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Title
Japanese:ZMPを考慮した4リンクロボット着地手法の検討 
English:Study on Landing Motion Control for 4-link Robots Taking Account of ZMP 
Author
Japanese: 伊庭達哉, 伊吹竜也, 三平満司.  
English: Tatsuya Iba, Tatsuya Ibuki, MITSUJI SAMPEI.  
Language Japanese 
Journal/Book name
Japanese:第14回「運動と振動の制御」シンポジウム予稿集 
English: 
Volume, Number, Page         C213
Published date June 22, 2015 
Publisher
Japanese:日本機械学会 
English: 
Conference name
Japanese:第14回「運動と振動の制御」シンポジウム 
English: 
Conference site
Japanese:栃木県宇都宮市 
English: 
DOI https://doi.org/10.1299/jsmemovic.2015.14.400
Abstract In this paper, we consider a landing motion control problem of 4-link robots which imitate a standing human. We note in this work that when both of the toe and the heel touch the ground, the robot becomes a fully acutuated system. That is, it is possible to decouple the position of the center of the mass(CoM) and the angular momentum about CoM by input transformation. Then, we can consider only three terms about CoM, vertical position, horizontal position, and angular momentum for motion control. First of all, vertical position control of CoM is built based on trajectory design to keep floor reaction force as weak as possible. Secondly, we introduce a Zero Moment Point(ZMP), and control the horizontal position of CoM to keep ZMP within the sole range. Thirdly, the angular momentum is controlled to be gradually converged to zero so that the robot stops after landing motion. Finally, we confirm the effectiveness of the present method by simulations.

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