针对某些制导**命中目标时的落角指标要求，设计了带落角约束的制导律。基于变结构理论和Lyapunov稳定性理论推导了一种末端带落角约束的滑模变结构制导律，并证明了其稳定性；然后，将该制导律和优化的姿态角约束比例导引律进行了数字仿真比较。结果表明，在攻击地面固定目标时，带落角约束的滑模变结构制导律在保证命中目标的同时满足期望的落角，验证了其制导效果。

Considering that the terminal falling angle of some guidance weapons was required to be controlled,a guidance law with terminal angular constraint was designed.The sliding mode variable structure guidance law with terminal angular constraint was designed based on variable structure theory and Lyapunov stability theory,and its stability was proved.Then the digital simulation result of it was compared with that of the proportional guidance law of terminal angular constraint.It showed that the guidance law proposed here can satisfy the demanded impact angle while hitting a target,and the effect of guidance law was validated.