Theoretical Research on Two Improved Optimal Sensor Placement Methods

Wei Liu; Wei Cheng Gao; Hui Li

doi:10.4028/www.scientific.net/AMM.351-352.1122

Paper Titles

Crack Survey and Cause Analysis of a Complex in Huatugou of Qaidam Basin
p.1102

Analysis of Effective Pre-Stress and Stiffness of the Continuous Rigid Frame Bridge in Service Based on Inversion Theory
p.1108

Vibration Control of Offshore Platform Based on Outrigger Damping System
p.1112

Nondestructive Testing Method of Vertical Prestressed Finishing Twisted Steel Tension
p.1117

Theoretical Research on Two Improved Optimal Sensor Placement Methods
p.1122

Identification of Fracture Damage of the Space Truss Structure Based on the Combined Application of Wavelet Analysis and Strain Mode Method
p.1130

Analysis on Defects Location during Rebar Pull-Out Test by Acoustic Emission Technique
p.1138

Research of Vertical Prestressed Losses during Construction Process of PC Continuous Box Girder Bridge
p.1142

A New Magneticrheological Damper Nonlinear Bingham Hysteretic Model and ANSYS Implementation
p.1146

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Theoretical Research on Two Improved Optimal Sensor Placement Methods

Abstract:

Optimal sensor placement technique plays a key role in structural health monitoring and structural vibration control. Based on the advantages and disadvantages of effective independence (EI) and modal kinetic energy (MKE) methods, two improved optimal sensor placement methods which are Effective Independence - Average Acceleration Amplitude (EI-AAA) method and Effective Independence - Modal Kinetic Energy (EI-MKE) method are proposed in this paper. Firstly the formulas are deduced from modal expansion of multiple-input-multiple-output (MIMO) displacement frequency response function matrix. Then a computational simulation of steel cross beam structure has been implemented to demonstrate the feasibility of the two improved methods above. The obtained optimal sensor locations using the two improved methods are compared with those gained by EI method and MKE method. Finally six classical comparison criteria are employed to demonstrate the advantage and disadvantage of these four methods. The results showed that some innovations proposed in this paper are effective and reliable. The two improved optimal sensor placement methods (EI-AAA method and EI-MKE method) can not only make the truncated mode shapes as linearly independent as possible but also enable the measured modal kinetic energy to maintain the maximum value.