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针对姿控式直接力/气动力复合控制拦截弹,提出一种基于干扰补偿和动态面方法的制导控制一体化(IGC)算法.首先设计一种适用于未知上界干扰的变增益扩张状态观测器(TVGESO),在有效保证估计精度的同时,能够减弱初始尖峰现象;然后考虑目标机动以及喷流扰动等模型不确定性,应用TVGESO在线干扰逼近补偿,基于积分滑模动态面方法设计了IGC算法;最后基于Lyapunov理论对闭环系统稳定性进行证明.数值仿真结果表明了所提出设计方案的有效性.
In order to control the interception of the direct force / aerodynamic hybrid control interceptor, an integrated guidance control (IGC) algorithm based on disturbance compensation and dynamic surface method is proposed. First, a variable gain expansion state observer (TVGESO) can effectively reduce the initial spikes while ensuring the accuracy of the estimation. Then, considering the model uncertainties such as the target maneuver and the jet perturbation, TVGESO is used to compensate the on-line interference and the integral sliding mode dynamic surface method is used to design the IGC Finally, based on Lyapunov theory, the stability of the closed-loop system is proved. The numerical simulation results show the effectiveness of the proposed design.