挠性卫星在控制受限情况下 ,采用简单线性滑动模态设计的变结构控制器不能保证在整条开关线上存在滑动模态 ,因此在大角度机动控制中就不能保证过渡过程品质。本文针对这个问题 ,采用抛物线型滑动模态设计了一种过渡过程性能很好的变结构控制器 ,并且分析了这种非线性滑动模态的稳定性。最后还通过全物理仿真实验验证这种方法对于改善过渡过程的效果 Flexible satellites In the case of limited control, the variable structure controller with simple linear sliding mode design can not guarantee the existence of sliding modes in the entire switch line, so the quality of the transition process can not be guaranteed in the large-angle maneuvering control. In this paper, a parabola-type sliding mode is adopted to design a variable structure controller with good transient performance. The stability of this nonlinear sliding mode is also analyzed. Finally, we also verify the effect of this method on improving the transitional process through full physical simulation