【作者】 齐维贵； 朱学莉； 丁宝； 吕丽；

【Author】 Qi Weigui Zhu Xueli Ding Bao Lu Li(Harbin Institute of Technology,Harbin 150006 (Architecture Technology Institute of China,Beijing 100044)

【机构】 哈尔滨工业大学； 中国建筑技术研究院；

【摘要】 本文首先阐述了图示法的原理,图示法是把设计系统的指标、对象、控制三个要素用特征方程统一起来,通过几何映射,得出控制器的算法;然后分析了单回路PID整定,整定中指标用期望极点表示,对象用有理分式模型表示,同时给出了PID整定的图示算法;在单回路整定的基础上,文中介绍了热工过程控制常用的串级系统主副调节器的整定,当主副回路时间常数相差较大时,可采用先整定副回路,再整定主回路的方法,而当主副回路时间常数相差不大时,采用补偿整定法;最后列举了热工对象实例及工程应用来说明本文提出整定法的可行性。更多还原

【Abstract】 This article sets forth the principle scheme of graphic method first. The graphic method seeks unity of three key elements ,index,objective and control of the designed system by eigen equation,and gets the algorithm of the controller by geometrical mapping. Then,it introduces tuning method of single loop PID control. The indexes are shown by expected poles,and the objective is indicated by the rational fraction model in the tuning process, respectively. Meanwhile,the graphic algorithm of PID tuning is given. It presents tuning method about main and auxiliary regulators of serial control system of heat engineering process on the basic of single loop tuning method. When there is a big difference between time constant of main loop and that of auxiliary loop, it is used that the auxiliary loop is tuned first,then main second. When the time constants between the main loop and auxiliary loop are close to,compensated tuning method is used. Finally,some examples and applications in engineering are used to explain the feasibility of the tuning method.更多还原