The process of analyzing “ step algorithm ” gives us food for thought . that is , whether equal increase or decrease in the bandwidth of two virtual paths will result in rearrangement of the sequence of cbps of these two 在对步进式算法的分析过程中,引出了这样一个问题:对两条虚路径增减相同的带宽,会不会改变它们呼叫损失率的大小关系。
The structure of the valve is superior to the conventional valve and the continuously tracing method solves the problem that arises as a result of the constradiction between the stepping error and response speed of the digital valve 该阀的结构较传统的阀更加简单、可靠，且采用连续跟踪控制方法消除了传统的步进式数字阀所固有的量化误差与响应速度之间的矛盾。
Based on it , a new - style step - type electric - hydraulic servo is developed which simplifies the structure and improves the reliability of the governor , and the mathematical model and its stability control equation are obtained 在此基础上，提出一种全新的步进式电液随动系统，使调速器整机简单可靠；同时在建立该随动系统数学模型的基础上，得出了其稳定性控制方程。
A pcc based stepping motor driven dual control governor for kaplan turbine is presented in this paper . the governor adds the function of adaptive control of blades and radius basis function cam network based on the current pcc based stepping motor driven single control governor 该调速器在当前pcc步进式水轮机单调整调速器的基础上引入了桨叶自适应控制和基于rbf网络的协联装置，可定期对转桨式水轮机协联关系进行自校正，保证水轮机始终运行在较高效率区。
According to the present problems and developing tendency of hydraulic turbine governor , four main issues of this field are studied in this paper . the content include hydraulic control system , frequency measurement unit , stability of the discrete control system , optimization of control parameters and self - adjusting pid control strategy based on fuzzy logic . several main achievement and results are obtained and shown as follows : the electric - hydraulic pilot valve driven by step - motor is firstly proposed , which solves the problem that the electric - hydraulic converter of hydraulic turbine governor hydraulic servo is prone to be stuck and blocked and improves the systemic stability greatly 本文根据水轮机调节领域存在的问题和发展趋势，对水轮机调速器的液压控制系统、频率测量环节、离散调节系统稳定性与调节参数最优整定以及适应式参数自调整pid控制策略进行了研究，得到以下主要成果和结论：首次提出了采用步进电机驱动的步进式电液引导阀，从根本上解决了水轮机调速器电液随动系统中存在的电液转换元件发卡、堵塞问题，使电液随动系统的可靠性大大提高。
The thesis emphasis the way and arithmetic of the key equipment of walking reheating furnace : loader machine , unloader machine , walking system , series transfer roll , control system of burning and tracking of steel billet , . make use of the system , we can carry out the function of transferring measuring and weighting , detecting , loading and unloading tracking the steel billet , we can control process of burning and exchange data each other to track the steel billet and manage the process over all of product line . goals of reheating furnace ' s producing process such as high yield , low consuming and pollution , automatic operating mode are achieved 本文着重研究了步进式加热炉关键设备如：装钢机、出钢机、步进梁、炉前炉后辊道、燃烧控制、板坯物流跟踪等控制对象的具体控制软件流程、速度控制曲线、行程计算等具体控制策略和算法，完成了攀钢1450热轧加热炉基础自动化系统（ l1 ）和热工仪表的一级控制，实现板坯输送、测量、装出料、物流跟踪、加热炉燃烧控制以及板坯库的数据信息交换,通过plc和二级计算机系统进行顺序、定时、联锁与逻辑控制，实现了操作自动化与物料系统的全线跟踪管理。
This article put forward the useful and easily - realizable and reliable control arithmetic and the way to realize the basic automatic control system of walking reheating furnace , on the basis of including the theory of process control , technology of dcs and plc , communication , fieldbus , and in term of the characteristic of the walking reheating furnace , also by using the electrical and instrument control equipment with the practical and reliable technology and advanced quota 本文在总结过程控制理论、 dcs和plc技术、网络通信技术、现场总线的基础上，采用技术实用、可靠、指标先进的电控仪控的装备水平，结合步进式加热炉运行的特点，设计了不同形式的既简单又实用的控制结构和算法，实现步进式加热炉的基础自动化控制。
We can realize the instrument control system and electric control system by using dcs and plc . the control system of reheating furnace is devided torol furnace area plc control system , roll plc control system and reheating furnace dcs control system . the controller of instrument and electric connect to the server of the operater station by the controlnet , by using dcs and plc , the technology of network and fieldbus technology to combine the process control system and process computer , intelligent instruments , drive system to realize the instrument and electric controll in one system 采用dcs系统plc实现仪控和电控系统，把步进式加热炉控制系统分为加热炉炉区plc控制系统、加热炉前后辊道plc控制系统、加热炉dcs控制系统等三个子系统，仪表、电气传动用的控制器通过同一controlnet控制网与操作站的服务器连接,通过采用网络技术和现场总线技术，将控制系统与过程机、现场智能仪表和传动设备连成一个整体，从而构成仪电一体控制系统。
Through the analysis of heat - transfer process of the slab in reheating furnace , the numerical simulation of the temperature within the slab was carried out with the finite difference method , and an optimized mathematical model for heating - up process curve in a reheating furnace was given by using the flexible tolerance optimization method 摘要通过对钢坯在步进式炉内传热过程的分析，采用有限差分方法对钢坯内温度进行数值模拟，用可变容差优化方法建立了钢坯最优加热数学模型。
According to the relation between searching step and adjusting step , step - advance following can be divided into four kinds : memory - extemum tracking , same - step - advance tracking , both - direction - search - equal - adjustment step tracking , both - direction - search - changeable - adjustment step tracking . in this system , by analyzing and comparing , we select the mode of both - direction - search - equal - adjustment step tracking 根据搜索步和调整步之间的关系，可把步进跟踪分为四种：记忆极值式跟踪、同一步步进式跟踪、双向搜索等调整步式步进跟踪和双向搜索变调整步式步进跟踪。
