2 edition of Cross-directional estimation and control of web forming processes found in the catalog.
Cross-directional estimation and control of web forming processes
K. W. Corscadden
|Statement||K. W. Corscadden ; supervised by S. R. Duncan.|
|Contributions||Duncan, S. R., Electrical Engineering and Electronics.|
Weblio 辞書 > 英和辞典・和英辞典 > 時間計算 60進法の意味・解説 > 時間計算 60進法に関連した英語例文. %% This BibTeX bibliography file was created using BibDesk. %% %% Created for Alexa Hornby at %% Saved with. In web addition of filler, a ground calcium carbonate dispersion (denoted as GCC spray in Fig. 4) was sprayed onto both sides of a wet web at 20% web consistency, after forming. The wet web sheets were pressed with an MTS sheet press to a solids content of approximately 40%. Then, the sheets were sprayed with cationic PAM (CPAM), and dried in a.
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A basis function approach , which had been applied successfully to the cross-directional control of other web forming processes [5, 6], was applied to the analysis and design of flatness.
Cross-directional control systems have been installed on a wide range of web processes, and many of these systems use an array of actuators to control cross-directional variations. The process control problem for sheet and film processes is typically separated into two main control objectives.
One is the maintenance of uniform thickness along the length of the sheet or film (see Fig. 1), which is referred to as the machine-direction (MD) control problem (Smook, ), since the sheet or film travels through the machine in this by: This paper presents the closed-loop performance analysis of a cross-direction (CD) control system and explores the tuning criterion for CD control app Cited by: 1.
Abstract. Sheet- and film-forming processes are used to make a variety of polymer and paper products. Uniform properties, such as thickness of the film or paper, are desired in both the cross direction and machine by: 3. The aim of this work is to improve the identification of cross-directional (CD) models as well as to simplify the robust control design problem.
Providing computationally efficient techniques for identification and robust control will facilitate the implementation of an autonomous CD control system.
These are challenging problems as CD processes are large scale distributed parameter systems Cited by: 3. A key issue in paper-machine Cross-Directional (CD) Control is alignment. Typically, this mapping problem is a non-linear and slowly time-varying phenomenon for individual machines.
The first part of this thesis specifically focuses on different causes of the misalignment and reviews recent developments in CD mapping. It summarizes the results of a comprehensive survey of different alignment Author: Fazel Farahmand. estimation and control of cross directional pro]~crtie\.
lye will show that this decision depends on parameters which affect tlle estirnatioil problem. sucl~ as the system climension, the dominant time constant, the sampling rate, the ratio of process noise to illeasureinent noise, and correlation be.
Application of basis functions to the cross-directional control of web processes. S.R. Duncan, W.P. Heath, A. Halouskova and M. Karny. I.E.E. International Conference on Control, Exeter UK, Two-dimensional methods for machine direction and cross-direction estimation and control.
Summary. Two dimensional (2D) system and signal process ideas are used as a paradigm for the analysis of industrial web processes. This applications driven approach to 2D systems gives a special perspective which directs the development of corresponding 2D identification and control : P.
Wellstead, M. Zarrop, S. Duncan. The cross-directional control of web forming processes. Ph.D. thesis, University of London, London, UK. Duncan, S. (a). The design of robust cross directional control systems for paper making.
Control Systems Centre ReportUMIST, Manchester, UK. Duncan, S. (b). Observers and controllers for cross directional control of web. Papermaking is a large-scale two-dimensional process.
It has to be monitored and controlled continuously in order to ensure that the qualities of paper products stay within their specifications.
There are two types of control problems involved in papermaking processes: machine directional (MD) control and cross directional (CD) by: Orthogonal functions for cross-directional control of web forming processes Heath, W. P., FebIn: Automatica. 32, 2, p. 15 p. Research output: Contribution to journal › Article.
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data networks and web-based processes made it practical, (blocking of cross-directional payments due to lack of liquidity in gross payment systems) Journal of financial transformation. Synthesis and the tools to control performance, that is, macromerization, radiation-induced and chemical curing, and tackification, are also described.
Water- and solvent-based adhesives are examined in comparison. Chapter 6 of this book is focused on silicone pressure-sensitive adhesives. The objective function can have diﬀerent forms in process control, shape optimization, inverse modeling/parameter estimation or optimum experimental design.
Usually, there arise additional constraints for the state and control functions in terms of inequalities r(y(t), u(t), p, t) ≥ 0. Figure 2. (a–c) Color plots of differential conductance (G = dI/dV bias) as a function of V gate and magnetic field B at V bias = 0 mV for different contact pair combinations: (a) A–B, (b) A–D, (c) A– bottom panels in a–c show I–V traces indicating line cuts of a–c at different B values 0 T (green), 5 T (red), and 8 T (black) with a horizontal offset between the individual Cited by: Search the history of over billion web pages on the Internet.
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The ﬁnal chapter (Chapter 10) focuses on web and sheet forming processes. It demonstrates how the statistical techniques can be applied to evaluate process and control performance for quality assurance and to acquire fundamental insight towards the operation of such processes.
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The prerequisite is a basic course in hydraulics. Cross-directional interlocking of rolls in an air press of a papermaking machine.
DOEpatents. Beck, David A.; Gorshe, Thomas. An air press for pressing a paper web is composed of a plurality of rolls including at least a first roll and a second roll.
The first roll and the second roll are positioned adjacent one another and form a. Control of web internal stresses Fibers and the layers of fibers are bonded to each other by fiber bonds, which transmit shear forces and other loads to the network.
A single fiber bond is dependent on the fibrillation of the fiber surface and on the degree of polymerization (DP) of the fiber wall cellulose.Categories. Baby & children Computers & electronics Entertainment & hobby.ROAD MAP The first half of this book introduces the concepts and tools used to control industrial processes through process imaging, and the second half presents several applications of the technology in various industries.