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隨負荷變化較大等因
素，提出了一種基于多模型的自適應內模控制策略。通過在不同工況辨識得到其多模型，設計出相應的內模控制器，根據運行工況選擇相應的控制器，從而實現全工況運行的自適應；同時以火電廠過熱汽溫被控對象為參考模型設計自適應控制律，使控制器內部模型的參數逐步逼近被控對象的參數直至相等。仿真結果表明，該控制策略比常規的內模控制具有更好的控制品質。
關鍵詞：自適應；多內模；內模控制；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