摘要
反应釜中进行化学反应的反应物由于浓度高、反应剧烈、控制灵敏性及散热问题比较突出,而且反应釜具有非线性、多变量、强耦合、大时滞等特点,控制任务比较复杂,用经典的PID控制很难达到理想的控制效果,本文主要对反应釜的温度控制系统进行了研究,根据反应釜的工作原理,对反应釜的过程特性和动态特性进行了计算分析,建立了反应釜的热量平衡方程,并将其线性化,推导出了冷却剂对反应釜温度的传递函数模型,采用了基于查表的模糊控制和不完全微分PID控制算法相结合的控制方法并进行仿真,结果表明,控制效果明显优于改进前的PID控制效果。
Because of the reactant in tim reaction vessel have a high concentrate and a drastic reaction, the sensitivity of control and the problem of radiating is serious. And the reactive still have the characteristic of nonlinear, muti-variable, strong coupling and big time lag. The control task is complex. And the classical PID control cannot get a good control result.. In this paper, the control system of reactive still is researched. Based on the working principle of reactive still, the numerical analysis of procedure character and dynamic character of reactive still are proceed. The heat balance equation is linearized, and the transfer function between the cooler and the reactive still temperature is deduced. The PID control algorithm is improved. In the control strategy, combination of methods that look-up table-based fuzzy control and incomplete differ- ential PID control algorithm are used, It is described from the simulation result that the control performance is better than the t, nimproved PID controller.
出处
《自动化技术与应用》
2013年第12期29-34,共6页
Techniques of Automation and Applications
关键词
反应釜
温度控制
模糊控制
PID
reactive still
temperature control： fuzzy control： PID
