带落角和导引头视角约束的制导律设计

Guidance Law Design with Impact Angle and View Angle Constraints

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 impactangle constraint is applied to control the terminal angle of the missile. Since it may occur that the targetmoves 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 thepredefined value to maintain the target inside the field of view, and is turned off to apply the originalguidance law if not. The new guidance law can not only retain the high angle characteristics of originalsoptimal guidance law, but also deal with the view angle problem effectively. Simulation results show that itis feasible to achieve navigation with impact angle and view angle constraints by this method.