design of synchronous sequential machines

... Synchronous Machines 395 7.2.11 Synchronous Reluctance Machines 400 7.3 DC Machines 404 7.3.1 Configuration of DC Machines 404 7.3.2 Operation and Voltage of a DC Machine 405 7.3.3 Armature Reaction of ... Shift of Damper Bar Slotting from the Symmetry Axis of the Pole 392 7.2.8 V Curve of a Synchronous Machine 394 7.2.9 Excitation Methods of a Synchronous Machine 394 7.2.10 Permanent Magnet Synchronous ... co-authorship of Professor Tapani Jokinen, who has spent decades in developing the Finnish machine design profession. An important view of electrical machine design is provided by Professor Val ´ eria...

Ngày tải lên: 07/03/2014, 10:20

Ngày tải lên: 05/09/2013, 16:30

... engineering education and of the text Machine Design: An Integrated Approach. He is a Fellow of the Ameri- can Society of Mechanical Engineers and a member of the Society of Automotive Engi- neers. ... Principles of Mechanism in 1841 while a professor of natural philosophy at the University of Cambridge, England. He attempted to systematize the task of mechanism synthesis. He counted five ways of obtaining ... the quality of the design. Commercially available programs such as Working Model* also allow rapid analysis of a proposed mechanical design. The process then becomes one of qualitative design by...

Ngày tải lên: 08/04/2014, 11:35

... hyperplane. 4. SUPPORT VECTOR MACHINES FOR DICHOTOMOUS WOS FILTERS 4.1. Linear support vector machines for dichotomous WOS filters In the above section, the new approach of designing WOS filter has reduced ... applications. In this paper, SVMs are introduced into the design of WOS filters in ordertoimproveperformance. WOS filters are special subset of stack filters. Each stack filter is based on a positive ... marginally im- proved by using the conventional design approach of stack filter or neural network. Although the adaptive neural fil- ter can effectively remove noise of various kinds, including Gaussian noise...

Ngày tải lên: 22/06/2014, 23:20

... the quality of the design. Commercially available programs such as Working Model* also allow rapid analysis of a proposed mechanical design. The process then becomes one of qualitative design by ... motor. There are a myriad of other examples of fourbar coupler curves used in machines and mechanisms of all kinds. One other example of a very different application is that of the automobile suspen- sion ... of the linkage assembly, and its motion is along a set of coupler curves. The orientation of the wheel is also of concern in this case, so this is not strictly a path generation problem. By designing...

Ngày tải lên: 08/08/2014, 12:23

... orientation of the link which contains the point of interest. The coupler curve is made to pass through a set of desired output points. However, it is common for the timing of the arrival of the coupler ... specified. MOTION GENERATION is defined as the control of a line in the plane such that it assumes some sequential set of prescribed positions. Here orientation of the link con- taining the line is important. ... rotation of the input rocker, link 2, through an as yet unspecified angle ~z. Note also that the angle of the coupler link 3 at each of the precision positions is defined by the angles of the position...

Ngày tải lên: 08/08/2014, 13:20

... moving centrode at one extreme of its path motion (i.e., at one of the positions ofh,3), then it will have a cusp in its coupler curve. Figure 6-17b shows a coupler curve of such a point, drawn with program ... linkage. All of the coupler curves of points on link 3 will have the same path shapes as in the orig- inallinkage. We now have, in effect, a "linkless" fourbar linkage, really one composed of ... example shown in Figure 6-14 is a non-Grashof fourbar. The lengths of its centrodes are limited by the double-rocker toggle positions. All instant centers of a linkage will have centrodes. If the...

Ngày tải lên: 08/08/2014, 13:20

... choice of displacement function. In fact, the cam designer should not be as concerned with the displacement function as with its higher derivatives. The Fundamental law of Cam Design Any cam designed ... further evidence of the folly of our earlier naive approach to earn design which dealt exclusive- ly with the displacement function. The earn designer must be concerned with the higher derivatives of displacement. ... delta functions, appearing in the derivative of acceleration, jerk. Thus the corollary merely restates the fundamental law of cam design. Our naive designer failed to recognize that by starting...

Ngày tải lên: 08/08/2014, 13:20

... When designing machinery, we must first do a complete kinematic analysis of our design, as described in Part I of this text, in order to obtain information about the accel- erations of the ... differential element of mass is also shown. The mass moment (first moment of mass) of the differential element is equal to the product of its mass and its distance from the axis of interest. With ... the masses of all the moving parts which have these known accelerations. These parts do not exist yet! As with any design prob- lem, we lack sufficient information at this stage of the design to...

Ngày tải lên: 08/08/2014, 13:20

... velocity of 50 rad/sec. The torque varies a great deal within one cy- cle of the mechanism, going from a positive peak of 341.7 Ib-in to a negative peak of -166.41b-in. The average value of this ... of designs in a short time. There are infinities of viable solutions to these problems. Iterate to find the best one! All links must be designed in detail as to their geometry (mass, moment of ... magnitude and angle of the counterweight's mR vector. Note that the angle of the mR vector for each link will be referenced to that link's line of centers. Design the shape of the physical...

Ngày tải lên: 08/08/2014, 13:20

... velocity of 50 rad/sec. The torque varies a great deal within one cy- cle of the mechanism, going from a positive peak of 341.7 Ib-in to a negative peak of -166.41b-in. The average value of this ... magnitude and angle of the counterweight's mR vector. Note that the angle of the mR vector for each link will be referenced to that link's line of centers. Design the shape of the physical ... Berkof, [1] and Lowen, Tepper, and Berkof [2] give compre- hensive reviews of the literature on this subject up to 1983. Additional work has been done on the problem since that time, some of which...

Ngày tải lên: 08/08/2014, 13:20

Ngày tải lên: 08/08/2014, 13:20

Ngày tải lên: 08/08/2014, 13:20

Ngày tải lên: 08/08/2014, 13:20

... 1 - 2 Overview of the Program 1 Overview of the Program SAP2000 is a stand-alone finite-element-based structural program for the analysis and design of civil structures. It offers an intuitive, ... Property Type for Add area of the form. Scroll down the list of import options until you find Import Double Angle – see Figure 7. Single click on it. D. In the Click to area of the Frame Properties ... to read this manual on your computer screen. During the course of this tutorial, we will explore many of the basic fea- tures of SAP2000. Prepare to spend at least one hour going through this...

Ngày tải lên: 06/09/2012, 15:56

... Select Mode. 24. Click the roof beam at the top of the braced frame to select it. Also click the joint at the top of the chevron brace (center of braced frame roof beam) to select it. 25. From ... C-10 to enter the last roof beam. The model now appears as shown in Figure C-11. Figure C-11: Model After All Roof Level Beams Have Been Drawn 18. Select all of the roof level frame elements and ... Span Loads Used In SAP2000 Model Roof Beams 39, 40, 51, 52 0.40 klf DL 0.12 klf LL Roof Beams 41/44, 42, 47/50, 49 Roof Beams 45, 46 0.48 klf DL 0.24 klf LL Roof Beams 43, 48 Second Floor Beams...

Ngày tải lên: 06/09/2012, 15:56

... being designed for a small office building with a total live load of 250 kips and dead load of 500 kips. Find: (a) the depth D f for a fully compensated foundation, (b) the depth D f if a soft ... of the clay layer, z/B = 18 ft / 40 ft = 0.45 and L/B = 60 ft / 40 ft = 1.50 2) At the middle of the clay layer, z / B = 22 ft / 40 ft = 0.55 and L/B = 60 ft / 40 ft = 1.50 3) At the bottom of ... 0.25 eo = 0.9 density (sat) = 119 pcf Example 4. Design the steel lying in the East-West direction of the mat shown below with external dimensions of 42 feet by 74 feet. The columns are all 15”by...

Ngày tải lên: 16/10/2012, 10:43

Ngày tải lên: 17/08/2013, 11:41

Ngày tải lên: 05/09/2013, 14:58

Ngày tải lên: 05/09/2013, 14:58