Parametrical Investigation of Piezoelectric Energy Harvesting via Friction-Induced Vibration

摘要: In this work, piezoelectric energy harvesting performance via friction-induced vibration is investigated numerically. A one-degree-of-freedom friction system with a element proposed, to study the stick-slip vibration. Subsequently, two-degree-of-freedom two elements investigate model coupling Results show that regardless of systems, it feasible convert electrical when operating in unstable region. Parametrical analysis indicates for system, normal load increases from 5 N 30 N, motion becomes more intense, and will generate electric energy. While increase 20 N 120 N, there critical value generation strongest highest voltage output. When velocity belt 0.5 m/s 2 m/s, amplitudes output become larger. further increasing, generated disappear. For both external resistance has no effect on dynamic behaviour system; however, can modify within limits. It also found force factor 3.1 × 10−5 N/V 3.1 × 10−3 N/V, harvested gradually increase. 3.1 × 10−2 N/V, reduces drastically corresponding voltages reduce significantly, which proves an appropriated give conversion efficiency.