Active Vibration Control (Part - 1) Civil Engineering (CE) Notes | EduRev

Civil Engineering (CE) : Active Vibration Control (Part - 1) Civil Engineering (CE) Notes | EduRev

 Page 1


 Module 1: Overview of Vibration Control
 Lecture 3: Active Vibration Control
 
In this lecture, we will discuss about different strategies for active vibration control.
Different Strategies for vibration control:
 
 
Strategies (ii), (partly) (iv) and (v) are related to Active Vibration Control.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Page 2


 Module 1: Overview of Vibration Control
 Lecture 3: Active Vibration Control
 
In this lecture, we will discuss about different strategies for active vibration control.
Different Strategies for vibration control:
 
 
Strategies (ii), (partly) (iv) and (v) are related to Active Vibration Control.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Module 1: Overview of Vibration Control
 Lecture 3: Active Vibration Cpntrol
 
Applications of Active Vibration Control includes:
a. vibration and shape control of flexible systems like optical mirror
b. gitter control of high precision instruments
c. active suspension system for ride comfort in advanced vehicles
 
Application 1: Vibration & Shape Control of Optical Mirror
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Page 3


 Module 1: Overview of Vibration Control
 Lecture 3: Active Vibration Control
 
In this lecture, we will discuss about different strategies for active vibration control.
Different Strategies for vibration control:
 
 
Strategies (ii), (partly) (iv) and (v) are related to Active Vibration Control.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Module 1: Overview of Vibration Control
 Lecture 3: Active Vibration Cpntrol
 
Applications of Active Vibration Control includes:
a. vibration and shape control of flexible systems like optical mirror
b. gitter control of high precision instruments
c. active suspension system for ride comfort in advanced vehicles
 
Application 1: Vibration & Shape Control of Optical Mirror
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Module 1: Overview of Vibration Control
 Lecture 3: Active Vibration Cpntrol
 
Active Control of Optical Aperture
This type of mirrors are ideally suitable for light weight ultra-large space telescopes. A set of such
flexible mirror segments could be assembled to form the actual mirror. The surface quality is < 30nm.
Stroke requirements for such adjustments is <2µm. Usually PZT actuators are bonded behind
deformable silicon mirror membranes for this purpose. An electric field applied perpendicular to the
piezoelectric layer plane will induce lateral contraction and thereby cause large out of plane deformation
of the membrane.
 
Application 2: LSS: A future Interferometric Mission
Error in the optical path length: nanometre
 
 
 
 
 
 
 
 
 
 
 
 
 
Page 4


 Module 1: Overview of Vibration Control
 Lecture 3: Active Vibration Control
 
In this lecture, we will discuss about different strategies for active vibration control.
Different Strategies for vibration control:
 
 
Strategies (ii), (partly) (iv) and (v) are related to Active Vibration Control.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Module 1: Overview of Vibration Control
 Lecture 3: Active Vibration Cpntrol
 
Applications of Active Vibration Control includes:
a. vibration and shape control of flexible systems like optical mirror
b. gitter control of high precision instruments
c. active suspension system for ride comfort in advanced vehicles
 
Application 1: Vibration & Shape Control of Optical Mirror
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Module 1: Overview of Vibration Control
 Lecture 3: Active Vibration Cpntrol
 
Active Control of Optical Aperture
This type of mirrors are ideally suitable for light weight ultra-large space telescopes. A set of such
flexible mirror segments could be assembled to form the actual mirror. The surface quality is < 30nm.
Stroke requirements for such adjustments is <2µm. Usually PZT actuators are bonded behind
deformable silicon mirror membranes for this purpose. An electric field applied perpendicular to the
piezoelectric layer plane will induce lateral contraction and thereby cause large out of plane deformation
of the membrane.
 
Application 2: LSS: A future Interferometric Mission
Error in the optical path length: nanometre
 
 
 
 
 
 
 
 
 
 
 
 
 
Pointing error of individual telescope: nanoradian
 
Page 5


 Module 1: Overview of Vibration Control
 Lecture 3: Active Vibration Control
 
In this lecture, we will discuss about different strategies for active vibration control.
Different Strategies for vibration control:
 
 
Strategies (ii), (partly) (iv) and (v) are related to Active Vibration Control.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Module 1: Overview of Vibration Control
 Lecture 3: Active Vibration Cpntrol
 
Applications of Active Vibration Control includes:
a. vibration and shape control of flexible systems like optical mirror
b. gitter control of high precision instruments
c. active suspension system for ride comfort in advanced vehicles
 
Application 1: Vibration & Shape Control of Optical Mirror
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Module 1: Overview of Vibration Control
 Lecture 3: Active Vibration Cpntrol
 
Active Control of Optical Aperture
This type of mirrors are ideally suitable for light weight ultra-large space telescopes. A set of such
flexible mirror segments could be assembled to form the actual mirror. The surface quality is < 30nm.
Stroke requirements for such adjustments is <2µm. Usually PZT actuators are bonded behind
deformable silicon mirror membranes for this purpose. An electric field applied perpendicular to the
piezoelectric layer plane will induce lateral contraction and thereby cause large out of plane deformation
of the membrane.
 
Application 2: LSS: A future Interferometric Mission
Error in the optical path length: nanometre
 
 
 
 
 
 
 
 
 
 
 
 
 
Pointing error of individual telescope: nanoradian
 
 Module 1: Overview of Vibration Control
 Lecture 3: Active Vibration Cpntrol
 
Expanded view of the legs of a 6 DOF Isolator
For a 6 DOF active Isolator:
Piezo -actuators offer transmission of low frequency torque and suppression of high frequency
vibration isolation
Alternate to piezo -actuators are Terfenol - D rod, voice-coil etc.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Read More
Offer running on EduRev: Apply code STAYHOME200 to get INR 200 off on our premium plan EduRev Infinity!

Related Searches

practice quizzes

,

video lectures

,

Previous Year Questions with Solutions

,

Semester Notes

,

past year papers

,

study material

,

Sample Paper

,

mock tests for examination

,

pdf

,

Active Vibration Control (Part - 1) Civil Engineering (CE) Notes | EduRev

,

Active Vibration Control (Part - 1) Civil Engineering (CE) Notes | EduRev

,

Viva Questions

,

shortcuts and tricks

,

Objective type Questions

,

MCQs

,

Active Vibration Control (Part - 1) Civil Engineering (CE) Notes | EduRev

,

Summary

,

Exam

,

ppt

,

Free

,

Extra Questions

,

Important questions

;