辊底式连续热处理炉在线控制模型的研究与应用

以辊底式连续热处理炉为研究对象，建立了连续加热和摆动加热过程钢坯二维非稳态传热在线控制数学模型，并与现场实测数据比较分析。表明所建立的数学模型是正确可信的，该模型可以确定在不同的热处理工艺下不同规格和不同钢种的钢坯的最佳运行方式和加热制度，由此开发的辊底式连续热处理炉在线优化控制系统已成功地在某公司应用。     

辊底式快速等温球化连续退火炉及其工艺

辊底式油电复合加热快速等温球化连续退火炉具有快速等温球化退火工艺规程 ,保证金相显微组织级别明显改善 ,有利于切削加工 ,使最终热处理成品质量提高。附图 1幅 ,表 2个。     

辊底式可控气氛连续炉改造综述

介绍可控气氛连续式退火炉电热装置及电控系统的设计改造，对炉体结构、金属加热计算及各温控区功率的合理配置等作了综合描述。     

氮基保护气氛辊底式炉热处理生产线

介绍了氮基保护气氛辊底式炉生产线的组成及技术改进。改进后的辊底式炉热处理生产线使用效果良好，产品质量达到了JB／T1255-2001标准要求。     

连续毡增强热塑性片材辊压机加热辊的设计与计算

加热辊是连续毡增强热塑性片材辊压机的关键部件,其性能直接关系到连续毡增强热塑性片材辊压机的运行速度和产品质量。从加热辊的结构和流道分布入手,在导热油加热的情况下,分析加热辊预热状态与工作状态的热量计算公式,同时通过比较两种状态下导热油的需求量,为加热系统的设计提供参考。     

氮基保护气氛辊底式热处理生产线

介绍辊底式连续热处理生产线的组成装置和技术数据 ,对生产线中主要装置的技术指标和结构特点进行了详细地论述。该生产线运行良好 ,热处理产品质量稳定     

氮基保护气氛辊底式热处理生产线简介

本文概述了我所近十年来开发研制并投产运行的氮基保护气氛辊底式热处理生产线的概况，对该生产线的技术现状改进情况作了进一步的总结，使该生产线日建完善。     

大规格辊底式淬火炉设备在铝合金中厚板生产中的应用

随着中国科技的进步,大飞机计划和强军战略的实施,高性能的铝合金中厚板材越来越多的被应用于航空、航天、舰船等高技术领域,辊底式淬火炉设备在铝合金中厚板生产过程中的重要性也越来越被众多铝加工企业所重视。本文介绍了一台超大规格辊底式淬火炉在铝合金中厚板生产中的应用。     

新型辊底式轴承套圈热处理生产线

针对现有几种套圈热处理设备存在的不足,开发了一种新型辊底式轴承套圈热处理生产线,介绍了其布局、工作过程及结构特点。     

钢厂用炉底辊的结构优化及成本控制

采用有限元分析软件ANSYS对钢厂用炉底辊主要结构(内伸轴直径、内圆板厚度等),在不同温度、载荷下的应力及变形状态进行分析。通过结构优化提高炉底辊的强度和刚度,同时为兼顾产品经济性进行了成本控制设计。     

Experimental and numerical studies on the thermal analysis of the plate in indirectly fired continuous heat treatment furnace

Experimental and numerical studies were performed by considering convective and radiative heat transfer to predict the transient thermal behavior of a plate in an indirectly fired continuous heat treatment furnace. The temperature profiles in the plate were determined by solving the transient one-dimensional heat conduction equation in conjunction with appropriate boundary conditions by using a time marching scheme. The results obtained from the transient analysis were substantiated by comparing with experimental results. Additionally, parametric investigations were performed to examine how the thermal behavior of the plate is affected by plate and refractory emissivities, charging temperature and residence time of the plate, gas temperature of the work and drive sides of the heat treatment furnace, and plate thickness. This paper was recommended for publication in revised form by Associate Editor Ohchae Kwon Young-Deuk Kim is a graduate student at Hanyang University in Seoul, Korea. He earned his B.S. in Mechanical Engineering from Korea Maritime University in 2002 and his M.S. in mechanical engineering from Hanyang university in 2004. His current research areas are modeling of automotive aftertreatment catalysts, optimal design of thermal systems, and phase change modeling with free surface flow. Deok-Hong Kang is a senior researcher at the RIST (Research Institute of Industrial Science and Technology) in Pohang, Korea. He earned his B.S. and M.S. in mechanical engineering from Hanyang University in 1989 and 1993, respectively, and his Ph.D. in mechanical engineering from POSTECH in 2004. His current research areas are mathematical modeling for combustion control, furnace optimization control system, and energy saving engineering in all kinds of furnaces. Woo-Seung Kim is a professor in mechanical engineering at Hanyang University in Ansan, Korea. He earned his B.S. in Mechanical Engineering in 1981 from Hanyang University and his M.S. and Ph.D. in mechanical engineering from North Carolina State University in 1986 and 1989, respectively. His current research areas are modeling of automotive aftertreatment systems, inverse heat transfer problems, optimal design of thermal systems, and phase change heat transfer problems with free surface flow.     

铜扁线连续挤压生产控制系统数学模型的实验测定法

挤压腔体温度的控制作为铜扁线连续挤压生产中的主要控制过程,其受到较多因素的影响,通过解析法建立挤压腔体温度变化的数学模型十分困难,因此本文提出一种通过实验测定的方法建立被控对象数学模型的简易方法,并以此应用于系统控制方面的研究参考。     

基于IPC-PLC的井式渗碳炉计算机监控系统

介绍了基于IPC-PLC结构的多台井式渗碳炉计算机监控系统,详细叙述了该系统的硬件配置(下位机选用SIMATIC S7315-2DP可编程控制器、上位机配用研华工控机)及其功能的软件实现.运行结果表明,该系统保证了工件渗碳过程的工艺质量,降低了能耗,且运行稳定可靠.     

基于PLC的加热炉仪表控制系统优化研究

针对加热炉仪表自动控制系统运行的稳定性和实时监控问题,对加热炉控制系统配置、炉膛温度串级调节系统、炉膛温度压力设定、安全连锁系统等方面进行了研究,对加热炉高压鼓风机入口风门开度减小,空气压力降到极限位而引起的加热炉停炉故障以及因液位检测不可靠而导致加热炉底水位增高并淹没炉底部件的事故进行了分析,对高压鼓风机PI自动调节系统和PLC实时监控技术进行了归纳,提出了改进PI调节器和PLC控制程序以及设备异常状态实时监控的方法。研究结果表明,加热炉两台高压鼓风机入口调节器调节灵活方便,性能稳定,不再出现相互干扰问题;加热炉炉底水位监测准确;优化后的加热炉自动控制系统性能稳定、控制精度高、故障发生率低。     

基于扰动观测器的内模控制在工业过程中的应用研究

介绍了一种工业生产过程中的复合控制方法.该方法结合了内模控制算法和改进的扰动观测器算法,解决了工业生产过程中因扰动导致常规PID控制效果欠佳的问题.理论分析和仿真实验表明,该方法控制效果明显优于常规PID控制,并能有效抑制各种扰动.     

电梯式立体车库能耗最优化控制决策

提出了电梯式立体车库的能耗最优化构想，建立了有关的数学模型，并应用排队论对系统进行仿真，由此给出了车库运行能耗的最优化控制决策，为车库的低能耗运行提供了科学依据。     

分户热计量供热系统中的分户温度模糊控制

房间温度控制是典型的时变迟滞系统,用常规PID控制方式很难实现有效控制,而常规FUZZY控制因其稳态性能不佳,又不能满足某些分户热计量供热系统中的分户智能温控装置对室内热环境实现智能控制的稳态温差不超过±1℃的要求。笔者设计出了一种行为自校正模糊控制器,应用到某分户热计量供热系统中的分户智能温控装置中,通过MATLAB仿真结果表明:该行为自校正模糊控制器的性能优于常规FUZZY控制器和PID控制器。     

Integrated control strategy for CVT powertrains with consideration of vehicle drivability

During shift,power flow is not interrupted in powertrains equipped with continuously variable transmission(CVT).When hard acceleration is commanded,engine speed will flare and corresponding torque will be consumed,which leads to a drop in vehicle drive torque and also the vehicle acceleration.This is the reason why CVT vehicles have poor drivability during hard acceleration maneuver.Conventional method such as torque compensation doesn’t always work due to the limited backup torque of engine.According to this,means to evaluate the drivability of CVT vehicles are studied,affect factors of drivability are analyzed in detail.Hard acceleration process of CVT vehicle is studied by theoretical analysis,based on which engine torque and ratio change rate of CVT are identified as two key control parameters that decide the drivability of CVT vehicles during hard acceleration maneuver.Therefore,a control strategy based on restricting the change rate of CVT ratio together with torque compensation is proposed,and two different algorithms to establish the limitation of ratio change rate are proposed.These two algorithms are simulated and compared with each other,results indicate that drop of vehicle acceleration is eliminated evidently by limit the change rate of CVT ratio,but small ratio change rate also results in a longer time to finish the accelerate process,an algorithm to decide a proper ratio change rate is needed in order to tune these different characteristics.In order to get better control effects,a new fuzzy logic based algorithm is proposed to decide a proper ratio change rate during kick down conditions,simulation and experiment results indicate that,the amount of vehicle acceleration decrease is reduced from about 1 m/s2 to almost 0,in the mean time the accelerate process only delayed for about 0.3 s.The proposed control strategy and algorithm can effectively tune the characteristics of CVT equipped vehicle during kick down conditions.     

基于DMC算法的单晶炉热场温度控制系统

介绍了以AT89C51单片机为核心的单晶炉热场温度控制系统的组成及工作原理.研究了动态矩阵控制(DMC)算法在单晶炉热场温度控制系统中的应用.给出了系统的硬件与软件设计的实现方法.研究表明,与PID控制结果相比较,应用动态矩阵控制算法能使系统具有更好的控制性能.