针对一类具有非匹配不确定性的相似组合系统 ,基于块控原理提出了一种变结构控制设计方法。不确定项存在于各子系统的互联项中 ,可以是非线性的或时变的 ,不满足匹配条件 ,但有界 ;利用反演设计方法来处理系统中的非匹配不确定性 ,再用变结构控制方法来改善系统的性能 ;然后 ,利用Lyapunov稳定性定理证明了闭环系统的信号为最终一致有界且系统的状态收敛于滑模超平面的邻域。最后 ,用一个仿真实例证明了所提出的方法的正确性和有效性。 Aiming at a class of similar combination system with non-matching uncertainty, a variable structure control design method is proposed based on block control principle. Uncertainties exist in the interconnected items in each subsystem, which may be non-linear or time-varying, which does not satisfy the matching condition but bounded. The inversion design method is used to deal with the unmatched uncertainties in the system, Then, the Lyapunov stability theorem is used to prove that the signals of the closed-loop system are ultimately uniformly bounded and the states of the system converge to the neighborhood of the super-plane of the sliding mode. Finally, a simulation example is given to demonstrate the correctness and validity of the proposed method.