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by: Eric Jackson

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Week 1 Lecture Notes MEEG311010

Eric Jackson
UD
GPA 3.45
Vibration and Control
Huang,Guoquan

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Hey guys these are the notes from our MEEG311 lectures for this first week. Included are examples, class notes, my book notes, and diagrams we got in class. I will be posting comprehensive study ...
COURSE
Vibration and Control
PROF.
Huang,Guoquan
TYPE
Class Notes
PAGES
2
WORDS
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This 2 page Class Notes was uploaded by Eric Jackson on Monday September 7, 2015. The Class Notes belongs to MEEG311010 at University of Delaware taught by Huang,Guoquan in Summer 2015. Since its upload, it has received 37 views. For similar materials see Vibration and Control in Literature at University of Delaware.

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Date Created: 09/07/15
Vibrations and Control Lecture 1 This week Sections 22 and 23 Vibration Scientific any motion that repeats itself after a period of time Engineering relationship between oscillatory motions and the associated forces Vibration Parameters Necessary Ingredients 1 Inertia stores kinetic energy 2 Elasticity stores potential energy 3 Damping 9 realistic addition denoted as 0 Force Relationships F k X d k spring constant d displacement F c X V c damping constant v velocity F m X a This one is pretty obvious Free Vibration When a system is initially disturbed by a displacement velocity or acceleration the system begins to vibrate with constant amplitude and frequency depending on stiffness and mass basically no applied external force This frequency is called natural frequency and the form of vibration is called mode shapes Forced Vibration If an external force is applied to a system the system will follow the force with the same frequency When this force frequency is increased to the natural frequency the amplitudes dangerously increase in this region 9 this is known as the resonance phenomenon ex Tacoma Narrows Bridge Degrees of Freedom DOF Mathematical modeling of a physical system requires the selection of a set of variables that describes the behaviors of the system Number of degrees of freedom is the number of kinematically independent Feedback Key concept in control systems 0 Compare the difference between the actual and desired result 0 Take corrective action based on the difference This happens a lot in nature think biological feedback systems

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