電阻爐溫度控制系統(tǒng)設(shè)計與實現(xiàn)畢業(yè)論文-全文預(yù)覽
【正文】 行校正。這時，總的熱電動勢就變成工作溫度t1的單值函數(shù)，可記為Et1。 實際使用時，測量場所與測量儀表往往相距很遠，又因為組成熱電偶的材料比較貴重，所以常加導(dǎo)線來連接。對于已選定材料的熱電偶，當其自由端溫度恒定時， 為常數(shù)，這樣回路總的熱電動勢僅為工作溫度t1的單值函數(shù)。接點1在測量時被置于測場所，故稱為測量端或工作端。（2）電阻爐溫度控制系統(tǒng)是負反饋控制系統(tǒng)，即反饋信號與給定信號相減以獲得偏差信號。對象特性曲線對應(yīng)的傳遞函數(shù)為： ()這種近似方法擬合精度較差但方法簡單，但方法簡便，而且實踐表明它可以成功地應(yīng)用于PID調(diào)節(jié)器的參數(shù)整定。關(guān)鍵詞：電阻爐；PID；單回路控制系統(tǒng) Design and Realize Temperature Control System of Resistance FurnaceAbstractTemperature is one of mon and the most basic parameters in the industrial production. General physical and chemical changes have a close relationship with temperature, as a result, generally speaking, it is necessary to detect and monitor temperature during production.Type resistance furnace of laboratory is such a temperature object that has a bigger pure lagging and a temperature constant, the design chooses a PID adjustment principle. According to the control precise of design requirements, the design chooses a single circuit controlling system. The design chooses two design plans: of which the first one is a DDZIII instrumentbased control system, in which an open loop system is made up of to survey the features of the temperature object, with which calculate the control parameters of the PID controller, and after a close loop control system is made pletely, it is necessary to adjust the parameters of the PID controller manually to get the best parameters for PID。在做成閉環(huán)控制系統(tǒng)之后，還需要手動調(diào)節(jié)PID參數(shù)，使PID參數(shù)達到最優(yōu)。 電阻爐溫度控制系統(tǒng)設(shè)計與實現(xiàn)摘 要溫度是工業(yè)生產(chǎn)中常見的和最基本的參數(shù)之一，一般物理變化和化學(xué)變化的過程都與溫度密切相關(guān)，因此生產(chǎn)過程中常需對溫度進行檢測和監(jiān)控。本設(shè)計選用了兩套設(shè)計方案，第一套方案是基于DDZ—Ⅲ型儀表設(shè)計的控制系統(tǒng)，在第一套方案中先組成開環(huán)系統(tǒng)測量溫度對象特性，并根據(jù)對象特性計算出PID控制器的控制參數(shù)。由于
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