基于某装置温控控制器EMC试验的设计改进

为提高航天产品在复杂电磁环境下的适应能力,航天产品对电磁兼容性要求较高,把控非常严格,所有要求测试项目必须通过EMC试验。某装置温控控制器试样件在EMC试验中有3项超标较为严重。通过对温控控制器的电路、结构特点、连接电缆进行分析,主要对抑制干扰源,提高敏感电路的抗干扰能力等进行设计改进,并且用信号发射设备对温控控制器超差项相对应的频段进行了干扰试验,对其试验数据进行对比分析。结果表明,经过EMC设计改进后,温控控制器的电磁兼容性能明显改善,控制器的超标项RS103、CE102、RE102均满足指标要求,通过了国军标GJB151A-97规定的EMC试验所有项目。

基于单片机STC12C5A60S2与无线模块CC1101的电动温控阀控制器设计

基于当前家庭室内供暖、农业温室大棚供暖等方面温控不能实现自我调节的现状,采用单片机STC12C5A60S2与无线模块CC1101设计电动温控阀控制器,控制器包含温度调节控制器、电动驱动控制器,通过对相应的家庭室内供暖、农业温室大棚供暖的温度自动调节测试,整个控制器可有效的实现电动温控阀无线调节。

给PTC暖风机制作温控节能控制器

PTC暖风机(以下简称暖风机)是一种高效、安全的取暖器具，由于它采用了半导体发热元件、大面积散热装置和风扇，将所发热量迅速地向空间扩散和辐射，因此，它有极高的传热效率。同时，由于它发出的暖风较为柔和，没有像电炉丝、红外线灯(管)那样的强烈辐射，因此，即使让其长时间对毛巾、浴巾或衣物等直接烘烤，也不会着火起燃。更因有些暖风机还设有过热保护，

温控单元电气控制系统研究

温控单元是化工系统的重要装置,需要保持一定温度来确保供料系统的安全、稳定、连续运行。文章阐述了温控单元的电气控制原理及故障处理,目的在于提高电气运行人员判断、处理温控单元电气控制系统故障的能力。

安全防护结构在工业电器自动控制温控设备中的作用与效果评估研究

工业电器自动控制温控设备在现代工业生产中扮演着至关重要的角色,其稳定可靠的运行对于生产效率和产品质量具有直接影响。然而,工业生产环境常常存在着恶劣的物理条件和潜在的安全风险,例如高温、湿度、尘埃等,这些因素会对温控设备的正常运行造成影响,甚至带来安全隐患。因此,安全防护结构作为温控设备的重要组成部分,其设计合理与否,对于设备的安全性能和长期稳定运行具有重要意义。

电气安全标准与工业电器自动控制温控设备安全防护结构的关联性分析研究

电气安全标准与工业电器自动控制温控设备安全防护结构的关联性是一个具有重要现实意义和深远影响的课题。通过对这一关联性的研究分析,我们深刻认识到了安全标准对设备安全防护结构的重要指导作用。在工业生产实践中,严格遵守相关的电气安全标准,不断优化安全防护结构,可有效提升工业电器自动控制温控设备的安全性和稳定性水平,为工业生产的安全可靠运行提供了重要保障。

高拱坝温控自动监测和控制技术研究——以锦屏一级水电站为例

为缩短直线工期,加快施工进度,确保混凝土温控质量,项目部经仔细研究和比对,决定采用温控自动监测和控制技术,因此,需要对混凝土双曲拱坝温控自动监测和控制技术进行研究和实施。

安全防护结构对工业电器自动控制温控设备使用者安全意识与行为的影响研究

工业电器自动控制温控设备在工业生产中有非常重要的作用,温控设备关乎到工业生产的顺利进行和产品质量的稳定,突出温控设备在工业生产中的地位和作用。工业生产中安全意识和安全行为对于预防事故、保障生产者人身安全、维护设备安全等方面的重要性,以此引出对安全防护结构对使用者安全意识和行为的研究的合理性和意义。然而,安全防护结构对使用者安全意识和行为影响的研究情况较少。同时,对于提高工业生产安全性、减少事故发生概率、改善生产环境和推动工业发展的重要意义,包括其对生产效率、员工健康、企业声誉等方面的积极影响,以期引起人们对研究问题的关注和认同。基于此,本篇文章对安全防护结构对工业电器自动控制温控设备使用者安全意识与行为的影响进行研究,以供参考。

用于单频Tm∶YAG激光器稳频的精密温控系统

为满足2μm注入锁频激光器对单频种子光激光器中心频率稳定性要求,设计了基于数字PID自适应算法的精密温度控制系统。针对激光器温度变化不确定性的特点,系统采用非线性补偿、数字滤波、硬件隔离和器件选取等方法来提高温控精度。分析讨论了Γ、Kp、Ki、Kd等参数对系统敛散性的影响和调试方法,给出了温度变化时系统控制电压振荡收敛波形。将该系统应用于单频Tm∶YAG激光器中,6 min观察时间内激光器中心频率漂移约为19.776 MHz,频率稳定度约为1.31×10-7,满足2μm注入锁频激光器要求。实验结果证明,该系统工作稳定,抗干扰能力强,在10~35℃范围内温控精度约为±0.01℃。

基于模糊控制算法的热压炉温度控制系统的设计与研究

温度控制系统具有非线性、参数时变、大惯性、迟滞系统等特性。基于模糊控制算法对控制对象具有很好的逼近作用,将模糊控制理论和PID控制两者结合起来,设计出模糊PID控制器。将模糊PID控制器应用到热压炉温控系统中,满足热压炉对温度控制的性能要求。利用Matlab软件对温度控制系统进行建模和仿真,结果表明基于模糊PID控制的温度控制系统具有较好的动态响应和稳定性。

中央空调自调整温度控制系统的设计与实现

针对目前中央空调系统存在的能耗高、调整不便等缺陷,基于单片机,设计了一套中央空调自调整温度控制系统。以STC89C52硬件核心,辅以按键电路、DS18B20温度采集电路、LCD显示电路和加热控制电路进行硬件系统设计。同时提出了系统软件设计与实现方案,使用KEIL 51进行了功能模块设计,采用Matlab实现了系统的阶跃响应仿真,并通过PID控制参数设定完成了对加热功率的控制。最后,对系统功能进行了验证和分析。结果表明:该系统既可提高生活环境舒适度,又能提升能源利用率。

三峡右岸工程厂房坝段IA标夏季砼施工温度控制

夏季混凝土温控工作是一项复杂的系统工程,需严格控制砼生产过程、运输过程及浇筑过程等,夏季砼施工温度控制尤为突出,极其重要。

基于ARM嵌入式的单神经元温度控制系统

论文在Philips公司嵌入式ARM7LPC2210硬件环境下,以ADS1.2软件开发环境,对温控箱采用单神经元PID的控制方法,同时对其进行改进,并与传统的PID和变速PID进行比较。实验结果表明,该控制算法对电加热炉温度具有比传统PID更好的控制效果。

Dynamics and Predictive Control of Gas Phase Propylene Polymerization in Fluidized Bed Reactors

A two-phase dynamic model, describing gas phase propylene polymerization in a fluidized bed reactor, was used to explore the dynamic behavior and process control of the polypropylene production rate and reactor temperature. The open loop analysis revealed the nonlinear behavior of the polypropylene fluidized bed reactor, jus- tifying the use of an advanced control algorithm for efficient control of the process variables. In this case, a central- ized model predictive control （MPC） technique was implemented to control the polypropylene production rate and reactor temperature by manipulating the catalyst feed rate and cooling water flow rate respectively. The corre- sponding MPC controller was able to track changes in the setpoint smoothly for the reactor temperature and pro- duction rate while the setpoint tracking of the conventional proportional-integral （PI） controller was oscillatory with overshoots and obvious interaction between the reactor temperature and production rate loops. The MPC was able to produce controller moves which not only were well within the specified input constraints for both control vari- ables, but also non-aggressive and sufficiently smooth for practical implementations. Furthermore, the closed loop dynamic simulations indicated that the speed of rejecting the process disturbances for the MPC controller were also acceotable for both controlled variables.

Improved Generalized Predictive Control Algorithm with Offline and Online Identification and Its Application to Fixed Bed Reactor

An improved generalized predictive control algorithm is presented in thispaper by incorporating offline identification into online identification. Unlike the existinggeneralized predictive control algorithms, the proposed approach divides parameters of a predictivemodel into the time invariant and time-varying ones, which are treated respectively by offline andonline identification algorithms. Therefore, both the reliability and accuracy of the predictivemodel are improved. Two simulation examples of control of a fixed bed reactor show that this newalgorithm is not only reliable and stable in the case of uncertainties and abnormal disturbances,but also adaptable to slow time varying processes.

Comparison of Two Types of Control Structures for Benzene Chlorine Reactive Distillation Systems

The ＂neat＂ operation of the two-reactant reactive distillation column has Oetter steady-state economics, while It presents a challenge for design, optimization, and control of the process. Based on the optimal economic design, the dual-composition control structure and dual-temperature control structure are designed respectively for the benzene chlorine consecutive reactive distillation process. The effectiveness and robustness are analyzed comparably for the disturbance resistance in terms of changes of production rate and feed composition. Results show that dual-temperature control with propose selection of tray temperatures and the optimal profile of the set point can provide better transient process performance than the composition control structure.

Control structure comparison for three-product Petlyuk column

The focus of this paper is to investigate different control structures(single-loop PI control) for a dividing wall(Petlyuk) column for separating ethanol, n-propanol and n-butanol. Four control structures are studied. All the results are simulations based on Aspen Plus. Control structure 1(CS1) is stabilizing control structure with only temperature controllers. CS2, CS3 and CS4, containing also composition controllers, are introduced to reduce the steady state composition deviations. CS2 adds a distillate composition controller(CCDB) on top of CS1. CS3 is much more complicated with three temperature-composition cascade controllers and in addition a selector to the reboiler duty to control the maximum controller output of light impurity composition control in side stream and bottom impurity control in the prefractionator. CS4 adds another high selector to control the light impurity in the sidestream. Surprisingly, when considering the dynamic and even steady state performance of the proposed control structures, CS1 proves to be the best control structure to handle feed disturbances inserted into the three-product Petlyuk column.

Nonlinear Predictive Control for PEMFC Stack Operation Temperature

Operating temperature of proton exchange membrane fuel cell stack should be controlled within a special range. The input-output data and operating experiences were used to establish a PEMFC stack model and operating temperature control system. A nonlinear predictive control algorithm based on fuzzy model was presented for a family of complex system with severe nonlinearity such as PEMFC. Based on the obtained fuzzy model, a discrete optimization of the control action was carried out according to the principle of Branch and Bound method. The test results demonstrate the effectiveness and advantage of this approach.

基于VC的测井温控仪控制系统设计

该文通过MSComm通信控件编程,实现了测井温控仪与计算机间的数据通信和实时监控,采用临界比例法和实际测试,确定最佳PID参数,实现了最优化控制。这对模拟井下高温环境检测测井仪器性能,提高测井仪器检测和维修的效率,具有重要作用。该程序已成功应用于多种测井仪器的检测和维修中。

Design of Environmental Monitoring and Control System for Large-scale Pig House with Fermentation Bed

The design and assembly of environmental monitoring and control system for large-scale pig house with fermentation bed helped to solve the problem of environmental automatic control in piggery.The sensors would monitor the temperature,humidity,light,wind direction,wind speed,CO2,NH3and other parameters.On-line real-time data collection was achieved.The expert system was constructed to control the temperature in piggery below 30℃,to control the air and mattress humidities higher than 65%.Under the conditions of different season or different wind speed,even in day and night,the control actuators were different.The actuators included fanning wet curtain,lighting,micro spraying,spraying,propeller fan,electric aluminum alloy shutter and spraying systems on the roof.The actuators were integrated,and they control the piggery environment simultaneously.The system also designed the remote video monitor interface,parameter-monitoring curved interface and operation interface,which provided a good man-machine interface.