Aiming at the controlling to production of beer with usual equipment in many beer factories of our country , there ' re many disadvantages in such production process the data of product ca n ' t be protected and analyses , controlling accuracy and mobility ca n ' t satisfy and easily produce the problem of the qualityc it adopts ipc - plc distributed control system , the function of the system is very higl reliability and practically techniques advancement completely meets the demand of modern production , furthermore , improves the demand of development the thesis mainly improves bp neural networks fuzzy controlling self - adaptive controlling arithmetic , according to characteristics of inertia and time lag in beer ' s fermentation process . 本文针对我国大部分啤酒生产工艺虽然开始启用一些控制设备,但多数存在控制过程简单,可视性差,生产过程数据不能进行有效地保存和分析,控制精度和灵活性也欠佳,很容易出现质量的问题。为此我们采用了工业控制计算机与可编程序控制器组成分布式计算机控制系统( ipc ? plcdcs ) 。该系统性能/价格比高、可靠实用、技术先进,完全满足啤酒生产发酵工艺的技术要求,并兼顾了发展的需求。
It now possesses of not only some production equipment advanced in the national level , such as automatic hydraulic pressure spring eye machines , automatic control quenching furnaces and automatic control tempering furnaces the control accuracy attains 5 and shot blasting machines of landscape and vertical orientation , but also some sophisticated quality detection equipment , such as durometers , metallographic microscopes , stiffness and endurance test machines , etc . besides the hardware equipment , the company has a group of senior specialized technical personnel in the field of the design of the leaf spring processing , the leaf heat treatment as well as the tqc total quality control 拥有自动液压卷耳机自动控温的淬火炉和回火炉炉温控制精度达到5横向和纵向喷丸机等国内先进的生产设备。同时还有为保证质量购置的硬度计金相显微镜刚度检测及疲劳试验机等先进的质量检验设备。从产品生产开始的每一个环节进行全方位的质量控制。
These are communication between distance sensors and plc , the realization of pid control in plc and the data - input of bcd dial plate . applying the plc in the spotting hydraulic presses , which enhances the reliability and anti - interference greatly , buildups the position control accuracy , promotes the spotting quality , realizes the combination of machine , hydraulic and electronics 将plc应用于研配液压机系统的控制,极大的提高了系统的可靠性和抗干扰能力,同时也增强了位控精度,很好的提升了研配质量,实现了机电液的有机结合。
After researched fuzzy self - tuning pid parameters controller , a simulation experiment is shown in this paper , which demonstrated this controller is feasible . at last , a practical experiment is made with the efpt process - control equipment , the result of the experiment manifests : fuzzy self - tuning pid parameters controller integrate the advantage of pid controller and the fuzzy controller , it has the following character : small overshoot ; short transient time ; excellent control accuracy and no stabilizing error 本文在设计的pid参数模糊自整定控制器的基础上进行了仿真实验,论证了这种控制器的可行性,最后在efpt过程实验装置上进行了模拟实验,实验结果表明pid参数模糊自整定控制器集合了pid控制器和智能权模糊控制器所具有的优点,能很好地控制锅炉液位的稳定,具有超调量小,过渡时间短,控制精度高,无稳态偏差的特点。
As the percentage of flexible space structures and the requirement for control accuracy continuousely increase , the control of flexible space structures is increasingly important . focusing on the problem of vibration control of clamped beam , the thesis studied the application of wave absorbing theory to the vibration control 随着空间结构中的挠性结构的比重的不断增加和轨道、姿态控制精度要求的不断提高,使挠性结构振动控制日益重要,本文针对悬臂梁的弯曲振动控制问题,研究了波吸收器在振动控制中的应用。
According to magnetic medium following the theories , such as ferromagnetics , electromagnetic field , electrodynamics and so on , and linking the characteristics of driving of giant magnetostrictive materials , a control model and driving approach , which one to one correspondence with magnetostriction , are founded . the theory analysis and experimental study demonstrate that the control accuracy of giant magnetostrictive materials can be effectively improved , if using this control model and control approach of giant magnetostriction materials on account of flux density 通过理论分析和实验研究表明:这种基于磁感应强度的超磁致伸缩材料的控制模型和控制方法,可有效地提高超磁致伸缩材料的控制精度;研制了具有驱动磁场和微位移感知功能的磁场与位移感知型超磁致伸微位移执行器,并提出了适用于此种执行器的设计理论和方法。
Finally , on the basis of the simplified model , the control accuracy and the angles that can be achieved by the bionic actuating device is analysed through three changes of the air pressure , and the three changes are simulated by the matlab . the simulated results are analysed and the different accuracy range is achieved . the simulation results can be applied by the future work 最后根据简化模型,分析了气动人工肌肉在三种不同气压变化幅度下,整个驱动装置的控制精度和可以实现的角度,并使用matlab对这三种情况分别仿真,对仿真结果进行分析,得到驱动装置运动的不同精度范围,为以后实际控制驱动装置的动作提供了依据。
Abstract : the digital pid control equation in microcomputer - based control systems is introduced . the effects of the technologies of digital smooth filtering , first order recurrence filtering and dynamic compensation for improving the control features and enhancing the control accuracy are emphasized . the results of simulation test are illustrated 文摘:介绍了微机控制系统中的数字pid控制算式,重点分析了数字平滑滤波、一阶递推滤波和动态补偿技术在改善控制性能、提高控制精度中的作用,给出了仿真实验的结果图。
They indicate that the controller can reduce large overshoot , increase control accuracy and make system effective in robustness to model uncertainties , meanwhile prove the superiority of this intelligent tuning method of pid controller over the classic one in the application of a kind of process plant 实际运行结果表明此方法具有良好的控制效果,它能够降低被控量超调、提高控制精度并且增强系统的鲁棒性。可证明在这类对象的应用中,该方法优于传统的pid控制方法。
The temperature - control accuracy of gas chromatograph , mode of entry of liquor samples from vaporizing chamber after vaporization to chromatographic column , dnp chromatographic column efficiency , and liquor analysis time length etc . are the factors influencing the accuracy of the data in the analysis of liquor microconstituents by gas chromatograph 气相色谱仪器的控温精度、酒样进入汽化室汽化后进入色谱柱的方式、 dnp色谱柱效、酒样分析时间的长短等都是影响气相色谱仪分析白酒中微量成分数据准确性的重要因素。