本恒溫控制系統(tǒng)精度要求高，且由半導(dǎo)體制冷器件構(gòu)成的溫控系統(tǒng)具有非線性、大慣
性及數(shù)學(xué)模型難建立等特性，這使得常規(guī)PID 控制器無法很好地滿足系統(tǒng)要求，因此本文設(shè)計了一種新型模糊PID 參數(shù)自整定控制器，該控制器能夠發(fā)揮模糊控制魯棒性強(qiáng)、動態(tài)響應(yīng)好、上升時間快、超調(diào)小的特點，又具有PID 控制器的動態(tài)跟蹤品質(zhì)和穩(wěn)態(tài)精度，具有很好的實時性，并在實際使用中取得良好的控制效果。
關(guān)鍵詞：恒溫控制系統(tǒng)；模糊PID 算法；半導(dǎo)體制冷

Abstract: The system accuracy of the constant temperature control has high request, and temperature control system constituted of semiconductor refrigeration has nonlinear, big delay and difficult establishment characteristic of mathematics model, etc. Normal PID controller cannot satisfy system require perfectly, so a new self-adaptive fuzzy PID controller is introduced in this paper. This method can exert fuzzy control characteristics such as high robustness, good dynamic response, short rising time, small surplus, it possesses the dynamic track quality and steady precision of PID controller and good real-time processing. This controller is taken into implication in practice and gets preferable control effect.
Key Words: constant temperature system, fuzzy PID, semiconductor refrigeration