DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 9 docx

... used in machines and mechanisms of all kinds. One other example of a very different application is that of the automobile suspen- sion (Figure 3- 19) . Typically, the up and down motions of the car's ... 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 powe...

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 ... 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 link...

Ngày tải lên: 08/08/2014, 13:20

... 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 ... 2 is the driver, and 8z and OOz are given for the "freeze frame" position shown. We wish to solve for 004, the angular velocity of link 4, and al...

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

... 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 of the design in order to make a first pass at the calculation. ... golf club. In the case of our mallet example, a center of percussion at the head corresponds to a center of rotation near the end of th...

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

... 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 and insight to the subtleties of this topic. ... 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...

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 ... attributed to some of the machines that we ourselves have invented. Then, in chapter 9, I discuss various accounts of how intelligent sub- jects put their kn...

Ngày tải lên: 01/11/2013, 07:20