在分析离散滞后变结构控制系统中抖振产生的原因基础上，提出了三种改进的方案，即边界层衰减法，切换函数衰减法以及智能控制法。
After analyzing the causes of chattering, three improved strategies are developed, they are boundary layer decay strategy, switching function reduction strategy and intelligent control strategy.
针对一类无法用控制手段抑制超调的纯滞后系统的特点，设计了一种变结构模糊控制器，通过在实验室中电阻炉上的应用，证明了此控制器的有效性。
The paper aims at a class of time delay system to design a variable structure fuzzy control. Its application to the heater in laboratory proves its effectivity.
仿真表明该方法设计的具有控制滞后的变结构系统避免了控制量延迟对系统动静态的不利影响，控制效果良好。
Simulations show that the above solution avoids adverse influences for control-delay on the performance of variable structure control systems with control-delay, and control effect is fine.
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