DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 4 pptx

... 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

... 2 and 4, 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 also the locations of the fixed ... 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 equat...

Ngày tải lên: 08/08/2014, 13:20

... the fixed and moving centrodes for any linkage input to it. Input the datafiles F06-l4.4br, F06-15aAbr, and F06-l5bAbr into program FOURBARto see the centrodes of these linkage drawn as the linkages ... 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...

Ngày tải lên: 08/08/2014, 13:20

... the next step is to size the cam. There are two major factors which affect cam size, the pressure angle and the radius of curva- ture. Both of these involve either the base circle radius on the ... 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...

Ngày tải lên: 08/08/2014, 13:20

... any design prob- lem, we lack sufficient information at this stage of the design to accurately determine the best sizes and shapes of the parts. We must estimate the masses of the links and other parts ... 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 p...

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

... one to the other, in order to stagger the mo- tions of the pistons in time. It should be apparent from the discussion of shaking forces and balancing in the previous chapter that we would like to ... the program. These are noted in the text. The student is encouraged to investigate these ex- amples with program ENGINE in order to develop an understanding of...

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