... tầng cố định tầng sơi…Dưới sơđồ cơng nghệ phương pháp Trang 17 ĐAMH CN Q Trình & Thiết Bị GVHD: Lê Xn Hải Hình Sơđồ hấp thụ cồn dạng sử dụng hai tháp Trang 18 ĐAMH CN Q Trình & Thiết Bị GVHD: ... 48 III Tính tốn thiết bị ngưng tụ sản phẩm .64 Kết Luận Tài Liệu tham khảo Trang ĐAMH CN Q Trình & Thiết Bị GVHD: Lê Xn Hải Trang ĐAMH CN Q Trình & Thiết Bị GVHD: Lê Xn Hải ... 33 ĐAMH CN Q Trình & Thiết Bị GVHD: Lê Xn Hải Chương QUY TRÌNH CƠNG NGHỆ I Lựa chọn quy trình cơng nghệ Qua tham khảo tài liệu phân tích thơngsố đầu vào đến chọn cơng nghệ hấp phụ sử dụng chất...
... tử SCADA hệthống PCS7 Siemens (là hệthống điều khiể 20 ĐỒ ÁN ĐIỀU KHIỂN LẬP TRÌNH CHƯƠNG THIẾTKẾHỆTHỐNG 2.1 Sơđồ khối 2.1.1 Xây dựng sơđồ khối hệthống Hình 2.1 Sơđồ khối hệthống • Khối ... Wincc .18 CHƯƠNG THIẾTKẾHỆTHỐNG .20 2.1 Sơđồ khối 20 2.1.1 Xây dựng sơđồ khối hệthống 20 2.2 Chọn thiết bị cho khối .21 ĐỒ ÁN ĐIỀU KHIỂN LẬP TRÌNH ... động hệ thống: Hoạt động hệthống sau: ấn START khởi động hệ thống, đèn báo hệthống RUN sáng, van M mở cho hỗn hợp nhiên liệu vào lò đốt, đèn báo nhiệt độ thấp LA1 sáng nhiệt độ lò lớn 280 ºC Hệ...
... CAPP has focused on process planning for machining New planning domains, on the other hand, arise when new processes are created An example of a new process is layered manufacturing This process ... planning through automation of as many manual tasks as possible CAPP will increase automation and promote integration among the following tasks: Recognition of machining features and the construction ... suit the new part The variant approach has obvious disadvantages The most glaring is the dependence for success on the existence of a family with which a match can be made This means that new parts...
... the network Control networks, or sensor networks, are high-bandwidth networks optimized for sending small, periodic packets of information, as opposed to data networks which send large, asynchronous ... Often, however, many tasks must take place simultaneously The interrelationships and sequential dependencies between these tasks may be specified using a timing bar chart The tasks to be performed ... cycle time, the time dependencies of tasks, and the total cycle time The timing bar chart thus has all the information needed to describe the sequences of tasks that must be performed, and it represents...
... Workpiece uj vibration marks left by tooth (j) Frj Ω kx vj y tooth (j) Ftj tooth (j-1) cx vibration marks left by tooth (j-1) tooth (j-2 ) y cy φj ky x vibration marks left by tooth (j-2) x Dynamic ... machine from an operator panel of the CNC system Readers are referred to machine design handbooks and texts for the basics of designing stationary, linearly moving, and rotating shafts.1 The ... equation The jumping of the tool due to excessive vibrations, and the influence of vibration marks left on the surface during the previous revolutions may further complicate the computation of...
... has motivated integration of multiple measurements through artificial neural networks.24,25 Artificial neural networks have the ability to represent patterns of fault signatures by complex decision ... conditions and material/tool combinations, these networks are not practical A remedy to supervised learning is the application of unsupervised neural networks26 that can form pattern clusters of data without ... data from each category to these networks in order to form the prototype vectors, the demand for training is considerably less Therefore, unsupervised networks have better potential for on-line...
... ASME, New York, 1996, 183 21 Jones, S D., Mori, K., and Ryabov, O., Cutting tool sensor and requirements for reducing process variation, in Japan–USA Symposium on Flexible Automation, ASME, New ... International Mechanical Engineering Congress and Exposition, MED 6-1, ASME, New York, 1997, 97 38 Kannatey-Asibu, E., New concepts on multi-sensor monitoring for reconfigurable machining systems, ... nonadaptive machining operations (From Koren, Y Computer Control of Manufacturing Systems, McGraw Hill, New York, 1983 With permission.) are often monitored as an indirect measurement of other process...
... degrees of freedom In all cases, the properties of control loops: tracking changing inputs (i.e., new part shapes), rejecting disturbances, and decreasing sensitivity to process parameter changes ... how the energy or power variable pairs of each element relate to each other For the machine blocks these properties would typically be the stiffness, mass, and damping of the machine as well as ... control, and they are better used for process diagnosis or some form of statistical process control New optical methods are under development8 that may allow immediate post-process measurement, and...
... W., 1992, Applied Multivariate Statistical Analysis, Prentice Hall, New York Jolly, W D., 1969, Acoustic emission exposes cracks during welding, Welding Journal, 48, 21–27 Jon, M C., 1985, Non-contact ... growth Li et al (1998) used principal component analysis to extract features and then neural networks to classify fault and predict nugget growth 8.2.2 Control Two major difficulties exist with spot-welding ... Examples include Jou et al (1994) and Shriver et al (1998) Because these techniques are relatively new, most of the proposed methods were not implemented as control algorithms They either involve...
... to consider the dynamic buildup of a solidified skin layer as well as the polymer’s complex non-Newtonian (shear dependent) rheological behavior Based on these analyses, sophisticated simulations ... three-dimensional geometries,9,10 such as those presented in Figure 9.2 Continuing research seeks to predict the residual stresses,11-13 fiber orientation,14,15 and other properties of the final ... open-loop, using a fixed time delay specified by the machine operator Thomas et al.40 have developed new sensors that infer the solidification of polymer in the mold, and have devised a closed-loop...
... Wiley, New York, 1994 With permission.) FIGURE 10.14 Fixed and rotating sensitive directions (From Dorf, R and Kusiak, A., Handbook of Design, Manufacturing, and Automation, John Wiley, New York, ... measurement devices such as micrometers, are typically calibrated to gauge blocks that are calibrated against other gauge blocks that eventually can be traced back to a formal calibration at a calibration ... relationships (From Dorf, R and Kusiak, A., Handbook of Design, Manufacturing, and Automation, John Wiley, New York, 1994 With permission.) 10.3.1 Rigid Body Motion and Kinematic Errors There are six degrees...
... military tanks.41 During recent years considerable interest in improving and refining the SA concept has arisen in industry.42,43 Recent advances in smart materials have led to the development of new ... Other Variable Rate Elements Recent advances in smart materials have led to the development of new SA suspensions using indirect influence on the suspension elements A semi-active piezoelectric ... Characteristics It is important to recognize that automobile suspension must perform several tasks in addition to isolating the body from vibration induced by road unevenness.59 The body attitude,...
... the combustion-induced torques acting on the crankshaft in an internal combustion engine is a fixed multiple of the rotational velocity of the crankshaft In order to relax the constraint of a constant ... MDOF primary structure that consists of N lumped disks of inertia moments Ii connected through torsional springs ki and damping members ci The disks are acted on by harmonic disturbance torques Mi ... again for this new pair of (ω1, ω ) and show that there is no root for λ∈[0,1] Therefore, the system still remains stable (operable) The suppression of the oscillation at the new frequencies,...
... networks, Proceedings of ASME IMECE DE75, 187–194 Kahn, S P and Wang, K W., 1995, On the simultaneous design of active-passive hybrid control actions for structures with piezoelectrical networks, ... Linear Optimal Control Systems, John Wiley and Sons, New York Larson, G D., Rogers, P H., and Munk, W., 1998, State switched transducers: A new approach to highpower, low frequency, under water ... piezoelectric networks for structural damping, Journal of Intelligent Material Systems and Structures,11(3), 581–591 Tang, J and Wang, K W., 2001, Active-passive hybrid piezoelectric networks for vibration...
... defined in (16.9) and implemented with three sets of control gains: (i) ks = 2.5, α = 1.1, (ii) ks = 5, α = 0.55, and (iii) ks = 7.5, α = 0.38 is shown in Figure 16.4 It can easily be observed that ... control force is designed as follows: f (t ) = αmuxxxt ( L, t ) − EIuxxx ( L, t ) − ks η(t ) (16.9) where ks is a positive control gain and the auxiliary signal η(t ) is defined as η(t ) = ut ... are more likely to be comprised of long links manufactured from lightweight metals or composites Unfortunately, a major drawback in using lightweight links is the significant presence of deflection...