On-line impact load identification

Article type: Research Article

Authors: Sekuła, Krzysztof | Graczykowski, Cezary | Holnicki-Szulc, Jan

Affiliations: Institute of Fundamental Technological Research, Warsaw, Poland

Note: [] Corresponding author: Krzysztof Sekuła, Institute of Fundamental Technological Research, Warsaw, Poland. E-mail: [email protected]

Abstract: The so-called Adaptive Impact Absorption (AIA) is a research area of safety engineering devoted to problems of shock absorption in various unpredictable scenarios of collisions. It makes use of smart technologies (systems equipped with sensors, controllable dissipaters and specialised tools for signal processing). Examples of engineering applications for AIA systems are protective road barriers, automotive bumpers or adaptive landing gears. One of the most challenging problems for AIA systems is on-line identification of impact loads, which is crucial for introducing the optimum real-time strategy of adaptive impact absorption. This paper presents the concept of an impactometer and develops the methodology able to perform real-time impact load identification. Considered dynamic excitation is generated by a mass M_{1} impacting with initial velocity V_{0}. An analytical formulation of the problem, supported with numerical simulations and experimental verifications is presented. Two identification algorithms based on measured response of the impacted structure are proposed and discussed. Finally, a concept of the AIA device utilizing the idea of impactometer is briefly presented.

Keywords: Impact load identification, Adaptive Impact Absorption, adaptive structures, real-time systems, impact tests

DOI: 10.3233/SAV-2012-0732

Journal: Shock and Vibration, vol. 20, no. 1, pp. 123-141, 2013