“…Especially, linear resonant actuators (LRAs) which utilize mechanical resonance can reciprocate at high efficiency and have been used as home electronics, such as an electric shaver and an electric toothbrush. To broaden the application range of LRAs, various kinds of multi-degree of freedom (DOF) resonant actuators have been developed (Suzuki et al, 2010;Yamaguchi et al, 2009). Authors have also proposed a two-DOF resonant actuators that was able to be independently driven in x-and z-axes by vector control (Yoshimoto et al, 2012(Yoshimoto et al, , 2014(Yoshimoto et al, , 2015, and the effectiveness of the actuator was confirmed through three-dimensional (3D) finite element analysis (FEA) and measurement on a prototype.…”