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The assisted sail is foldable, providing assistance force for the robot in unfolded state and coping with extreme wind speed conditions in folded state. The multimode includes the traction mode with high energy consumption and the sliding mode with low energy consumption, which can be switched through variable\u2010form tracks. To improve the motion ability in sliding mode, the carve slip steering and plow braking for sleds are borrowed from human skiing. Based on kinematic and dynamic models, this article proposes a multimode switching algorithm and sail control methods. On this basis, energy\u2010saving control frameworks and strategies for each mode are proposed, and the effectiveness of energy\u2010saving is verified through simulation. Finally, experiments are conducted to verify the robot's motion ability, sampling ability, and energy\u2010saving effect. The results show that the energy\u2010saving effect of the robot using a multimode energy savings control strategy reaches 21.19%, providing technical support for long\u2010term polar scientific research.<\/jats:p>","DOI":"10.1002\/aisy.202500399","type":"journal-article","created":{"date-parts":[[2025,7,17]],"date-time":"2025-07-17T12:59:49Z","timestamp":1752757189000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Design, Modeling, and Experimentation of Polar Robot: Assisted Sail and Multimode Motion for Energy Saving"],"prefix":"10.1002","volume":"7","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-5155-9263","authenticated-orcid":false,"given":"Yongsheng","family":"Luo","sequence":"first","affiliation":[{"name":"State Key Laboratory of Robotics and System Harbin Institute of Technology  Harbin 150080 P. R. 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