Bioinspired omnidirectional piezoelectric energy harvester with autonomous direction regulation by hovering vibrational stabilization

•A bioinspired omnidirectional harvester is realized by vibrational stabilization.•The harvester possesses superiority in all-around uniform directional sensitivity.•The harvester has outstanding advantages in performance and compactness.•Autonomous direction regulation and stabilization enhance 49 times output power.•This omnidirectional design can be extended to harvesters with other mechanisms.