本文建立塑膠加熱料管中流體溫度分佈的線性離散模式,並依此模式設計狀態迴授控制器,用以控制料管的溫度分佈。推導線性動態方程式後,根據輸出入資料以遞迴最小平方誤差法求算系統方程式的係數。我們也使用內部模式控制驗證所建立的線性模式,以確定模式的正確性。系統的狀態迴授控制器係根據推導的線性動態模式進行設計,最後整合的系統應用於塑膠押出與射出生產程序的加熱料管溫度控制。 In this paper, we derive a linear discrete thermal model for a thermalbarrel in plastic molding processes. A state-feedback controller isdesigned basing on the derived model, and is utilized to control thetemperature distribution in the barrel. The coefficients of the lineardiscrete model are identified by using the Recursive Least-SquareError Method. We utilize an internal model control to verify theconstructed model. The integrated control system is applied to controlthe temperature distribution in a thermal barrel of a plastic moldingmachine.