说明：  模型参考自适应控制系统由参考模型、受控对象、控制器和自适应律等组成。系统设计的核心是综合和设计控制器和自适应规律，使系统能稳定跟踪参考模型的输出[2]。近年来，对时变系统的自适应控制的研究已取得了较大的进展。在文[3]的基础上，本文针对线性时变系统的一种改进的模型参考自适应控制方案进行仿真研究，仿真结果说明了该控制方案的可行性。
(Model reference adaptive control system consists of a reference model, the controlled object, controller and adaptive laws such as the composition. Is the core of system design and design of integrated controller and adaptive laws, enables the system to stabilize the output of reference model tracking [2]. In recent years, of time-varying systems of adaptive control research has been made greater progress. In the text [3] on the basis of this paper, linear time-varying systems A modified model reference adaptive control program simulation study, simulation results illustrate the feasibility of the control program.)