Development of a Δ-Type Mobile Robot Driven by Three Standing-Wave-Type Piezoelectric Ultrasonic Motors. - Juntian Zhou; Masaki Suzuki; Ryoma Takahashi; Kengo Tanabe; Yuki Nishiyama; Hajime Sugiuchi; Yusuke Maeda; Ohmi Fuchiwaki (IEEE Robotics Autom. Lett., 2020)

Precise trajectory measurement of self-propelled mechanism by $ text{XY} theta$ three-axis displacement sensor consisting of multiple optical encoders. - Kengo Tanabe; Shiota Masato; Kusui Eiji; Fuchiwaki Ohmi (SICE, 2021)