Single-sensor approach for impact localization and force reconstruction by using discriminating vibration modes. (April 2020)

• Record Type: Journal Article
• Authors: Goutaudier, Dimitri; Gendre, Didier; Kehr-Candille, Véronique; Ohayon, Roger
• Is Part Of: Mechanical systems and signal processing. Volume 138(2020)
• Publication Date: 2020-04
• Subjects: Structural Health Monitoring -- Impact identification -- Inverse problem -- Vibration analysis; Structural dynamics -- Periodicals; Vibration -- Periodicals; Constructions -- Dynamique -- Périodiques; Vibration -- Périodiques; Structural dynamics; Vibration; Periodicals; 621
• DOI: 10.1016/j.ymssp.2019.106534
• Languages: English
• ISSNs: 0888-3270

Abstract

Highlights: A modal signature of the impact location is presented. The impact force is reconstructed by fitting a parametric load history model. Various impacts are identified on a plate with help of one accelerometer only. The accelerometer is located on a neutral point of the vibration modes family. Abstract: This study presents a novel strategy for identifying an impact event on a structure from vibration measurements. Compared to triangulation techniques that require at least three sensors on a plate-like structure, only one sensor is used in this work for localizing the impact point. The proposed approach consists in extracting specific modal ponderations as a signature of impact location. The force reconstruction problem is simultaneously addressed by fitting a parametric law. The proposed procedure captures the main load history parameters such as the impact time, its duration and its intensity. An impact test campaign is performed on a metallic plate, equipped with one accelerometer only, to confirm the validity of the proposed single-sensor approach. The methodology is efficient for accurately localizing impacts that are applied anywhere on the plate and for quickly estimating the main load history parameters.