EBK NETWORK+ GUIDE TO NETWORKS
8th Edition
ISBN: 9781337671644
Author: ANDREWS
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Question
Chapter 12, Problem 17RQ
Program Plan Intro
Fiber optic cable:
The wire is made up of ultra-thin filaments of glass or plastic material, which is as thin as human hair, and it can carry beam of light.
- The glass fiber is covered with aramid yarn and plastic is covered strongly over it.
- Fiber optic cable is light based, which can carry information optically at the speed of light.
Coaxial cable:
Coaxial cable consists of center copper wire, a plastic wire is insulted over it, and then braided metal shield is grounded over it.
- The shield reduces electromagnetic interference and radio frequency interference; hence, it is used in
computer networks and television cables. - Coaxial cables can carry signals for wide range of frequencies, and hence, it is used for long-distance telephone communication.
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Students have asked these similar questions
Problem 3: Consider the two-link planar elbow manipulator shown below with link information: a₁ = 3,
a₂ = 3.
a2
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0 0 01
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To
(a) Find the location of the end-effector P° if the joint angles are:
0₁ = 140°, 0₂ = 30°
(b) Find the values of joint variables 01, 02 if the robotic manipulator is commanded to reach the desired
location of Pº = [4.5, 3,0]. Notice there are possibly two sets of solutions.
(c) Also sketch the two poses of the robot for the computed joint variables.
Page 5 of 7
Problem 5: The following shows the schematic of a SCARA robot and its DH parameters. Complete the
following questions based on this information.
20
01
21
02.
22
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21
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a1
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The Jacobian matrix of this robot is given below:
-a1S1a2S12
-a2S12
J(q) =
a1c1 + a2c12
0
a2C12
0
10°
(a) For a₁ = 1, a2 = 2, is q = 180° a singularity configuration of this robot?
a1
3
[10°1
(b) For a₁ = 1, a2 = 2, is q = | 0° a singularity configuration of this robot?
3
(c) Consider the following sequence of rotations:
1) Rotate by 130° about the world z-axis
2) Rotate by 45° about the current x-axis
3) Rotate by -30° about the world/fixed y-axis
Compute the resulting overall rotation matrix R. Notice that you need to provide the numerical
solution to the matrix R.
(d) Find R giving the following rotation matrices.
1
0
0
1
√√3
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0
0
R₁₁ =
2
R₁ = 0
1
0
1
0
0
0
2
2
Chapter 12 Solutions
EBK NETWORK+ GUIDE TO NETWORKS
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