Subspace-based damage identification of roller bearing

Bearing designs - Tapered roller bearing units

Subspace system identification

We give a general overview of the state-of-the-art in subspace system identification methods. We have restricted ourselves to the most important ideas and developments since the methods appeared in the late eighties. First, the basis of linear subspace identification are summarized. Different algorithms one finds in literature (Such as N4SID, MOESP, CVA) are discussed and put into a unifyin...

Subspace-Based Algorithms for Structural Identification, Damage Detection, and Sensor Data Fusion

Detecting and localizing damages for monitoring the integrity of structural and mechanical systems is a topic of growing interest, due to the aging of many engineering constructions and machines and to increased safety norms. Many current approaches still rely on visual inspections or local nondestructive evaluations performed manually, for example acoustic, ultrasonic, radiographic or eddy-cur...

BASIS PURSUIT BASED GENETIC ALGORITHM FOR DAMAGE IDENTIFICATION

In damage detection the number of elements is generally more than the number of measured frequencies. Consequently, the corresponding damage detection equation is undetermined and thus has infinite solutions. Since in the damaged structures most of their elements remain healthy, the sparsest solution for the damage detection equation is mostly the actual damage. In the proposed method, the dama...

Neutron Diffraction Measurements on a Large Size Roller Bearing

In common with many engineering applications the introduction of compressive surface stresses plays an important role in the performance of roller bearings. Since the introduced stress profiles depend on the treatment method and the necessary balancing tensile stresses may have unexpected consequences, it is necessary to quantify the stresses throughout the bearing. Today, most characterization...