Design of PLC control system of uniform velocity temperature rise based on idea of devide and conquer
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摘要: 基于实用性、低成本及高精度控制考虑,设计了基于分治思想的恒速升温PLC温控系统。该系统将升温过程分为多个升温子单元,并计算每个升温子单元的升温时间及设定温度,最后依次执行升温子单元。用最小二乘法拟合升温曲线,得到拟合温度曲线升温速率与理论温度曲线升温速率之间的误差为3.62%,表明该系统控制精度较高,升温速率误差较小。Abstract: PLC control system of uniform velocity temperature rise based on idea of devide and conquer was designed based on considerations of practicability, low-cost and high-precision control. The system devided the heating process into multi sub-units, and calculated heating time and set temperature for each sub-unit, and finally execute heating sub-unit successively. Least squares method was used to fit temperature curve, and the error of temperature rise rate between fitting temperature curve and theoretical temperature curve was 3.62%, it indicated that the system has high precision control and small error of temperature rise rate.
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Key words:
- idea of devide and conquer /
- uniform velocity temperature rise /
- PLC /
- curve fitting
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