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Enhancing energy harvesting capacity using delayed feedback control

This article explores the effects of delayed feedback control laws on vibration-based energy harvesting performance. The novel idea originates from a special form of active vibration control systems, namely delayed feedback vibration absorbers (DFVAs). The premise is that DFVAs may offer superior vibration suppression and improved energy harvesting potential when compared to traditional tuned-mass damper (TMD) setups. The dynamics of delayed feedback based absorbers are analyzed. A control law is formulated that enables favorable energy harvesting capability. Closed loop stability concerns are also addressed. The findings are demonstrated on a case study.