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针对传统飞行控制系统的局限性，提出小型无人机飞行修正变结构控制策略．在纵向轨迹控制系统中引入一饱和型变结构控制器，实现姿态角与高度的自主复合控制，解决了小型无人机超低空飞行触地问题，同时提高了系统的可靠性．
In view of the limitation of the traditional flight control system, the control strategy of small UAV flight modification variable structure is proposed. In the longitudinal trajectory control system, a saturated variable structure controller is introduced to realize the autonomous complex control of attitude angle and altitude, which solves the problem of ultra-low altitude flight contact of small UAVs and improves the reliability of the system.