fundamentals of logic design with vhdl
Tài liệu Logic Design with VHDL doc
Ngày tải lên :
12/12/2013, 09:16
... S
6
have NS S
0
)
II. (1,2) (3,4) (5,6) (S
1
& S
2
are NS of S
0
; S
3
& S
4
are NS of S
1
;
and S
5
& S
6
are NS of S
4
)
III. (0,1,4,6) (2,3,5)
Figure 1-18(a)
State Assignment ... XY'Cin' + XYCin = X + Y + Cin
Figure 1-9 Elimination of 1-Hazard
0 1
0
1
10
1
0
10
01
00
11
10
A
BC
C
B
A
F
A
F = AB' + BC + AC
(c) Network with hazard removed
C
E
B
A
D
F
0 1
0
1
10
1
0
10
01
00
11
10
A
BC
F ... default
end DFF;
architecture SIMPLE of DFF is
begin
process (CLK) process is executed when CLK changes
begin
if CLK = '1' then rising edge of clock
Q <= D after 10 ns;
QN <=...
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Fundamentals of Machine Design P34
Ngày tải lên :
18/10/2013, 09:15
... values of C’s are tabulated in Table 1 below.
Table 1. Values of C for various types of joints
Type of joint Value of C
Metal to metal joint with through bolt 0.00 – 0.10
Soft copper gasket with ... should learn:
ã Design of a bolted joint with fluctuating loading
ã Design of welded joints with variable loading
1. Variable loading in mechanical joints:
Machine parts are often subjected ... with variable loading:
Because of many intricacies involved in design of a welded joint, codes are
extensively used to design such joint when it experiences variable loading.
The value of...
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Fundamentals of Machine Design P37
Ngày tải lên :
25/10/2013, 12:15
... Nomenclature of Open Belt Drive
d
L
- Diameter of the larger pulley
d
S
– Diameter of the smaller pulley
α
L
- Angle of wrap of the larger pulley
α
S
– Angle of wrap of the smaller ... What are the advantages of a belt drive?
A1. The advantages of a belt drive are that, it can absorb a good amount of
shock and vibration. It can take care of some degree of misalignment
between ... velocity of the pulley m is the mass of the belt of unit
length,
m = btρ
(13.1.4)
where, b is the width, t is the thickness and ρ is the density of the belt material.
From the equation of...
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Fundamentals of Machine Design P38
Ngày tải lên :
25/10/2013, 12:15
...
Coefficient of friction of the belt material
Coefficient of friction for a pair of belt material and pulley material is provided in
design data book.
13.2.4 Modification of Belt stress ...
The decision of the material to be used depends on the type of service.
No. of ply and Thickness
Ply is the number of layers as indicated earlier. Therefore, the number of ply is
decided ...
At the end of this lesson, the students should be able to understand:
ã Features of flat belt drives
ã Flat belt materials
ã Flat belt stresses and its specifications
ã Types of design factors...
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Fundamentals of Machine Design P39
Ngày tải lên :
29/10/2013, 19:15
... side of
the given range.
Another restriction of choice of belt section arises from the view point of minimum
pulley diameter. If a belt of higher thickness (higher section) is used with ... from the design table, is the required belt length.
From section (13.3.7) above, the design power and modified power rating of a
belt can be obtained. Therefore,
Design Power
Number of belts
Modified ... end of this lesson, the students should be able to understand:
ã Features of V-belt drives
ã Nomenclature of V-belt, types of V-belt section and its power rating
ã Selection procedure of...
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Fundamentals of Machine Design P40
Ngày tải lên :
29/10/2013, 19:15
... hydrodynamic theory of lubrication
Petroff (1883) carried out extensive experimental investigation and showed the
dependence of friction on viscosity of lubricant, load and dimensions of the
journal ... of bearings
Comparison of bearing friction characteristics
Basics of hydrodynamic theory of lubrication
Design methods for journal bearings
14.1.1 Brief overview of bearings
Bearings ... of design zone
Coefficient of friction, f
Bearing characteristic number,
N
p
μ
Boundary lubrication
Hydrodynamic
lubrication
A
B
C
D
Design lower limit
Fig. 14.1.5 Results of...
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Tài liệu Circuit design with VHDL ppt
Ngày tải lên :
12/12/2013, 11:16
... standard of library std: Defines BIT, BOOLEAN, INTEGER, and REAL
data types.
Package std _logic_ 1164 of library ieee: Defines STD _LOGIC and STD_ULOGIC
data types.
Package std _logic_ arith of library ... conv_signed(p, b), and conv_std _logic_ vector(p, b).
Packages std _logic_ signed and std _logic_ unsigned of library ieee: Contain functions
that allow operations with STD _LOGIC_ VECTOR data to be performed ... 0) OF STD _LOGIC;
1D array
TYPE array1 IS ARRAY (0 TO 3) OF row;
1Dx1D array
TYPE array2 IS ARRAY (0 TO 3) OF STD _LOGIC_ VECTOR(7 DOWNTO 0);
1Dx1D
TYPE array3 IS ARRAY (0 TO 3, 7 DOWNTO 0) OF...
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Tài liệu Fundamentals of Machine Design P1 pdf
Ngày tải lên :
17/12/2013, 11:15
...
building design, process design, bridge design, clothing or fashion design and so
on.
Here we are concerned with machine design. We now define a machine as a
combination of resisting bodies with ... fail in
use within its designed life. There is no single answer to this and an
overall safe design approach at every stage of the design is needed. Use of
factor of safety in designing the ...
Q.4: Discuss ‘factor of safety ‘ in view of the reliability in machine design.
A.4: Reliability of a designed machine is concerned with the proper functioning
of the elements and the machine...
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Tài liệu Fundamentals of Machine Design P2 ppt
Ngày tải lên :
17/12/2013, 11:15
...
1) Design of machine elements by M.F.Spotts, Prentice hall of India,
1991.
2) Machine design- an integrated approach by Robert L. Norton,
Pearson Education Ltd.
3) A textbook of machine design ... and brass. Bronze is a Cu-Sn
alloy with the typical composition of 88% Cu, 10% Sn and 2% Zn. Brass is a
Cu-Zn alloy with the typical composition of red brass of 85% Cu , 15% Zn.
Q.6: List at ... springs etc.
1.2.8 Summary of this Lesson
In this lesson the properties and uses of different types of metals and non-
metals, generally used in machine design, are discussed. Primarily...
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Tài liệu Fundamentals of Machine Design P3 pptx
Ngày tải lên :
17/12/2013, 11:15
... two mating parts fit with each other, the nature of fit is
dependent on the limits of tolerances and fundamental deviations of the mating
parts. The nature of assembly of two mating parts is ... The nature of assembly of two mating parts is defined by three types of fit
system, Clearance Fit, Transition Fit and Interference Fit.
Clearance Fit: In this type of fit, the shaft of largest ... or
manufacture a product range. The range of operational speeds of a
machine or the range of powers of a typical machine may be also as per a
series of preferred numbers.
Version 2...
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Tài liệu Fundamentals of Machine Design P4 pdf
Ngày tải lên :
17/12/2013, 11:15
... that the state of stress
at a point can be given by six stress components only. It is important to
understand the implication of this state of stress at a point in the design of
machine elements ... bending of beams
We consider that a plane section remains plane after bending- a basic
assumption in pure bending theory.
If the rotation of cd with respect to ab is d
φ
the contraction of a ... loaded brass strut hinged at both ends is 1m long and is of a
square cross-section of sides 20mm. What should be the dimension of a
steel strut of the same length and subjected to the same axial...
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Tài liệu Fundamentals of Computer Design docx
Ngày tải lên :
22/12/2013, 10:16
... version of the program, version of
compiler, optimizing level of compiled code, version of operating system,
amount of main memory, number and types of disks, version of the CPU—all of
which ... 1 Fundamentals of Computer Design
packaging, power, and cooling. Optimizing the design requires familiarity with a
very wide range of technologies, from compilers and operating systems to logic
design ... Chapter 1 Fundamentals of Computer Design
Assume that the two design alternatives are to reduce the CPI of FPSQR
to 2 or to reduce the average CPI of all FP operations to 2. Compare these
two design...
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Tài liệu Fundamentals of Machine Design P5 doc
Ngày tải lên :
25/12/2013, 23:18
...
At the end of this lesson, the student should be able to understand
ã Elements of force system at a beam section.
ã Superposition of axial and bending stresses.
ã Transformation of plane stresses; ...
section X-X, Q the first moment of area, I the moment of inertia, t the width at
which transverse shear is calculated, J the polar moment of inertia and r the
radius of the circular cross-section. ...
beam with a central vertical load P and an axial compressive load F. At any
section a compressive stress of
π
2
4F
d
and a bending stress of
My
I
are
produced. Here d is the diameter of the...
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Tài liệu Fundamentals of Machine Design P6 pptx
Ngày tải lên :
25/12/2013, 23:18
... strains may be derived in terms of these displacements.
2.3.2 Normal strains
Consider an element AB of length δx ( figure-2.3.2.1). If displacement of end A is
u, that of end B is
u
u
x
∂
+δ
∂
x
...
discussed.
2.3.9 Reference for Module-2
1) Mechanics of materials by E.P.Popov, Prentice hall of India, 1989.
2) Mechanics of materials by Ferdinand P. Boer, E. Russel Johnson, J.T
Dewolf, ... principal strains in terms of
principal stresses as
[]
[]
[]
1123
223
3312
1
()
E
1
()
E
1
()
E
ε= σ−νσ+σ
ε= σ−νσ+σ
ε= σ−νσ+σ
1
From the point of view of volume change or dilatation...
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Tài liệu Fundamentals of Machine Design P7 docx
Ngày tải lên :
25/12/2013, 23:18
...
based on a particular failure criterion. Theories of failure are essentially a set of
failure criteria developed for the ease of design.
In machine design an element is said to have failed if it ... Summary of this Lesson
Different types of loading and criterion for design of machine parts
subjected to static loading based on different failure theories have been
demonstrated. Development of ... properties.
3.1.3 Theories of failure
When a machine element is subjected to a system of complex stress system, it is
important to predict the mode of failure so that the design methodology may...
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