IMC系统的优化滤波器研究

• 作 者: 王晓霞 王启志 王永初
• 机 构: 华侨大学!福建泉州,362011,华侨大学!福建泉州,362011,华侨大学!福建泉州,362011
• 出 处: 自动化与仪器仪表
• 发表日期: 2000年05期
• 关键词: 滤波器 IMC Butterworth IMC系统 最优滤波器 最优原理 模型失配 ITAE滤波器 低通滤波器 复平面

推荐两种滤波器作为IMC系统的滤波器。一种是ITAE滤波器 ,它符合时间乘绝对误差积分值最小的优化原则 ,即J =∫ |e|tdt→min ;另一种是Butterworth滤波器 ,它具有很好的理想低通滤波器特性。由于这两种滤波器的全部结构极点均处于S复平面的高稳定性区域 ,又是按最优原理确定其参数 ,因此 ,采用这两种滤波器可以抑制模型失配导致的不良影响 ,使得IMC系统的鲁棒性更加有保证。本文列举一个工业过程控制例子说明IMC系统结构的最优滤波器的设计过程。

Two types of filters are recommended as IMC system filters. One is the ITAE filter, which complies with the principle of minimizing the time integral of absolute error, J = ∫ | e | tdt → min; the other is the Butterworth filter, which has good ideal low-pass filter characteristics . Since all the poles of these two filters are in the high stability region of S complex plane and their parameters are determined according to the optimal principle, the use of these two filters can suppress the adverse effects caused by the model mismatch, The robustness of the IMC system is even more assured. This article presents an example of an industrial process control IMC system architecture design of the optimal filter design process.