中文摘要：

根据牛顿第二定律，建立平流层信息平台-自主飞艇水平位移动力学方程．按等效控制原理设计滑模变结构控制器过程中，提出新的趋近律；将滑模开关面参数从系统允许的最小值逐渐增大到允许最大值，且当该参数达到最大值时，使其随对象参数的变化在指定区间做调整．数值仿真验证了理论分析．

英文摘要：

The dynamic modeling and control problems of horizontal displacement for an unmanned autonomous airship are studied in this paper. Firstly, the dynamic equations are derived by the Newton＇s second law for horizontal displacement of an airship. Then, a sliding mode variable structure control is designed based on the equivalent control principle. A new reaching law is also designed to ensure that the switching hyperplane parameter c rises up from the minimum, and varies adaptively between two specified hyperplanes with object parameters once the parameter c reaches the maximum. Finally, the simulation result validates the theory.