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对具有大滞后时变特性的对象， 提出了一种对史密斯（Ｓｍｉｔｈ） 设计方法的改进方案。调节器按最优控制设计， 引入自适应控制， 使最优调节器以及预估器能不断地跟踪过程特性参数的变化， 确保系统在对象参数变化时仍保持优良的控制性能。
For objects with large time-varying delay characteristics, an improved scheme for Smith’s design method is proposed. The regulator is designed according to the optimal control and adaptive control is introduced so that the optimal regulator and predictor can keep track of the change of the process characteristic parameters to ensure that the system maintains excellent control performance even when the object parameters change.