tailieunhanh - Climbing and Walking Robots part 11

Tham khảo tài liệu 'climbing and walking robots part 11', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Locomotion analysis of hexapod robot 293 2. Definitions Several definitions are necessary to be introduced before locomotion planning. 1 Support stance phase a leg is said in its supporting stance phase when it stands on the ground and its foot does not leave the ground. 2 Transfer swing phase a leg is said in its transferring swing phase when it does not stand on the ground but move in the air. 3 Gait period cycle time T a gait period cycle time is a complete cycle of a leg including supporting phase and transferring phase. 4 Duty factor P the duty factor p is the time fraction of stance phase of a leg to the cycle time T. f Tsi Ti where Tsi denotes time of supporting phase of leg i Ti denotes circle time of leg i. 5 Stroke length the distance that the body moves thought the support phase of a leg. 6 Stride length stride length is the distance the centre of gravity COG translates during one complete locomotion cycle. 7 Pitch length the distance between the centers of the strokes of the isoceles legs. 8 Supporting polygon pattern the polygon the vertices of which are constructed on the horizontal plane by vertical projections of the foot-ground interaction points. 9 Statically stability margin SSM stability margin was defined for a given support polygon as the smallest of the distances from the COG. projection to the edges of the support polygon. 10 Longitudinal stability margin LSM the smallest of the distances from the COG. projection to the front and rear edges of the support polygon along the machine s longitudinal axis. 11 Crab Longitudinal Stability Margin CLSM The smallest of the distances from the COG. projection to the front and rear edges of the support polygon along the machine s motion axis. 12 Main walking direction stability margin MDSM the smallest of distance from projection of the . to the front and rear edges of the support polygon along the main-walking direction 13 Kinematics margin kinematics margin is defined as the distance from the .

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