Null Space Motion Control by PID Control Considering Passivity in Redundant Manipulator. - Tsuyoshi Shibata; Toshiyuki Murakami (IEEE Trans. Ind. Informatics, 2008)

Power-Assist Control of Pushing Task by Repulsive Compliance Control in Electric Wheelchair. - Tsuyoshi Shibata; Toshiyuki Murakami (IEEE Trans. Ind. Electron., 2012)