为了较好地控制平流层飞艇的姿态，将滑模变结构控制方法和PID控制方法应用于平流层飞艇的姿态控制设计中，该飞艇模型具有参数静不稳定性。首先，以平流层飞艇平台为研究对象，建立了飞艇的六自由度线性动力学方程。然后，结合滑模变结构控制律和经典控制方法，设计了飞艇姿态控制的滑模控制器和PID控制器。最后，通过数据仿真，得出了较好的姿态控制效果，并对两种控制方法进行了对比分析。仿真结果表明，滑模变结构控制可以作为平流层飞艇平台姿态控制的研究方法，能够较好地控制飞艇的姿态。

In order to control the attitude of stratospheric airship，the Sliding Mode Control (SMC) and PID control are applied in the attitude control design for the airship with unstable parameters. The stratospheric airship platforms are studied at first and a six-DOF linear dynamic equation is built up for the airship. Then the SMC controller and PID controller are designed for attitude control of the airship. Digital simulations were carried out， which showed that the good effect for attitude control. The two control methods are compared with each other. Simulation results showed that the SMC can control the attitude of stratospheric airship finely.