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反应釜>>行业动态
国内外的反应釜发展现状趋势
发布者:admin  日期:2016-04-29  点击:2889

国外如日本、美国等都生产出了一批商品化的、性能优异的温度控制器及仪器仪表,且适用于大惯性、大滞后等复杂温度控制系统,而国内与之有较大的差距,这使得反应釜温度控制器的研制在技术和市场上都将有较大的突破空间。  在催化剂的生产过程中,对反应釜的加热温度控制直接影响其生产过程的精度,最终影响产品的好坏。而反应釜www.gfanyingfu.com的温度控制是工业控制中典型的迟滞、时变与非线性的不确定性系统。

 

Foreign such as Japan and the United States were also produced abatch of goods, the excellent performance of temperature controller andinstrumentation, and applicable to large inertia and lag in the complextemperature control system, and domestic and have large gap, which makesdevelopment of reactor temperature controller in the technology and the marketwill have a greater breakthrough in space. In the production process of thecatalyst, the heating temperature control of the reactor directly affects theaccuracy of the production process, and ultimately affects the quality of theproduct. The temperature control of the reaction vessel is a typical delay,time varying and nonlinear uncertainty system in industrial control.

 

目前,位于化工自动化最底层的控制器仍然是以PID为主流。PID方法是一种基于过程参数的控制阀,其控制原理简单、实现方便,但在控制对象非线性时变、给定突变、大时滞系统等情况下,过程模型难以确定,参数调整往往比较困难,即使可行也因调整时间过长、超调量过大,使控制效果不佳,因此,使用先进的控制理论来弥补PID控制方法的不足,成为目前国内外自动控制方面的一个主要课题。

 

At present, located in the bottom of the chemical automationcontroller is still to PID as the mainstream. PID is a control valve based onprocess parameters, the control principle is simple, easy to implement, butchanges in the nonlinear control object, given mutation, large time delaysystem, process it is difficult to determine the model, parameter adjustment isoften more difficult, even if feasible for adjustment for a long time,overshoot is too large, makes control effect is poor. Therefore, using advancedcontrol theory to make up for the inadequacy of the PID control method become amajor topic at home and abroad in the aspect of automatic control.

 

常规的PID 控制方法控制简单、容易实现且稳态性较好,但难以适应控制系统的控制参数和工作条件的变化,温度始终有较大波动,得不到理想的结果。模糊控制的最大特征是它能够将操作者或领域专家的控制经验和知识表示成语言变量描述的控制规则,然后用这些规则去控制系统。它具有高度的仿人智能特性、不依赖精确数学模型的特点,是解决间歇聚合反应过程控制问题的一种有效方法。虽说模糊控制的动态性较好,但由于控制器的输入端被控量的偏差和偏差变化率,相对于PID控制,其稳态性较差。对于温度控制需要高动态性和稳态性的情况下,采用模糊控制和PID控制的两者的结合,可以扬长避短,分别满足控制系

 

The conventional PID control method is simple, easy to implement andhas good steady-state performance, but it is difficult to adapt to the controlparameters of the control system and the change of working conditions. Thebiggest characteristic of fuzzy control is that it can express the controlexperience and knowledge of the operator or domain expert into the control ruleof language variable description, and then use these rules to control thesystem. It has a high degree of human simulated intelligent characteristics,does not depend on the characteristics of the precise mathematical model, is aneffective way to solve the control problem of batch polymerization process.Fuzzy control has better dynamic performance, but because the controller'sinput end is controlled by the amount of deviation and deviation change rate,relative to the PID control, its stability is poor. For the temperature controlunder the condition of high dynamic and steady state, the combination of fuzzycontrol and PID control of both, can foster strengths and circumventweaknesses, respectively, to meet the control system

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