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Dynamic Simulation of Modifiable Bipedal Walking on Uneven Terrain with Unknown Height
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 Title & Authors
Dynamic Simulation of Modifiable Bipedal Walking on Uneven Terrain with Unknown Height
Hong, Young-Dae; Lee, Ki-Baek;
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 Abstract
To achieve bipedal walking in real human environments, a bipedal robot should be capable of modifiable walking both on uneven terrain with different heights and on flat terrain. In this paper, a novel walking pattern generator based on a 3-D linear inverted pendulum model (LIPM) is proposed to achieve this objective. By adopting a zero moment point (ZMP) variation scheme in real time, it is possible to change the center-of-mass (COM) position and the velocity of the 3-D LIPM throughout the single support phase. Consequently, the proposed method offers the ability to generate a modifiable pattern for walking on uneven terrain without the necessity for any extra footsteps to adjust the COM motion. In addition, a control strategy for bipedal walking on uneven terrain with unknown height is developed. The torques and ground reaction force are measured through force-sensing resisters (FSRs) on each foot and the foot of the robot is modeled as three virtual spring-damper models for the disturbance compensation. The methods for generating the foot and vertical COM of 3-D LIPM trajectories are proposed to achieve modifiable bipedal walking on uneven terrain without any information regarding the height of the terrain. The effectiveness of the proposed method is confirmed through dynamic simulations.
 Keywords
Bipedal robot;Humanoid robot;Modifiable walking pattern;Uneven terrain locomotion;
 Language
English
 Cited by
 References
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