基于模糊PID控制的压缩机防喘振控制研究

首先闸述了离心式压缩机喘振现象及危害,其次介绍了离心式压缩机防喘振控制机理及控制设计,然后分析了压缩机防喘振的模糊PID控制系统,最后以实例进行了研究,验证了该控制系统的有效性。     

转炉风机防喘振控制系统

根据转炉工作特点和对送风机的需求,分析了防喘振控制系统的任务、功能与控制原理,阐述了控制系统的构成和实现。     

压缩机防喘振保护系统故障浅析

针对压缩机防喘振保护系统，详细介绍机械式触点继电器自身特点造成压缩机喘振、跳车的原因及解决该问题的方法。     

电磁阀在风机防喘振控制系统中的选择与应用

介绍了两通和三通电磁阀以及其供电形式的选择方法,并以电磁阀在风机防喘振控制系统中的应用为例,阐述了电磁阀在防喘振控制系统中发挥的重要性.     

离心式压缩机防喘振控制系统的研究与稳定性分析

防喘振控制系统在保障压缩机安全运行中发挥着重要作用,它一直是压缩机控制系统中研究热点,从压缩机喘振的原因及危害、防喘振曲线性能分析、防喘振控制系统运行稳定性进行研究,提高压缩机防喘振控制系统的安全可靠性。结果表明：熟悉防喘振控制系统的性能曲线特点,从孔板流量变送器、进出口压力变送器和防喘振阀等影响因素进行分析,这对保证防喘振系统的运行稳定性有很好的参考价值。     

基于先进控制技术的轴流风机防喘振优化控制

针对萍钢4#高炉鼓风机存在的问题,阐明了防喘振控制优化的方案,包括工况点沿防喘振线精确控制,进口温度对喉部差压、出口压力的补偿,提出了控制优化的具体实施方法,优化达到了预期目标.     

AV50—11轴流压缩机的防喘振控制

结合工厂应用实例,介绍轴流压缩机喘振产生的机理。详细阐明AV50-11轴流压缩机的防喘振控制系统实施原理和实施方法。     

射流风机防喘振装置及其流动的数值模拟

针对隧道活塞风引起的射流风机喘振问题,介绍了一种简易的射流风机防喘振装置.运用Fluent软件对改进前后的射流风机流场进行了数值模拟并进行了对比,结果表明这种防喘振装置能有效的改善风机内部流场,是有效的防喘振措施.     

浅谈增压透平膨胀机防喘振控制设计与应用分析

增压透平膨胀机在运行中,会产生喘振问题,如果不进行技术处理,设备运行的稳定性和安全性将会受到很大影响.本文对增压透平膨胀机喘振问题出现的原因进行了分析,并就其防喘振设计与应用进行了讨论,希望能够防止增压透平膨胀机进入喘振区域,确保设备的正常运行.     

离心空压机喘振与控制

由于离心式空压机结构简单,排气量大,效率高,目前广泛应用于冶金、化工以及空分等行业。但离心式空压机在运行过程中,对气体的压力、流量以及温度变化较为敏感,容易发生"喘振"现象。离心空压机喘振具有较大的危害性,是造成空压机损坏的主要原因之一。因此,研究和预防喘振的发生,弄清和掌握喘振的机理,采取有效控制措施避免喘振的发生是离心空压机控制中的重要任务。     

离心式压缩机的喘振分析与控制

利用离心式压缩机性能曲线及管路特性曲线的特点，结合加氢装置解析气压缩机实际情况，对离心式压缩机的喘振现象进行分析，并提出了防喘振措施。     

离心压缩机的喘振分析与控制

对离心压缩机输气系统工程中喘振产生的机理进行了系统的分析，在此基础上给出了喘振发生的条件与判断方法，并提出了采用人工智能控制算法对喘振进行控制的解决方案。     

离心压缩机喘振特性及喷射扩稳研究

以某单级离心压缩机为研究对象,搭建工况动态特性实时监测系统,通过控制排气调节阀的开度展开喘振实验研究,在此基础上,设计和实现离心压缩机的主动控制喷射扩稳,通过小孔喷射高速气流实现喘振裕度的提升.研究表明:出口压力脉动幅度大大高于进口压力脉动,进气管道流动进入深度喘振的起始时刻要落后于排气管道进入深度喘振的起始时刻;机匣...     

大型空分等温离心压缩机组控制系统设计应用

以大型空分等温离心压缩机组控制系统设计应用为出发点,阐述了该类型机组的控制系统选型设计原则以及核心控制对象的控制实现方法.结合国内某化工厂大型空分等温离心压缩机组的应用实例,对该类型机组的控制系统选型、控制对象的控制思路和实现方法做了功能性介绍.     

Experiment and surge analysis of centrifugal two-stage turbocharging system

To study a centrifugal two-stage turbocharging system’s surge and influencing factors, a special test bench was set up and the system surge test was performed. The test results indicate that the measured parameters such as air mass flow and rotation speed of a high pressure (HP) stage compressor can be converted into corrected parameters under a standard condition according to the Mach number similarity criterion, because the air flow in a HP stage compressor has entered the Reynolds number (Re) auto-modeling range. Accordingly, the reasons leading to a two-stage turbocharging system’s surge can be analyzed according to the corrected mass flow characteristic maps and actual operating conditions of HP and low pressure (LP) stage compressors.     

基于LabVIEW的离心压缩机动态压力测试系统研究

从分析表征离心压缩机喘振发生时的动态压力特性入手,揭示离心压缩机的出、入口及叶轮处的动态压力信号对研究压缩机喘振主动控制的重要意义。随后在800 k W离心压缩机系统上设计了动态压力测量的NI测试系统,并用Lab VIEW进行软件开发和实现。为致力于研究离心压缩机系统特性、喘振机理及主动控制方法的工程技术人员提供了搭建测试系统的设计原则和实现方法,具有重要的参考价值。     

乙烯压缩机防喘振控制

介绍了离心式压缩机工作过程中喘振产生的机理,喘振的危害。分析了造成喘振的主要因素,并对常用的防喘振控制方法进行了比较和分析。详细介绍了某装置压缩机防喘振控制的具体实现。     

A pressure output feedback control of turbo compressor surge with a thrust magnetic bearing actuator

This paper presents a pressure output feedback control of turbo compressor surge using tip clearance actuation with a thrust magnetic bearing actuator. First, static and dynamic compressor models were obtained for a commercial turbocharger, and the surge point was found through local stability analysis. Then, the effect of tip clearance on the compressor pressure rise was derived, and Lyapunov analysis was used to establish a limit of stability with tip clearance modulation. After that, a linear quadratic (LQ) state feedback control was designed considering the limit established by the Lyapunov analysis. In addition, an extended Kalman filter (EKF) was designed to estimate the mass flow rate from the measured compressor pressure. Finally, the pressure output feedback controller was built by combining the LQ state feedback control and EKF. Control simulation proved the effectiveness of the output feedback controller. This paper was recommended for publication in revised form by Associate Editor Dong Hwan Kim Dr. Ahn earned Ph.D. from Seoul National University in 2001. He was a research associate of University of Virginia. He is currently an assistant professor of department of mechanical engineering at Soongsil University and serving as an editor of international journal of rotating machinery. His research interests are rotordynamics, control and mechatronics. Mr. Park is a junior research engineer in Doosan infracore. He received his master from Seoul National University. His research area is on dynamics and control of rotating machinery. Dr. Sanadgol is an assistant Professor of Physics and Engineering at Sweet Briar College. She earned her PhD in Mechanical and Aerospace Engineering with a focus in controls from the University of Virginia in 2006. Her research interests are in controlling flow instabilities in compressors and application of nonlinear control theories to mechatronics systems. Dr. Park received his PhD degree from the Seoul National University, Korea in 2007. He is currently director of research institute at KMB&SENSOR company. His research interests include the precision machine design, rotor dynamics, and magnetic actuators. Dr. Han received the Dipl.-Ing. and Dr.-Ing. in mechanical engineering from University of Karsruhe, Germany in 1975 and 1979, respectively. In 1982, he joined the school of mechanical and aerospace engineering, Seoul National University as an assistant professor. He is currently an honorary professor of mechanical engineering. His research interests are in machine element design, magnetic bearing, lubrication engineering and Bio-MEMS devices. Dr. Maslen is a Professor of Mechanical and Aerospace Engineering at the University of Virginia. He earned his Bachelor of Science in 1980 from Cornell University and his doctorate from the University of Virginia in 1991. His research focuses on application of automatic controls to electromechanical systems with a concentration in magnetic bearings.     

基于PLC的温度控制系统的设计

阐述了基于S7-200的温度控制系统的软、硬件设计。系统调试表明,整个控制系统结构简单,运行稳定,便于维护,实现了温度的闭环控制。