Fault Detection Filter Applied to Structural Health Monitoring: Experimental Results
نویسندگان
چکیده
A model based fault detection filter is developed for structural health monitoring of a simply supported beam. The structural damage represented in the plant model is decomposed and is shown to reduce to a fault direction vector maintaining a fixed direction. According to detection filter theory, this fault detection vector under certain circumstances can be uniquely detected and identified through an invariance in the direction imposed on the fault detection filter residuals. The design algorithm uses a left eigenstructure assignment approach. The filter is applied to data from an aluminum simply supported beam with 4 piezoelectric sensors and 1 piezoelectric actuator. By exciting the structure at the first natural frequency, a 5mm saw cut made to one side of the beam, is detected and localized. Copyright c ©2005 IFAC
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