基于ARM的暖房温度控制暨双极性PID控制算法设计

基于ARM控制器,设计双极性PID控制算法,实现对暖房温度的控制. PID输出正极性用电热炉加热,输出负极性用风扇冷却. PID运算采用位置型,并使用梯形积分、积分分离、微分延迟、输出限幅等多种算法,对参与运算的输入输出信号做归一化处理,从而更准确地观察P、I、D运算分量并指导参数整定.测定广义被控对象的数学模型,对象为大惯性、大滞后对象,并且升降温时惯性大小不一样.在实际运行中,当设定值正向阶跃时,超调量较小,稳态误差为±0. 2℃;反向阶跃时,无超调,稳态误差为±0. 1℃.

Design of Temperature Control and Bipolar PID Control Algorithm for Heating Room Based on ARM

Based on ARM controller,this paper designs a bipolar PID control algorithm to control thetemperature of the heating room. PID output positive polarity uses heating furnace,output negative cooling fan. PID operation adopts the position type,and uses various algorithms such as trapezoid integral,integral separation,differential delay,output limit,etc.,to normalize the input and output signals involved in the operation,so as to more accurately observe the operation components of P,I and D,and guide parameter setting. The mathematical model of the generalized controlled object is determined. The object is a large inertia,a large hysteresis object,and the magnitude of inertia is different when rising and cooling. In actual operation,when the set point forward step,smaller overshoot and steady-state error of plus or minus 0. 2 ℃; reverse step,no overshoot,steady-state error of plus or minus 0. 1 ℃.