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The parameter values for a certain armature-controlled motor are KT = Kb = 0.2 N m/A c =

System Dynamics | 3rd Edition | ISBN: 9780073398068 | Authors: William J Palm III ISBN: 9780073398068 208

Solution for problem 6.41 Chapter 6

System Dynamics | 3rd Edition

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System Dynamics | 3rd Edition | ISBN: 9780073398068 | Authors: William J Palm III

System Dynamics | 3rd Edition

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Problem 6.41

The parameter values for a certain armature-controlled motor are KT = Kb = 0.2 N m/A c = 5 104 N m s/rad Ra = 0.8 La = 4 103 H I = 5 104 kg m2 where c and I include the effect of the load. a. Obtain the step response of ia(t) and (t) if the applied voltage is va = 10 V. b. Obtain the step response of ia(t) and (t) if the load torque is TL = 0.2 N m.

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Philosophy 2010 / Study Guide for Quiz / 23 Mars, 2016 Death Nagel  Deprivation Account of Death: death is bad because it deprives us of future pleasures  Who is death “bad” for ­ Before we die we do not feel death, and after we die we don’t  Time before we existed = not scary ­ Thus, time after we are dead should not be scary.  If immortality (never being deprived of life) is best, we are doomed because we must die. Kagan  If dying is bad because it takes life away…is immortality the best option  Immortality is not a better option. ­ We will accomplish all we want ­ Eventually, we’ll want death ­ Life will become boring, mundane. Existentialism Kierkegaard  Objective truths: verifiable things in external world (backpack, objects, etc.)  Subjective truths: how you relate to the truths you adopt ­ You must believe in a way which impacts your life ­ Passionate belief in wrong thing > bored belief in right thing  Religion cannot be proved objectively true or false.  It’s really the actions (if any) coming from your beliefs which matter, not the objective validity of your belief. Sartre  Existence precedes essence ­ Humans are born, THEN we each determine our individual purposes ­ Objects are made for a specific purpose.  Each of your decisions reflects upon what mankind can do and should be ­ My decisions don’t just reflect upon me  Since (his belief) there is no God, we are free to choose our own purpose instead of relying upon a preordained religious one. The Problem of Evil Mackie  If God is all good and all powerful ­ God should eliminate evil ­ Evil exists ­ Therefore, a good, all­powerful God does not exist. Swinburne (Free Will Defense)  A good God would give us freedom and ability to impact the world  Evil’s existence does not prove that a good, all­powerful God does not exist  Moral evils: Evils done by human beings (lying, cheating, etc.) ­ The result of human free will  Natural evils: evils outside of human free will (natural disasters, etc). ­ Allowed by God so that we can use our free will ­ Allow us to develop qualities like sympathy, charity ­ Allow us to develop cures and defenses ­ Give us opportunity to use our free will in the right way  Physical pain gives us option of complaining or enduring patiently, even.  In order to give us “true” free will, God had to give us tendency towards evil. ­ If we were neutral, we would always choose the good ­ If we were good, we would not have free choice (would always choose good) Belief Clifford  Wrong beliefs are bad to keep ­ Will lead to wrong actions ­ Will be passed on to newer generation  It is always wrong for someone to believe something without sufficient evidence  We have a duty to question our beliefs James  People can have religious beliefs without being morally wrong  Options (choices)  To be genuine, options must… ­ Be live: plausible to person they’re given to ­ Be forced: there is no option C ­ Be momentous: nonreversable, you will miss out if you choose incorrectly AND while you wait and have not decided  You are never going to find absolute proof for religion Difference between James and Clifford Clifford: never believe anything without sufficient evidence James: in some cases, it is appropriate to believe/choose a belief without sufficient evidence because you could miss out if you do not choose.

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Chapter 6, Problem 6.41 is Solved
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Textbook: System Dynamics
Edition: 3
Author: William J Palm III
ISBN: 9780073398068

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The parameter values for a certain armature-controlled motor are KT = Kb = 0.2 N m/A c =