【摘要】 针对大机动目标拦截过程中目标加速度未知的问题,提出一种结合有限时间收敛扩张状态观测器与自适应动态面控制的复合三维制导控制一体化设计方法。首先,建立基于弹目视线坐标系下的三维全耦合六自由度侧滑转弯导弹的制导控制一体化模型,减少了假设条件;采用动态面方法,避免传统反步法设计中的"计算膨胀"问题,引入有限时间收敛的扩张状态观测器来在线估计并补偿包括目标加速度在内的不确定性,同时结合自适应鲁棒控制策略,对新型扩张状态观测器的观测误差进行补偿,有效地提高了对大机动目标的拦截精度。基于李雅普诺夫稳定性理论证明了闭环系统的稳定性。导弹六自由度全状态模型的拦截仿真证明了设计方案的有效性。更多还原

【Abstract】 A composite control method combining the finite-time stable nonlinear extended state observer( ESO) and the adaptive dynamic surface control is applied to the integrated guidance and control( IGC) for a skid-to-turn( STT)missile against a highly maneuvering target. Firstly,a new three-dimensional integrated guidance and control design model for a skid-to-turn missile is established with fewer assumptions. Next,a nonlinear ESO with the finite time convergence performance is introduced to estimate the uncertainties including the unknown target accelerations. And then,the adaptive control law is introduced to compensate the error of the extended state observer. Based on the nonlinear ESO,adaptive technique and dynamic surface control( DSC),a composite IGC scheme is proposed. The stability of the system is guaranteed by the Lyapunov stability theory. And the numerical simulations demonstrate the improvements on the hitting performance of the proposed control scheme.更多还原