A Study of Active Rotor-Blade Vibration Control using Electro-Magnetic Actuation - Part I: Theory

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A Study of Active Rotor-Blade Vibration Control using Electro-Magnetic Actuation - Part I: Theory

Authors
Publisher
American Society of Mechanical Engineers
Keywords
  • I
  • E
  • Moreover
  • However
  • In This Framework
  • Over The Years
  • This Is The First Paper In A Two-Part Study On Active Rotor-Blade Vibration Control
  • Blade Faults Are A Major Problem In Bladed Machines
  • Such As Turbines And Compressors
  • Increasing Demands For Higher Efficiency
  • Lower Weight And Higher Speed Imply That Blades Become Even More Susceptible To Vibrational Problems
  • Passive Damping Methods
  • Such As Frictional Damping
  • Are Typically Used For This Kind Of Machines
  • Working Very Well At The Specific Design Conditions
  • When The Running Conditions Exceed The Design Specification
  • Then Passive Damping Devices Become Inefficient
  • Active Control Then Might Become A Feasible Technique To Suppress Vibrations
  • To Improve Performance And To Prolong Machinery Lifetime
  • Extensive Research Has Been Undertaken On The Subject Active Control Of Rotor-Blade Vibrations
  • Most Of The Work Concerns Blade Vibration Control Using Actuators Fixed Directly In The Blades
  • Due To The Impracticability And Problems By Fixing Actuators In The Rotating Blades
  • It Is For Practical Application Of Great Interest To Study Whether The Vibrations Can Be Controlled
  • Electro-Magnetic Bearings
  • The Present Paper Gives A Theoretical Contribution Into The Controllability And Observability Analys
  • The Analysis Is Based On Time-Variant Modal Analysis
  • Due To The Time-Periodic Dynamical Characteristics Of This Kind Of System
  • It Gives A Contribution Into The Design Of Active Time-Periodic Modal Controllers
  • Capable To Cope With The System Time-Periodicity
  • Special Emphasis Is Given To The Study Of Rotor And Blade Vibration Control Using Only Shaft-Based A
  • A Periodic Time-Variant Mathematical Model For The Rotor-Blade System Is Derived
  • The Model Is Transformed Into A Modal Form By Calculation Of Time-Varying Modal Matrices Using Hill¿
  • The Modal Model Is Used To Analyse The Controllability And Observability By Two Methods
  • (I) A Visual Observation Of The Time-Varying Mode Shapes
  • (Ii) Calculation Of Quantitative Measures Of Modal Controllability And Observability
  • The Results Obtained Show That The All Vibration Modes Can Only Be Controlled Using Shaft-Based Actu
  • While Actuators Have To Be Placed Acting Onto Both The Blades And Onto The Shaft If The System Has I
  • Time-Periodic Modal State Feedback Controllers Are Designed Based On The Modal Model And Numerical S

Abstract

A Study of Active Rotor-Blade Vibration Control using Electro-Magnetic Actuation - Part I: Theory - DTU Orbit (27/04/14) A Study of Active Rotor-Blade Vibration Control using Electro-Magnetic Actuation - Part I: Theory - DTU Orbit (27/04/14) A Study of Active Rotor-Blade Vibration Control using Electro-Magnetic Actuation - Part I: Theory. / Christensen, Rene Hardam; Santos, Ilmar. Procedings of 2004 ASME Turbo Expo. American Society of Mechanical Engineers, 2004. p. 1-10. Publication: Research - peer-review › Article in proceedings – Annual report year: 2004

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