基于自适应模糊的旋转弹反演滑模控制律设计

针对旋转弹药模型具有非线性、强耦合和参数不确定性等特点,建立了考虑不确定因素的非线性控制模型,提出一种基于自适应反演和滑模控制理论的旋转弹体姿态控制律。基于Lyapunov稳定性理论,利用反演控制和滑模变结构理论取虚拟控制量作为滑动模态,设计了姿态控制器;基于模糊控制方法较强的逼近能力,引入自适应模糊控制实现对不确定参数的估计,同时通过对切换增益的模糊逼近解决了滑模面的抖振问题。仿真结果表明,所设计的控制律具有较好的稳定性和鲁棒性,该控制模型和控制器的设计合理可行。

Backstepping sliding mode control design for spinning ammunition based on adaptive fuzzy method

The spinning ammunition model is highly nonlinear, strong coupling and parameters uncertainty. Considering the uncertain factors of nonlinear control model, an attitude control law is proposed based on backstepping control and sliding mode control theory. The attitude controller is designed based on Lyapunov stability theory, using virtual control volume as the sliding mode. Utilizing the strong approximation capability fuzzy control method, the uncertain parameters are estimated.Simultaneity, the fuzzy approximation of suitching gain is used to solve the chattering problem in sliding surface. The simulation results indicate the proposed control law achieves better stability and robustness, so the design of control model and the controller is rational and feasible.