principles of computer graphics

... of computer integrated manufacturing Thus the implementation of CIM required the development of whole lot of computer technologies related to hardware and software 1.4 CIM HARDWARE AND CIM SOFTWARE ... SUBSYSTEMS OF FMS 19.3 SCOPE OF FMS 19.4 FMS COMPARED TO OTHER TYPES OF MANUFACTURING APPROACHES 19.5 TYPES OF FMS 19.6 BENEFITS OF FMS 19.7 MAJOR ELEMENTS OF FMS 19.8 OPTIMISATION OF FMS 19.9 ... INTRODUCTION TYPES OF MANUFACTURING EVOLUTION OF COMPUTER INTEGRATED MANUFACTURING CIM HARDWARE AND CIM SOFTWARE NATURE AND ROLE OF THE ELEMENTS OF CIM SYSTEM DEVELOPMENT OF CIM PRODUCT DEVELOPMENT...

Ngày tải lên: 08/04/2014, 10:34

... motivation of this book consists of using a wide range of case studies to teach generic creative issues, but incorporated in the framework of a technology of industrial significance Computer simulation ... for analysis of reactions and separations Most of the case studies make use of chemical reactor design by kinetic modeling A distinctive feature of this book is the integration of design and ... petrochemistry to polymers and biofuels The selection of processes was confronted with the problem of availability of sufficient design and technology data The development of the flowsheet and its integration...

Ngày tải lên: 01/04/2014, 10:41

... Levels of the Factor of Machine… 52 Table 4.7 MiniTab Multiple Comparison on the Levels of the Factor of Cutter…… 54 Table 4.8 MiniTab Multiple Comparison on the Levels of the Factor of Material… ... situation of one-off, very small-batch manufacturing of parts with complicated geometric features, such as aerospace and aircraft parts, inserts of dies and moulds Furthermore, most of the computerization ... Table of Contents Appendix C-5 A Code of Each Feature 113 Appendix C-5 B Code of Each Feature 114 Appendix C-6 Main Cavity of Injection Mould 4319 114 Appendix C-7 Input Part Information of Injection...

Ngày tải lên: 16/09/2015, 12:35

... PHẦN 2: CÔNG NGHỆ CAE - Tổng quan 1.1 Khái qt thuật ngữ CAE Abbreviation of computer- aided engineering, computer systems that analyze engineering designs Most CAD systems have a CAE component, ... CAE systems are able to - simulate a design under a variety of conditions to see if it actually works CAE thuật ngữ viết tắt cụm từ "Computer Aided Engineering" dịch tiếng Việt "Mơn cơng nghệ ... phận “nhạy cảm” cản xe sản xuất theo mẫu vẽ sẵn Khơng có điều kiện thử nghiệm thực tế Sự trợ giúp computer dừng lại lĩnh vực CAD Muốn sản phẩm đạt tiêu chuẩn an tồn cần phải thực nghiệm, tính tốn...

Ngày tải lên: 27/04/2013, 20:25

... highlights all of the part geometry in the graphics window From Edit pull down menu, select the Mirror Tool Pick the left surface of the part as Mirror plane Click 14 CHANGE THE COLOR OF ARM BRACKET ... to the reference and an offset value appears in the graphics window Pick this surface as placement surface 11 Drag the reference handles onto the right and top surfaces of the part The handle ... and top surfaces of the part The handle snaps to the reference and an offset value appears in the graphics window Change the offset values as shown in the figure Horizontal: 10 Vertical: 12.5 This...

Ngày tải lên: 27/10/2013, 17:15

... is the number of samples of the i th class in the kth interval of the j th attribute Mij is the number of samples of the i th class in the j th attribute From a physical point of view, it represents ... pick 2/3 of the samples Sequentially pick 1/2 of the samples Sequentially pick 2/3 of the samples All samples The other 1/2 of the samples The other 1/3 of the samples The other 1/2 of the samples ... In other words, the probability of an event describes the possibility of occurrence of the event while the fuzzy degree describes the uncertainty of appearance of the event It is interesting to...

Ngày tải lên: 13/12/2013, 01:15

... abstraction of manufacturing processes The In-Process Part Features The concept of part features originated in computer automated process planning of machined parts, but the majority of the work ... providing a body of concepts and techniques for dealing with modes of reasoning which are approximate rather than exact The objective of fuzzy set is to generalise the notions of a set and propositions ... minimum cost of machining and minimum number of machines and tools, to select a set of process plans Bhaskaran [1990] uses a different model which considers more factors such as flow rate of parts,...

Ngày tải lên: 13/12/2013, 01:15

... of screws or other items in plates of different sizes, screws fastening, withdrawal of subassemblies, recognition and positioning of parts/sub-assemblies, check of parts presence, fastening of ... coefficient of machinery Because of the irregular supply of subassemblies and the stochastic rejection of parts, the number of empty pallets varies during the work-shift, as well as the number of rejects ... measurement of plant performance and the comparison of current figures against the expected levels of efficiency To offer this decision aids, functional modelling and expert simulation of the manufacturing...

Ngày tải lên: 13/12/2013, 01:15

... as direct consequence of this idea of utilizing the DEDS formulation to define the kernel of a generic software driving the dynamics of the actual FMS Inspired by the works of Naylor and Volts [15], ... reuse of existing software (e.g., planning software, software managing hardware at the SF level, following-up software, data base management system, etc.) is a valuable objective The role of the ... the FMS control software both in terms of a hierarchy of control levels and in terms of content of the component objects Then in the following we specify [5]: • The location of the FMS controller...

Ngày tải lên: 13/12/2013, 01:15

... quality characteristic (QC) is a measure of quality on a product or service Examples of QC are weight of a juice can, length of a cylinder part, the number of errors made during payroll operations, ... The implementation of the scheme is as follows When an NN-1’s output exceeds the cutoff point, the current out -of- control sample of five measurements and the previous sample of five measurements ... shifts The performance of the proposed method is comparable to that of the other control charts for detecting variance changes as well as being capable of estimating the magnitude of the variance change,...

Ngày tải lên: 22/12/2013, 21:18

... discussion on the topic of parameter design, see Nair [1992] 17.1.1 Classification of Parameters A block diagram representation of a product/process is shown in Figure 17.1 A number of parameters can ... Limitations of Existing Off-Line Parameter Design Techniques Whatever the method of design, in general, parameter design methods not take into account the common occurrence that some of the uncontrollable ... instants during the life of the product/process Given the level of the uncontrollable variable at any instant, the thick line represents the response as a function of the level of the controllable...

Ngày tải lên: 22/12/2013, 21:18

... (16.24) the degree of the spindle speed variable, the degree of the feed rate variable, the degree of the depth of cut variable, the degree of the vibration variable, the degree of the surface roughness ... process of learning and the process of recalling 16.2.1.1 The Learning Process Step Given network parameters: Set all the necessary parameters, such as the number of input neurons (i), the number of ... representations of the machined surface; however, the effect of flexibility of the cutter-workpiece system was not considered in this model Montgomery and Altintas [1991] presented the effects of the cutter-workpiece...

Ngày tải lên: 22/12/2013, 21:18

... constituent part of the AE signal at the frequency band The mean values of the constituent parts of the AE signal of each frequency band can be represented by the energy level of the AE signal ... 15.3 Basically, the idea of backpropagation (BP) is used to find the errors of node outputs in each layer Without any loss of generality, the detailed learning processes of a single layer for clarity ... close-packet wavelet of short length Given a time varying signal f(t), wavelet transforms (WT) consist of computing a coefficient that is the inner product of the signal and a family of wavelets In...

Ngày tải lên: 22/12/2013, 21:18

... to the order of these OPTs in string-2 Copy the left side of string-2 to form the left side of offspring-2 The right side of offspring-2 is constructed by the OPTs in the right side of string-2 ... the cut point Copy the left side of string-1 to form the left side of offspring-1 The right side of offspring-1 is constructed by the OPTs in the right side of string-1 and their sequence is ... executed first, the validity of OPMs and a sequence of OPMs is discussed as follows: Validity of a sequence of OPMs (OPMs selection first) — The validity of a sequence of OPMs refers to the PRs among...

Ngày tải lên: 25/12/2013, 19:15

... knowledge of the knowledge base consists of (a) selection of operations, (b) operation sequencing, (c) selection of tools, (d) selection of machining conditions, and (e) generation of tool paths ... selection of inserts ; selection of machining conditions ; generation of tool paths ; query of the attempt to fire the rule The inferencing mechanism is fired by backward chaining via the THEN part of ... series of enabling patterns ; define machinable features, stock size, etc ; selection of internal operations ; selection of external operations ; assignment of operation sequence ; selection of toolholders...

Ngày tải lên: 25/12/2013, 22:15

... Create co-axial holes of 0.75 inch in diameter on both sides of the part Add the cylindrical portion of the part as shown below The diameter is 1.50 inches, ... extrude to the next surface option Note that the radius of the round is 0.2 inch Make the following cut on the cylinder Round the bottom of the cut with R = 0.05 inch Change the units to IPS (inches-pounds-seconds) ... Mode of Pro/MECHANICA From Applications pull-down menu, select Mechanica and the following window appears Check the units to make sure it is correct Click Continue button if the system of units...

Ngày tải lên: 19/01/2014, 05:20

... trình thí nghiệm CAD set(h,'color',mau,'LineWidth',2); axis equal; end % end of for hold off; axis off end % end of if Sinh viên kiểm chứng lại hoạt động hàm, ví dụ: >>help vdcongdb >>vdcongdb(1,5,’Becnulli’) ... luoi Sau thu đồ thị hàm y1, để vẽ y2 đồ thị, ta thực hiện: >>hold on %giu hinh, mac nhien la hold off >>y2=sin(x.^2); %luy thua tung phan tu >>plot(x,y2,’k’) %duong ve co mau den >>axis([0 4*pi ... Sinh viên thử vẽ hình sau (Hình 1.8): (Hình 1.8) Từ cửa sổ lệnh Matlab, nhập: demos Chọn MATLAB → Graphics → 3D-plots Chạy chương trình demo © TcAD - 2003 12 Giáo trình thí nghiệm CAD Bài HÀM VÀ...

Ngày tải lên: 21/01/2014, 03:20

... through a manipulation of data within the software The results of all of these types of analyses are typically available in many forms, depending on the needs of the designer All of these analytical ... Mainframes • Minicomputers • Microcomputers Supercomputers are the world's most powerful computers, often with processing speeds in excess of 20 million computations per second The performance of the CRAY-2 ... hardware made general use of interactive computer graphics uneconomical until the 1970s With the development and subsequent popularity of personal computers, interactive graphics applications now...

Ngày tải lên: 23/01/2014, 07:20

... CADSOFTWARE Contemporary CAD software is often sold in "packages" that feature all of the programs needed for CAD applications These fall into two categories: graphics software and analysis software ... computational speed of the CPU 13.8.1 Graphics Software Traditional drafting has consisted of the creation of two-dimensional technical drawings that operated in the synthesis stage of the general ... is one of the advantages of computer- aided design But how does that drawing board operate? The drawing board available through CAD systems is largely a result of the supporting graphics software...

Ngày tải lên: 23/01/2014, 07:20

... approach avoids the use of numerical integration of a new class of fundamental solution sensitivity kernels for the computations of the sensitivity matrices and the sensitivity of boundary conditions ... overall system of equations of BEM can be written similarly to Eq (10) as A0 u0 ¼ B0 v0 , (11) where u0 is the column vector of unknown boundary response, and v0 is the vector of specified boundary ... mid-surface of the part, the numerical quadrature over the surface of the cooling channels is reduced to integration over the axis of cylindrical segments and modeling and meshing of the exterior...

Ngày tải lên: 12/02/2014, 22:20