fixed target的用法和样例：
例句
- Stability condition of the proportional control algorithm is given for a fixed target.
针对固定目标，文中给出了比例控制算法的稳定性条件。 - In this paper,the method of reentry maneuver guidance applying to attack the ground fixed target is described by using flight dynamics principle and modern control theory.
本文运用飞行力学原理和现代控制理论，对攻击地面固定目标的飞行器的再入机动制导方法进行了研究。
