程序控温算法研究

Research on Program Temperature Control Algorithm

由于程序控温要进行升温-保温-降温曲线控制,因此,程序控温和定值控温的控制算法是不同的。首先,采用PID算法模块和温度曲线设定值发生器程序相结合的方式,对夹套锅炉的温度进行控制;接着,分别使用P、PI、PD、PID等控制规律进行控制,并对监控结果进行对比分析;最后,研究了程序控温过程的P、I、D运算的特点,总结了如何减少温度曲线穿越的控制经验,验证了以PD调节为主、结合微弱的I调节是较为合适的程序控温算法。该算法的实际控温精度小于1 K。

Due to program temperature control is based on heating-holding-cooling control curve; its control algorithm is different from the set- point temperature eontrol. Firstly, by adopting PID algorithm module, and eombining temperature curve set-point generation program, the temperature control for jacketed boiler is conducted. Then, with control rules of P, PI, PD, PID, etc. , the results are compared and analyzed. Finally, the features of P, I, and D operations for program temperature control are researched, and the control experience for reducing cutacross of the temperature curves is summarized. It is verified that PD regulation combining with slight I regulation is the appropriate program temperature control algorithm. The practical temperature control accuracy of this algorithm is less than 1 K.