Ground Adaptability of Crawler Mobile Robots with Sub-Crawler Rotary Joint Compliance. - Ayaka Watanabe; Tomonori Mitsuhashi; Masayuki Okugawa; Katsuji Oogane; Tetsuya Kimura; Tetsuya Kinugasa; Yoshikazu Ohtsubo (J. Robotics Mechatronics, 2024)