一种采用变采样周期-变结构的炉温控制系统
A Furnace Temperature Control System Using Variable Sampling Period-Variable Structure
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摘要: 本文提出一种采用变采样周期、变结构的电阻炉温度控制系统. 文章从建立纯滞后时间τ的模型出发,在采样过程中使采样周期随纯滞后时间的变化而 变化.而在采样周期缩短到允许的最小值后,模型结构由带纯滞后模型转变为不带纯滞后的 二阶模型. 试验表明该系统的最大超调最小于0.5%.Abstract: In this paper, a temperature control system for electrical heating furnace, using variable sampling period and variable structure is proposed. Based on the model of pure lag time τ, the sampling period T in the sampling process in varied with pure lag time τ. And when the sampling period is shortened to permissible mini- mum, the pure lag time model is changed into the second-order model without pure lag time. Test results indicate that the maximum overshoot in the system is less than 0.5 percent.
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