研究一类具有未知死区的非线性纯反馈系统的自适应控制问题.基于输入状态稳定理论和小增益定理,提出一种自适应动态面控制方案.该方案有效地减少了可调参数的数目,避免了传统后推设计中由于需要对虚拟控制反复求导而导致的计算复杂性.理论分析证明了闭环系统是半全局一致终结有界的. In this paper, an adaptive control problem for a class of nonlinear pure feedback systems with unknown dead zones is studied. An adaptive dynamic face control scheme is proposed based on the input state stability theory and the small gain theorem. This scheme effectively reduces the number of tunable parameters , Which avoids the computational complexity of the traditional pushback design due to the repeated derivation of the virtual control.Theoretical analysis shows that the closed-loop system is semi-globally uniformly terminated and bounded.