Decoupling control system for a chemical cascade process, characterized by a given value response controller C, disturbance observer F, intermediate process identification model of P: 1m, the final process identification model of P: 2M and four signal mixer, wherein the first signal mixer set value input in response to the C controller in a given, it has a positive input end and a negative input end of the road, the output end is connected with the input end of a given value response of the C controller; the second signal mixer is arranged at the input end at the middle level of P down 1, it has a positive input way at the end of a road and the negative input end of the output end connected with the input end of the actual process of intermediate level P: 1; third signal mixer set in the actual output intermediate process of P down 1 end And it has a way of positive input and a negative input end and the output end is connected with the input end of the disturbance observer F; fourth signal mixer is arranged in the actual final P down 2 at the output, it has a positive input end and a negative input end of the road. The output end is connected to the first signal mixer negative input terminal; the external setpoint input r connects to the first signal mixer, the output setpoint response controller C is connected with the input terminal of the first signal mixer, the output response of C controller divided the given value, the positive input end of a road connecting the second a signal input end of the mixer, a road connecting the middle level identification model of P down 1m; disturbance observer F input output is connected with the third signal end of the mixer, disturbance The dynamic observer F is connected to the output end of the second signal mixer negative input; output intermediate process identification model of P: 1m is connected with the third signal mixer negative input terminal, final process identification model of P: 2m input output signal connected to intermediate level P: 1 the final output, process identification model of P: 2m is connected with the fourth signal mixer negative input terminal.
【技术实现步骤摘要】
本专利技术涉及一种化工串级生产过程的解耦控制系统,是针对化工串级生产过程,以最优控制理论和鲁棒控制理论为基础,提出的一种新颖的两自由度解耦控制系统,属于工业过程控制
技术介绍
许多化工生产过程采用串级控制系统来抑制负载干扰信号。通常一个串级控制系统包括两个反馈控制闭环,即用一个反馈控制外环嵌套一个控制内环。该控制内环中的对象是中间级可测量输出的过程。当有负载干扰信号混入该中间级过程时,控制内环能尽快调节中间级过程输入能量以减小和抑制负载干扰信号的影响,使得中间级过程输出平稳,从而避免或减小负载干扰信号渗透和扩展到末级主输出过程,保证主要过程输出的稳定性。因而在实际可能的情况下,使用串级控制方式能达到比经典的单回路控制系统更好的负载干扰抑制能力。然而常规串级控制系统的缺点也是很明显的如控制内环和控制外环之间具有耦合作用,使得调节和整定控制系统比较麻烦。即首先要整定内环控制器且将外环控制器置为手动状态,当整定内环控制器达到满意的内环控制性能后再整定外环控制器直至达到满意的外环控制性能。一旦最终得到的整个控制系统性能指标不能达到指定的要求,或者由于在系统运行中发生过程参数摄动而导致控制系统性能指标下降,则必须按照上述整定步骤重新调节内环和外环控制器,所以无论是预先整定常规串级控制系统还是在线调节常规串级控制系统都是比较繁琐的,而且不进行仔细整定所得到的控制系统性能不见得比经典的单回路控制结构更好。此外,控制内环的负载干扰响应会引起末级主要过程输出正负两个方向的振荡,这在多数情况下是很有害的甚至是不允许的。因此在目前一些工业实际应用中,工程师和实际用户 ...
【技术保护点】
【技术特征摘要】
【专利技术属性】
技术研发人员:刘涛,顾诞英,张卫东,蔡云泽,何星,
申请(专利权)人:上海交通大学,
类型:发明
国别省市:
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