A self-tuned rotational vibration energy harvester for self-powered wireless sensing in powertrains

• Novel self-tuning rotational vibration energy harvester concept for powertrains. The eliminates the use of protruding beams in harvester. Pendulum on tautochrone path resonance matching a frequency order. generated power drives an electronic circuit with temperature sensor. A physical prototype tested at lab validates proposed design. During conversion between mechanical and electrical within machine, or vice-versa, vibrations (or perturbations speed) are usually present. These can be converted into relatively small but useful amounts that wireless sensors. In this paper, novel applications is presented. design combines self-tuned oscillator eccentric mass “tautochrone” motion so its natural matches selected order speed powertrain to harness oscillations. This original (which does not require beams) enables implementation propulsion appropriate tuning condition. mathematical modelling device selection key parameters suggest sufficient successfully drive equipped manufactured experimentally tested, validating demonstrated capable powering sensor transmitting data every 2 s range more than 1000 rpm shaft speed. Higher transmission rates could achieved by optimising harvester, which currently has overall volume <60 cm 3 .