针对机动目标, 采用滑模变结构方法, 设计了一种基于零控脱靶量的末制导律。首先, 根据弹目运动方程建立了系统模型; 其次, 选取零控脱靶量作为滑模切换面, 利用指数趋近律和模糊控制法推导了俯仰通道的末制导律; 最后, 对蛇形机动目标进行了弹道仿真, 验证了所设计制导律的可行性和有效性。另外, 仿真结果还表明, 在解决滑模制导律中的颤振问题、缩短剩余飞行时间等方面, 加入模糊控制环节的方法比用饱和函数代替符号函数的方法更加行之有效, 具有更强的鲁棒性。

A terminal guidance law based on zero-effort miss distance was designed with sliding mode approach for attacking a manuvering target.First of all, according to the motion equations of the missile and target, a system model was established.Secondly, the zero-effort miss distance was selected as a switching surface of sliding mode, and the terminal guidance law of the pitch channel was deduced using exponential reaching law and the fuzzy control method.Finally, trajectory simulation was carried out for a snakelike maneuvering target, which verifyed the feasibility and effectiveness of the designed guidance law.In addition, the simulation results also show that in solving such problems as fluttering with sliding mode guidance law, the method with fuzzy control has better robustness and is more effective than the method using saturation function instead of signum function.