非线性三维自适应模糊变结构制导规律的研究

Study on Nonlinear Three-Dimensional Adaptive Fuzzy Variable Structure Guidance Law

在三维球坐标系下建立了导弹与目标的相对运动模型,针对大机动目标提出了一种基于零化导弹与目标视线角速度的三维自适应模糊变结构末制导律。所设计的制导律通过模糊系统对非线性模型进行逼近,克服了模型不确定性和外界干扰对制导系统的影响,并把目标加速度视为一类有界干扰,在线对目标加速度的界进行估计。通过计算机数字仿真验证了导弹与目标的相对视线角速度最终趋向于零,验证了制导规律的正确性和有效性。

Three-dimensional relative motion model of missile and target is established in three dimensional spherical coordinates, 3-D adaptive fuzzy variable structure guidance law for homing missile based on zeroing speed of LOS（line-of-sight） angle is presented in intercepting the high maneuverable target. The fuzzy system is used to approximate the nonlinear function so as to overcome the influence of model uncertainty and external disturbance, and the maneuvering acceleration of target is regarded as a disturbance with boundary, which is estimated. Numerical simulation shows that the rates of LOS approach zero. The simulation result verifies the correctness and effectiveness of the presented guidance law.