提出用δ算子设计离散系统模型参考自适应控制的一种新方法 .该方法的特点是在闭环内控制器的设计中利用了离散对象的非主导模型 ,而在现有的方法中 ,非主导模型被当作动态模型干扰来处理 .仿真结果证实该方法对采样速率的要求比现有方法宽松 . A new method to design a discrete system model reference adaptive control using δ operator is proposed. The method is characterized by the use of a non-dominant discrete-object model in the design of a closed-loop controller. In the existing method, The dominant model is treated as a dynamic model disturbance, and the simulation results show that this method requires less sampling rate than the existing methods.