DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 7 potx

... on it to the product to the next work station where it again stops for another operation to be per- the Atheneum Club in formed. The forces and power required to accelerate and decelerate the large ... suit- ed to the problem and is a form of qualitative synthesis. t This is perhaps the most diffi- cult task for the student as it requires some experience an...

Ngày tải lên: 08/08/2014, 12:23

... using the approach of equations 5. 27 and 5.18, by changing W to U and Z to S and using the definitions of the constants given in equation 5.30 in equation 5. 27. It should be apparent that there ... respectively) on the coupler (link 3). We wish to solve for the coordinates of vectors W, Z, D, and S, which define not only the lengths of those links but als...

Ngày tải lên: 08/08/2014, 13:20

... wish to solve for 004, the angular velocity of link 4, and also for the velocity of slip at the joint labeled A. In Figure 6-18 the axis of slip is shown to be tangent to the slider motion and ... is the line along which all sliding occurs between links 3 and 4. The axis of transmission is defined to be perpendicular to the axis of slip and pass thr...

Ngày tải lên: 08/08/2014, 13:20

... side and high dwell on the other, note that the velocity function is multivalued. There are discontinuities at these boundaries. The effect of these discontinuities is to create a portion of the ... of value to the man- ufacturer of the earn who needs its coordinate information in order to cut the earn. FALL FUNCTIONS We have used only the rise portion of th...

Ngày tải lên: 08/08/2014, 13:20

... parts. We must estimate the masses of the links and other parts of the design in order to make a first pass at the calculation. We will then have to iterate to better and better solutions as ... softball with the wrong spot on the bat. The "right place on the bat" to hit the ball is the center of percussion associated with the point that you...

Ngày tải lên: 08/08/2014, 13:20

... us to size the motor to deliver the average torque rather than the peak torque. One convenient and rel- atively inexpensive means to this end is the addition of a flywheel to the system. TORQUE ... the driver (motor) and stored temporarily in the moving links, and the negative pulses of torque as energy at- tempting to return from the links to the dri...

Ngày tải lên: 08/08/2014, 13:20

... us to size the motor to deliver the average torque rather than the peak torque. One convenient and rel- atively inexpensive means to this end is the addition of a flywheel to the system. TORQUE ... the driver (motor) and stored temporarily in the moving links, and the negative pulses of torque as energy at- tempting to return from the links to the dri...

Ngày tải lên: 08/08/2014, 13:20

... placed near the ends of the crankshaft to obtain the largest moment arm possible and thus reduce their size. The shaking force of the 90° vee twin depicted in Figure 14- 27 (p. 677 ) has a rotat- ing ... the length of the balance shafts/crank- shaft being designed. The magnitude and angular locations of the balance masses can then be calculated by the method...

Ngày tải lên: 08/08/2014, 13:20

... as the magnitude and angle of the vector are displayed. The programs also allow alternate presentations of polar plots, showing just the vec- tors, just the envelope of the path of the vector ... change any of the linkage parameters on the Animate screen and then recalculate the results there with the Recalc button. The Done button on either the Input o...

Ngày tải lên: 08/08/2014, 13:20

... experience and the relationship between mental and physical states. Then, in chapters 3 and 4, I move on to discuss certain gen- eral theories of the nature of mental states and some attempts to explain ... philosophical analysis of the concept of seeing: but each will have more credibility to the extent that it is consistent with the other. METAPHYSICS AND...

Ngày tải lên: 01/11/2013, 07:20