Mathematical Problems in Engineering / 2013 / Article / Tab 3

Research Article

On-Board Computing for Structural Health Monitoring with Smart Wireless Sensors by Modal Identification Using Hilbert-Huang Transform

Table 3

Modal frequencies obtained from on-board and offline computing in numerical example.

ModeFrequency of on-board resultFrequency of offline result Error

First order1.91 Hz1.98 Hz3.60%
Second order3.82 Hz3.76 Hz1.50%