中国科技论文
中國科技論文
중국과기논문
China Sciencepaper
2015年
20期
2452-2456
,共5页
温度控制%大型立式淬火炉%操作模式%灰色评估%温度匹配
溫度控製%大型立式淬火爐%操作模式%灰色評估%溫度匹配
온도공제%대형입식쉬화로%조작모식%회색평고%온도필배
temperature control%large-scale quench furnace%operational pattern%grey evaluation%temperature matching
针对大型立式淬火炉大时滞、非线性、强耦合、温度控制难于满足淬火工艺要求，导致产品质量不稳定的问题，提出了一种基于操作模式的温度优化控制方法来提高铝合金构件的成品率。根据操作模式的基本思想，给出了一种适合大型立式淬火炉生产过程的操作模式描述；采用灰色评估原理和方法，建立了淬火炉生产工况综合评估模型；通过该模型从历史数据库中筛选出优良的、各种批次的淬火温度曲线，结合淬火过程的初始信息和电热元件的通断比，得到相应批次的优化操作模式，组成优化操作模式库。在炉温状态匹配过程中，通过分类搜索的炉温匹配方法进行初始炉温的相似性匹配，快速找到优化操作参数，实现淬火过程温度的优化控制。实际运行结果表明，基于操作模式的温度控制方法能够实现大型立式淬火炉低超调快速升温、精确保温的控制效果。
針對大型立式淬火爐大時滯、非線性、彊耦閤、溫度控製難于滿足淬火工藝要求，導緻產品質量不穩定的問題，提齣瞭一種基于操作模式的溫度優化控製方法來提高鋁閤金構件的成品率。根據操作模式的基本思想，給齣瞭一種適閤大型立式淬火爐生產過程的操作模式描述；採用灰色評估原理和方法，建立瞭淬火爐生產工況綜閤評估模型；通過該模型從歷史數據庫中篩選齣優良的、各種批次的淬火溫度麯線，結閤淬火過程的初始信息和電熱元件的通斷比，得到相應批次的優化操作模式，組成優化操作模式庫。在爐溫狀態匹配過程中，通過分類搜索的爐溫匹配方法進行初始爐溫的相似性匹配，快速找到優化操作參數，實現淬火過程溫度的優化控製。實際運行結果錶明，基于操作模式的溫度控製方法能夠實現大型立式淬火爐低超調快速升溫、精確保溫的控製效果。
침대대형입식쉬화로대시체、비선성、강우합、온도공제난우만족쉬화공예요구，도치산품질량불은정적문제，제출료일충기우조작모식적온도우화공제방법래제고려합금구건적성품솔。근거조작모식적기본사상，급출료일충괄합대형입식쉬화로생산과정적조작모식묘술；채용회색평고원리화방법，건립료쉬화로생산공황종합평고모형；통과해모형종역사수거고중사선출우량적、각충비차적쉬화온도곡선，결합쉬화과정적초시신식화전열원건적통단비，득도상응비차적우화조작모식，조성우화조작모식고。재로온상태필배과정중，통과분류수색적로온필배방법진행초시로온적상사성필배，쾌속조도우화조작삼수，실현쉬화과정온도적우화공제。실제운행결과표명，기우조작모식적온도공제방법능구실현대형입식쉬화로저초조쾌속승온、정학보온적공제효과。
Aiming at issues with inconsistent product quality due to its large time delay,nonlinearity,close coupling and tempera-ture control not meeting quench requirements,a method of temperature optimization control based on the operational pattern is proposed to improve the production yield of aluminum alloy components.According to the basic idea of the operational pattern, an operational-pattern description suited to the production process of large-scale vertical quench furnace is presented.The theory and methodology of grey evaluation are employed to establish a novel evaluation model of furnace production conditions.This model assists the selection of excellent quench temperature curves for each batch from the history database.Thus,the corresponding optimized operational patterns based on the initial information and the on-off ratio of electric heating elements in quench process are obtained to construct the optimized operational-pattern pool.In the procedure of temperature matching,the temperature matching method based on classified search is used for the similarity matching of initial temperature to quickly find the optimized operational parameters and achieve the temperature optimization control of quench process.The actual running re-sults show that the method of temperature control based on the operational pattern can achieve fast heating with low overshoot, high precision in the thermal insulation of large-scale vertical quench furnace.
