针对导弹实现终端大落角对目标进行攻顶的需求，通过带落角约束的最优制导律来控制终端落角，此过程中可能会出现目标超出导引头视场的现象，所以设计了一种带修正项的制导律。该方法是在最优制导律的基础上引入一个修正项，当导引头视角超出设定阈值时开启修正项，使目标始终处于视场之内；当视角小于阈值时关闭修正项以发挥原制导律的优势。该制导律既保留了原来最优制导律的高落角特性，又有效地处理了导引头视角的问题。仿真结果表明：通过该方法实现带落角和导引头约束的导引是可行的。

In order to attack the top of a target at large terminal anglethe optimal guidance law with impact angle constraint is applied to control the terminal angle of the missile. Since it may occur that the target moves beyond the seekers field of viewa guidance law with an amendment part is designedi.e.introducing a part based on the optimal guidance law. The part works if the view angle exceeds the predefined value to maintain the target inside the field of viewand is turned off to apply the original guidance law if not. The new guidance law can not only retain the high angle characteristics of original soptimal guidance lawbut also deal with the view angle problem effectively. Simulation results show that it is feasible to achieve navigation with impact angle and view angle constraints by this method.