針對電廠過熱汽溫被控對象具有大慣性、大滯后特性且對象參數(shù)隨負荷變化較大等因
素，提出了一種基于多模型的自適應(yīng)內(nèi)模控制策略。通過在不同工況辨識得到其多模型，設(shè)計出相應(yīng)的內(nèi)模控制器，根據(jù)運行工況選擇相應(yīng)的控制器，從而實現(xiàn)全工況運行的自適應(yīng)；同時以火電廠過熱汽溫被控對象為參考模型設(shè)計自適應(yīng)控制律，使控制器內(nèi)部模型的參數(shù)逐步逼近被控對象的參數(shù)直至相等。仿真結(jié)果表明，該控制策略比常規(guī)的內(nèi)模控制具有更好的控制品質(zhì)。
關(guān)鍵詞：自適應(yīng)；多內(nèi)模；內(nèi)模控制；過熱汽溫
abstract: According to the performance of superheated steam temperature, the adaptive internal model control (IMC) method based on multiple models is suggested. The multiple models are obtained by the weighted-sum. Their corresponding internal controllers are designed. By choosing an appropriate controller according to the operating conditions, the self- adaptive control of the total operating conditions is realized.And this paper takes the main steam temperature controlled process as the reference model to get the rule of adaptive control in order to make the parameters of nominal model approach the parameters of the controlled object and gradually equal it.. The simulation results show that the method is effective.
Key words: Adaptive；Multiple Models; Internal Model Control; Superheated Steam Temperature