说明：  无人飞艇在飞行过程中经常受到上升或下降气流的影响，从而使得飞艇的飞行不 稳定，影响任务的执行。本文的主要研究目标为：以ST-3型飞艇为研究对象，针对气 流的影响，设计控制系统。通过控制飞艇发动机推力矢量，即改变飞艇发动机的方向， 向飞艇既提供水平方向的推力，又提供向下或者向上的分力，从而帮助升降舵克服下 降或者上升气流的作用力，使飞艇容易保持预定的高度，提高飞艇的操控性能。具体 工作主要包括以下几个方面：
(During the flight, the unmanned airship often subject to increase or decrease the influence of the air flow, making the airship flight instability, affecting the execution of the task. The main research objectives of this paper are: ST-3 airship for air flow, design of control systems. Through the control of the airship engine thrust vector that change the direction of the airship engine thrust to the airship provides both horizontal direction, but also provide a downward or upward force component helping elevator overcome the decline or updraft force airship easy to maintain a predetermined height to improve handling performance of the airship. Specific work mainly includes the following aspects:)