INDUSTRIAL MOTOR CONTROL
7th Edition
ISBN: 9780357670590
Author: Herman
Publisher: CENGAGE L
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Textbook Question
Chapter 61, Problem 3RQ
Briefly explain the operation of the UJT.
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Problem 1 (30 Points)
Consider the following 2 scenarios. In scenario 1, a mass m slides on a cylindrical surface of radius R. In
scenario 2, a mass m hangs at the end of a thin massless rod of length R. In both scenarios, there is no
friction either on the surface (scenario 1), or at the pivot point of the pendulum (scenario 2). Also in
both scenarios, there is one generalized coordinate, .
R
Scenario 1
R
m
R
g
Scenario 2
m
HINT: In both scenarios, it is much easier to choose your datum for potential energy as the center of the
bowl (scenario 1), or the pivot point of the pendulum (scenario 2).
Part I
a) Determine the Lagrangian for each system. DO NOT FIND THE EQUATIONS OF MOTION (5 points)
b) What can you say about the systems based on the Lagrangian? (2 points)
c) Solve for the equations of motion for both systems. (8 points)
Part II
Now, for scenario 1, introduce an additional coordinate and treat it as a nonholonomic system to
determine the normal force acting on the mass.
a)…
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- What is the procedure to replace the input bellows?(I found this question on the internet and was wondering what the correct answer is out of interest) Remove tubing, old bellows and flapper assembly, install new bellows, connect tubing, install flapper assembly, then calibrate the positioner.Remove tubing, old bellows and cam, install new bellows, connect tubing, install cam, then calibrate the positioner.C. Remove tubing and old bellows, align the quadrant beam, install new bellows and connect tubing, then calibrate the positioner.D. Remove tubing and old bellows, install new bellows and connect tubing, align the quadrant beam, then calibrate the positioner.arrow_forwardGiven the following information: (I found this question on the internet and was wondering what the correct answer is) Firing rate demand = 20% Fuel air ratio = 2:1 Fuel flow = 20% Minimum air flow setting = 5% What is the set point for the air flow controller? 5%B. 10%C. 25%D. 40%arrow_forward. Where is a dew point analyzer installed to measure instrument air?(I found this question on the internet and am wondering what the correct answer is) A. AB. BC. CD. Darrow_forward
- The piston at the bottom of the stroke is 0% open. Which adjustment will change the zero setting to 5% open? ( I found this sample question on the internet and was wondering what the correct answer is out of interest) A.Slide component 2 towards the pivotB. Slide component 2 away from the pivot.C. Increase spring tension using adjustment 1.D. Decrease spring tension using adjustment 1.arrow_forward(read image) (Answer: vA = 4.57 ft/sec)arrow_forward(read image) (answer: αAB = 14.38 rad/s2 CW)arrow_forward
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