sensors actuators and other control system components

... OPERATING SYSTEMS AND ENVIRONMENTS 103 5.1 5.2 5.3 5.4 5.5 INTRODUCTION OPERATING SYSTEM (OS) COMPARISON OF COMMANDS IN POPULAR OPERATING SYSTEMS UNIX - OPERATING SYSTEM ARCHITECTURE OF UNIX SYSTEM ... 15.8 NETWORKING STANDARDS AND THEIR DEVELOPMENT 15.9 EXAMPLES OF NETWORK STANDARDS 15.10 ETHERNET 15.11 ISSUES IN INTER -SYSTEM COMMUNICATION 15.12 NETWORK OPERATING SYSTEMS 15.13 SYSTEM SECURITY ... develop suitable control systems, drives and programming techniques for machine tools using electronic control The first major innovation in machine control is the Numerical Control (NC), demonstrated...

Ngày tải lên: 08/04/2014, 10:34

... adopting the approach of process systems This consists of a systemic viewpoint in problem analysis supported by systematic methods in process design A systematic and systems approach has at least ... this type of units, performance and connections by material and energy streams Systemic techniques are capable of calculating optimal targets for subsystems and components without the need of ... consists mainly of the reaction and separation subsystems Other issues solved at this level are safety and hazards, environmental targets, plantwide control objectives and preliminary economic evaluation...

Ngày tải lên: 01/04/2014, 10:41

... variable control charts are used The most commonly used variable control charts include: • Average and Range (X bar and R) Charts • Average and Standard Deviation (X bar and S) Charts • Individual and ... Diagram, and Scatter Diagram were developed and combined with the Control Chart in quality and process control, which are deemed as the “Magnificent Seven” Control Chart is the most effective and ... A computer-aided part and process information retrieval and trace-back system 24 Chapter Injection Mould Components and Manufacturing CHAPTER INJECTION MOULD COMPONENTS AND MANUFACTURING Injection...

Ngày tải lên: 16/09/2015, 12:35

... computer systems that analyze engineering designs Most CAD systems have a CAE component, but there are also independent CAE systems that can analyze designs produced by various CAD systems CAE systems...

Ngày tải lên: 27/04/2013, 20:25

... element The handle snaps 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 ... pick TOP datum plane, and set Orientation to Top Then click the Sketch button Click the Close button in the References dialog box Click the small forward > icon to expand, and pick Draw a horizontal ... section as shown below , , , , , Click Type in 40 for the depth of extrusion Click Click and select Standard Orientation CREATE BOTH SIDES CUT Pick the Extrude Tool icon Click the Remove Material...

Ngày tải lên: 27/10/2013, 17:15

... on a complete understanding of the process, the sensors, and the sensor signals Use of effective sensors is often the most effective and costeffective way for monitoring and diagnosis Also, signal ... false, and u stands for uncertain) Let mg = {Li: li} and mg′ = {Mi: mi} and form a matrix {( } ) ( M = T Li / M j : li m j , where T Li / M j )  t if M j ⊆ Li    =  f if M j ∩ Li = O   u otherwise ... should be aware that, like other monitoring and diagnosis methods such as neural networks and expert systems, fuzzy set theory is not a universal solution that can plug -and- play Instead, successful...

Ngày tải lên: 13/12/2013, 01:15

... research and, thus, it spawned considerable CAPP system development in both academic community and industrial world The last two decades saw a proliferation of research publications and system ... group technology (GT) and the generative approach based on decision trees, decision tables, logic formulae, knowledge bases, and expert systems [Chang and Wysk, 1985], [Alting and Zhang, 1989], [Gupta, ... ever met such demands Most of the CAPP systems in use have not gained anticipated computing support and flexible planning functions and tools [Bhaskaran, 1990], [Larsen, 1993], [Zhao and Baines, 1994],...

Ngày tải lên: 13/12/2013, 01:15

... concurrent parts feeding systems and dedicated joining devices; and • assembly stand, namely, a workstation with piece placing and parts feeding fixtures, pick-andplace mechanisms, and joining units ... assembly stations with related parts and fixtures logistics and robotics; and • assembly cell: a servoed and fixtured posture, with appropriate feeding systems and one (or more) instrumental robots ... design, manufacturing, and finance systems To reach more comprehensive assessments, issues are stated by collecting and comparing properly standardised indices and by tracking and acknowledging properly...

Ngày tải lên: 13/12/2013, 01:15

... Turchiano, B., 1996, System approach to design generic software for real-time control of flexible manufacturing systems, IEEE Trans Systems, Man and Cybernetics — Part A: Systems and Humans, vol 26, ... on Systems, Man, and Cybernetics, vol 16, no 3, pp 321–334 [15] Naylor, A.W., and Volts, R A., 1987, Design of integrated manufacturing system control software, IEEE Trans on Systems, Man, and ... LOS(jk) and ROS(jh) ϭ ROS (jk) and JSTATUS(jh) ϭ Ready for assembling and SCI(jh) ϭ 0} and {for each w␲␦ ʦ W | w␲␦ ϭ w␲␣ and (w␲␦, w␲␤) ʦ A ᭚ WEI [(w␲␦, w␲␤)] jobs jh | BEL-P[LOS( jh)] ϭ w␲␦ and...

Ngày tải lên: 13/12/2013, 01:15

... mean, and plot it against a control chart with three lines If both µ and σ are known, the centerline is µ with lower control limit µ – σ and upper control limit µ +3 σ If CLT n n holds and the ... outside the control limits, which indicates an out-of -control condition A pair of control charts are often used simultaneously to monitor QC x — one for the mean µ and the other for the standard deviation ... neural fuzzy system for monitoring both process mean and variance shifts, provide guidelines and examples for using this system, and list the properties 18.3 A Hybrid Neural Fuzzy Control Chart...

Ngày tải lên: 22/12/2013, 21:18

... distinct control loops The process control loop “maintains” the controllable variables at the optimal levels, and will involve schemes such as feedback control, feedforward control, and adaptive control ... variable to the controllable and uncontrollable variables is linear in parameters and involves no higher order terms However, as Pledger pointed out, if the model involves quadratic terms or other higher ... the nature of the relationship between the different controllable and uncontrollable variables and the quality response characteristics, and allow multiple quality response characteristics In...

Ngày tải lên: 22/12/2013, 21:18

... surfaces exhibit interrelated characteristics of both random and deterministic components Zhang and Kapoor [1991] demonstrated the effect of random vibrations on surface roughness in the turning ... to provide an adaptive control mechanism, ISRR systems require two major components: (i) sensors, which receive the dynamics signal from the machining cutting processes; and (ii) an intelligent ... training and testing 16.4.2 ISRR-FN System The structure of the ISRR-FN, as shown in Figure 16.8, consisted of the sensing system, machining parameters, and ISRR-FN In this sensing system, an...

Ngày tải lên: 22/12/2013, 21:18

... conditions and the monitoring features 15.2 Fuzzy Neural Network 15.2.1 Combination of Fuzzy System and Neural Network Fuzzy system (FS) and neural networks (NN) are powerful tools for controlling ... Condition Monitoring in Metal Cutting, in Dynamic Systems and Control (vol 2) American Society of Mechanical Engineers, Dynamic Systems and Control Division, vol 55, no 2, pp 931-938 Martin, ... feasibility of motor power and current sensing for adaptive control and tool condition monitoring has been described [29] Mannan and colleagues recommend using the spindle and feed current measured...

Ngày tải lên: 22/12/2013, 21:18

... randomly selected from M-c and M-e and assigned to OPT3 to replace M-a It is then found that M-a is also the current machine used by OPT1, OPT4, OPT5, and OPT2 Among these OPTs, OPT1, OPT4, and ... can be traversed, or in other words, operations sequence randomization can be performed On the other hand, the solution space formed by the alternative machines, tools, and TADs for OPTs is traversed ... information (machines, tools, and all the cost indices) is described earlier and the required OPTs and their machine, tool, and TAD alternatives are shown in Table 9.2 and the PRs between the OPTs...

Ngày tải lên: 25/12/2013, 19:15

... work-holding devices which include face plates and fixtures, mandrels, jaw-type chucks, step chucks, collets, and magnetic and vacuum chucks The architecture of the system that has been developed in this ... ‘delta) (and (>= roughness 4) (cond ( (and (= tolerance 0.04)) t) ( (and (= tolerance 0.048)) t) ( (and (= tolerance 0.058)) t) ( (and (

Ngày tải lên: 25/12/2013, 22:15

... 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 is correct and consistent From Model Type ... for defining the load and since we will use Total Load at Point (TLAP) and Moment, the location does not matter Click on Datum Point Tool icon Pick on the surface (region), and locate the point ... procedure and select View Min 17 Click the Copy button 18 Enter the name as “displ” Enter the Title of Displacement Distribution Plot Click the Quantity tab, and change the type to Displacement, and...

Ngày tải lên: 19/01/2014, 05:20

... r=a*cos(theta)+1; otherwise error('Chon: ''Becnuli'', ''Aristod'' hoac ''Xoanoc''') end % end of switch % ve thi close all; figure('Color','w'); for k=1:m hold on r1=r*k; mau=[rand(1,1) rand(1,1) rand(1,1)]; ... toolbox hàm cách thức sử dụng chúng help % chuc nang toolbox >>help control % liet ke ham cua control toolbox help % chuc nang ham >>help plot % chuc nang ham plot Ta ... thị: >>xlabel(‘Time’) >>ylabel(‘Amplitude’) >>title(‘y1=sinx.cos2x and y2=sin(x^2)’) >>legend(‘sinx.cos2x’,’sinx^2’) y1=sinx.cos2x and y2=sinx sinx.cos2x sinx Amplitude 0.5 -0.5 -1 Time Hình 1.1...

Ngày tải lên: 21/01/2014, 03:20

... resources and memory space and provides monitoring and security functions It governs the execution and operation of various system programs and applications such as compilers, databases, and CAD ... minicomputer systems, and on-line printers for minicomputer systems are capable of delivering between two and three thousand lines of text per minute Microcomputers, which include the personal computer and ... dynamic, stress (both linear and non-linear), and fluid analyses are available for use with SPP computers 13.4 MEMORYSYSTEMS Memory systems store program information and other data in a manner that...

Ngày tải lên: 23/01/2014, 07:20

... management, and other operating system functions (I/O devices, signals) through system calls System calls can be grouped into three categories: file manipulation, process control, and information ... application that is run on the NT operating system 13.7.2 Graphical User Interface (GUI) and the X Window System DOS, UNIX, and other command-line operating systems have long been criticized for the ... in 2D or 3D, can be ambiguous and difficult to understand Because mechanical and other engineering designs often involve three-dimensional parts and systems, CAD systems that offer 3D representation...

Ngày tải lên: 23/01/2014, 07:20

... the new best point x0, and set f ðx0 Þ ¼ f ðxk Þ and go to step (iv) Otherwise, generate a random number bA[0,1] and calculate the probability as START Set start point and control parameters p ... containing heat fluxes at all the nodes H and G are two matrices containing the integration constants To solve system (9), boundary conditions must be specified and system (9) needs to be reordered in ... multiplier method and Davidon–Fletcher–Powell method [10] In this paper, a new systematic computer-aided approach is developed for cooling system optimal design Compared with the work done by other researchers...

Ngày tải lên: 12/02/2014, 22:20