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为提高空地导弹的制导性能,满足空地导弹对落角约束的要求,获得最佳的打击效果,以经解耦的空地导弹-目标相对运动学模型为基础,应用滑模变结构控制理论推导出了带落角约束的空地导弹滑模末制导律,并用饱和函数取代滑模末制导律中的符号函数,削弱滑模末制导律的抖振。其次,应用模糊控制理论对滑模趋近律系数进行模糊自适应调节,设计出带落角约束的空地导弹模糊滑模末制导律。最后,应用Matlab对该模糊滑模末制导律的制导性能进行数字仿真验证。仿真结果表明,所设计的模糊滑模末制导律能够导引导弹以期望的落角命中目标,具有一定的应用价值。
In order to improve guidance capability of ground-to-air missiles and meet the requirements of ground-to-air missiles for landing angle constraints, the best attacking effect is obtained. Based on the decoupled air-ground missile-target relative kinematics model and sliding mode variable structure control theory, The ground guided missile sliding mode guidance law with the falling angle constraint was used. The saturation function was used to replace the symbol function in the sliding mode guidance law to weaken the chattering of the sliding mode guidance law. Secondly, fuzzy approximation law of the sliding mode is adaptively adjusted by using fuzzy control theory, and the final guidance law of the air-ground missile fuzzy sliding mode with the falling angle constraint is designed. Finally, Matlab is used to verify the guidance performance of this system. The simulation results show that the designed fuzzy sliding mode guidance law can guide the missile to hit the target at the desired angle of arrival, and has certain application value.