tailieunhanh - Bioinspiration and Robotics Part 6

Tham khảo tài liệu 'bioinspiration and robotics part 6', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Gait Programming for Multi-Legged Robot Climbing on Walls and Ceilings 165 c nJ Ư c 1 o crab type A insert type -------- ------ --------- --- ------- ------ ----- 5 12 1 2 7 12 2 3 3 4 5 6 11 12 Duty factor Figure 15. Comparison of AOD with two robot config urations while the wall robot vertically r A insect type - crab type A I - A Q E - t - s . - - ----------1--------1--------1------1----------1--------1---------1 5 12 1 2 7 12 2 3 3 4 5 6 11 12 Duty factor Figure 16. Comparison of AOD with two robot configurations while climbing horizontally Ceiling gait analysis While the robot is climbing on an inclined wall surface the situation is somewhat different from that on the vertical wall surface. We propose another criterion to evaluate the climbing gait. Anti-overturn Coefficient Definition 2 Anti-overturn Coefficient abbreviated as AOC of a support pattern for a legged robot climbing on an inclined wall surface Cgp js the maximal weight that the robot can carry Wmax divided by suction force of a single sucker F c -Wmax 2 sp Fg Anti-overturn Coefficient of a gait is the minimal of Anti-overturn Coefficient for all support patterns in a gait cycle. CGT Cspi min 21 166 Bioinspiration and Robotics Walking and Climbing Robots For a legged robot climbing on the ceiling as is depicted in toc is calculated by the following theorem. t i K r-Ỹ r Ị 1 . Legged robot climbing on ceilings Theorem 2 For a legged robot climbing on a horizontal Ceiling Anti- overturn Coefficient of a specific support pattern is calculated as Csp aymin r Oi 22 where n is the number of suckers in support status rOi is the i th element of vector R R o AalQ o 23 where A is the same matrix as Eq. 4 whileQ o is the unit load vector normalized to w all 0 0 24 0 n 1 Proof i We begin with the general scenario of the robot adhering on inclined wall surface with angle the following matrix equation still stands A NãF Q 25 Where A .

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