基于广义预测控制的基准锅炉部分分散控制  

Partially Decentralized Control for a Benchmarck Boiler Based on Generalized Predictive Control

作　　者：傅彩芬[1] 谭文[1] 

机构地区：[1]华北电力大学控制与计算机工程学院,北京102206

出　　处：《控制工程》2015年第6期1087-1092,共6页Control Engineering of China

基　　金：国家自然科学基金(61203107;61174096;61403137);中央高校基本科研业务费专项资金(2014MS20)

摘　　要：针对强耦合多变量锅炉控制系统设计中分散控制不能满足高性能要求,而多变量先进控制算法结构复杂、较难推广的现象,研究基于扩展对象的部分分散控制器设计。设计过程首先通过对已有的分散控制进行分析得出部分分散控制结构,再对其对象进行非方扩展,利用非方广义预测控制方法设计相应的部分分散控制器。该方法能有效克服一般的基于内模控制的部分分散控制设计方法中需要计算非方系统伪逆的缺点。以IFAC大会提出的锅炉系统模型为基础,控制器均采用PID控制形式进行实验研究。仿真结果表明,锅炉系统的部分分散控制与已有的分散控制相比性能更好,且比集中多变量控制结构简单,设计及调试方法更加容易,具有良好的实际应用价值。A decentralized controller may not achieve desired performance for a strongly coupled multivafiable boiler system, while advanced multivariable controllers are usually complex in structure and difficult to spread, so design of partially decentralized controllers based on expansion procedure is studied. Firstly, the structure of partially decentralized control is selected with the analysis of the existing decentralized control, and then an independent design method via the non-square generalized predictive control is applied to design the partially decentralized controllers, which overcomes the drawback of the general IMC method that requires computing the pseudo-inverse of a non-square matrix. The proposed method is applied to the boiler model proposed in an IFAC Conference, and the final controllers are in PID form. Simulation results show that partially decentralized control can achieve better performance than the existing decentralized control, and compared with the multivariable centralized control, it has a simpler structure and is easier to implement and tune, so it is of great practical application potential.

关 键 词：锅炉系统 部分分散控制 广义预测控制 PID控制器 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]