Wavelet-Based Identification for Control of Watertube Drum Boilers
Wavelet-Based Identification for Control of Watertube Drum Boilers
复制标题
基于小波识别的水管汽包锅炉控制
DOI：
10.1541/ieejias.122.111
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Toru Sanematsu
中科院分区：
文献类型：
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作者：
K. Nakano;T. Tabaru;Seiichi Shin;Y. Toyoda;T. Tsujino;Toru Sanematsu
文摘：作者已经提出了用小波分析辨识具有纯滞后的线性时变系统的方法。本文报道了该辨识方法在某火电厂水管汽包锅炉实际控制系统中的应用。控制系统需要稳定地提供高质量的蒸汽，以防止由于负载的意外变化而产生的扰动。因此，在控制系统设计中，有必要建立一个考虑扰动的精确模型。辨识步骤如下：(1)将单输入/输出系统的辨识方法推广到双输入/输出系统；(2)估计系统被认为处于稳态的时间跨度；(3)估计每个时间跨度内的过程传递函数。与ARX模型相比，根据过程输出(蒸汽压力和水位)的均方误差对所识别的模型进行评估。
Abstract : The procedure for identifying linear time-varying systems with dead times using the wavelet analysis has already been proposed by the authors. This paper reports an application of the identification procedure to actual control systems of watertube drum-boiler in a thermal power plant. The control systems are required to supply steadily high-quality steam subject to disturbances due to unexpected changes in load. Therefore, it is necessary to make a precise model which takes the disturbances into consideration for control system design. The identification procedure is applied by the following steps : (1)extension of the method for single-input/output systems to that for two-input/output systems, (2)estimation of the time span where the system is considered to be in steady states, and (3)estimation of the process transfer functions in each time span. The identified model is evaluated in terms of mean square errors of the process outputs (steam-pressure and water-level) in comparison with an ARX model.