{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T18:55:23Z","timestamp":1792004123785,"version":"4.4.0"},"reference-count":43,"publisher":"AIP Publishing","issue":"7","funder":[{"DOI":"10.13039\/501100004541","name":"Ministry of Education, India","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100004541","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004281","name":"Narodowe Centrum Nauki","doi-asserted-by":"publisher","award":["2023\/51\/I\/ST8\/02739"],"award-info":[{"award-number":["2023\/51\/I\/ST8\/02739"]}],"id":[{"id":"10.13039\/501100004281","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2026,7,1]]},"abstract":"<jats:p>The narrow operational bandwidth inherent to linear systems severely limits their efficacy in real applications, especially with low-amplitude broadband excitations. This paper explores an impact-driven magneto-mechanical system, designed to improve broadband performance. The system is two coupled pendulums with tip magnets and intentional asymmetry. The asymmetry is introduced via a unilateral rigid wall constraint, which induces piecewise physical impacts. The system is modeled using an extended Lagrange formulation and analyzed through a semi-analytical Harmonic Balance (HB) framework. Unlike conventional studies that rely primarily on numerical integration, this work explicitly quantifies the amplitude transfer to sub-harmonic and super-harmonic components during impacts, mapping the system\u2019s bifurcations and the emergence of strange attractors within chaotic regimes. This approach uniquely enables the mathematical reconstruction and decomposition of complex multi-fold phase synchronization loops, demonstrating that individual harmonic components maintain linear phase synchronization even as their synchronization gradients decrease at higher harmonic orders. Leveraging these nonlinear mechanisms, a multi-objective Genetic Algorithm (GA) is used to optimize geometric and stiffness parameters, expanding the half-power bandwidth by 218.8% without sacrificing the peak power output. Beyond energy harvesting, the proposed semi-analytical HB reconstruction and phase synchronization frameworks provide broadly applicable methodologies for characterizing strongly nonlinear coupled oscillators and advancing vibration-based structural health monitoring systems.<\/jats:p>","DOI":"10.1063\/5.0331975","type":"journal-article","created":{"date-parts":[[2026,7,23]],"date-time":"2026-07-23T12:55:41Z","timestamp":1784811341000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":1,"title":["Performance enhancement of a coupled magneto-mechanical harvester through impact"],"prefix":"10.1063","volume":"36","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-0554-1575","authenticated-orcid":false,"given":"Sudipta","family":"Maity","sequence":"first","affiliation":[{"name":"Department of Applied Mechanics and Biomedical Engineering, Indian Institute of Technology Madras 1 , Chennai 600036, Tamil Nadu,","place":["India"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4651-9548","authenticated-orcid":false,"given":"Shaikh Faruque","family":"Ali","sequence":"additional","affiliation":[{"name":"Department of Applied Mechanics and Biomedical Engineering, Indian Institute of Technology Madras 1 , Chennai 600036, Tamil Nadu,","place":["India"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9647-8345","authenticated-orcid":false,"given":"Grzegorz","family":"Litak","sequence":"additional","affiliation":[{"name":"Department of Automation, Lublin University of Technology 2 , Nadbystrzycka 36, Lublin 20-618,","place":["Poland"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"317","published-online":{"date-parts":[[2026,7,23]]},"reference":[{"key":"2026072308553734700_c1","doi-asserted-by":"publisher","first-page":"100007","DOI":"10.1016\/j.geits.2022.100007","article-title":"A review on foreign object detection for magnetic coupling-based electric vehicle wireless charging","volume":"1","year":"2022","journal-title":"Green Energy Intell. 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