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High-Fidelity Model of the sandwich composite structure with real geometry is reported. The model includes two composite facesheets, honeycomb core, piezoelectric actuator/sensors, adhesive layers, and the impactor. The novel feature of the model is that it includes modeling of the impact and wave propagation in the structure before and after the impact. Results of modeling of the wave propagation,...
Structural damage detection and health monitoring is very important in many applications, and its key related issue is the method of damage detection. Due to its coefficient matrices being not positive, the KKT system of Least Square Support Vector Machine (LS-SVM) can't be solved directly by Conjugate Gradient (CG) method. To enhance the convexity and increase further the computational speed, an...
This work considers incipient fault diagnosis and prognosis for hybrid systems with unknown mode changes. A set of augmented analytical redundancy relations (ARRs), termed AARRs, is proposed to extend the capability of ARRs to identify degradation of components which are not represented by physical parameters. The methods utilize the unified constraint relations, named global AARRs (GAARRs), for health...
The ceramic roller kiln with oxygen-enriched and pure oxygen combustion (CRKOC) is proposed by authors. According to the structural feature and thermal characteristics of CRKOC, a new concept is proposed in this paper, which is the kiln body real-time health monitoring of CRKOC. Three aspects are mainly researched. Firstly, the necessity of the health monitoring on kiln is analyzed. Secondly, the...
A real-time strain monitoring system based on distributed Fiber Bragg Grating sensors is designed for the health monitoring of port machinery. This paper describes the system design and field test on port machinery in Qing Huangdao and the test results are discussed. Through the long-term monitoring on running state especially the structure strain of port machinery, the status of the port machinery...
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