results of the six degree-of-freedom dynamic model show that the proposed method works with better guidance performance and robustness than the traditional integrated guidance and control method and separated guidance and control method.