Error Compensation System with Proximity Sensors for Vertical Ladder Climbing of the Robot "WAREC-1". - Xiao Sun 005; Syota Hayashi; Kenji Hashimoto; Takashi Matsuzawa; Yuki Yoshida; Nobuaki Sakai; Akihiro Imai; Masahiro Okawara; Kengo Kumagai; Takanobu Matsubara; Koki Yamaguchi; Atsuo Takanishi (Humanoids, 2018)