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Journal of Computational Applied Mechanics
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Azimi, M., Hairi Yazdi, M. (2015). Energy Dissipation Rate Control Via a Semi-Analytical Pattern Generation Approach for Planar Three-Legged Galloping Robot based on the Property of Passive Dynamic Walking. Journal of Computational Applied Mechanics, 46(1), 31-39. doi: 10.22059/jcamech.2015.53391
Mohsen Azimi; Mohammad Reza Hairi Yazdi. "Energy Dissipation Rate Control Via a Semi-Analytical Pattern Generation Approach for Planar Three-Legged Galloping Robot based on the Property of Passive Dynamic Walking". Journal of Computational Applied Mechanics, 46, 1, 2015, 31-39. doi: 10.22059/jcamech.2015.53391
Azimi, M., Hairi Yazdi, M. (2015). 'Energy Dissipation Rate Control Via a Semi-Analytical Pattern Generation Approach for Planar Three-Legged Galloping Robot based on the Property of Passive Dynamic Walking', Journal of Computational Applied Mechanics, 46(1), pp. 31-39. doi: 10.22059/jcamech.2015.53391
Azimi, M., Hairi Yazdi, M. Energy Dissipation Rate Control Via a Semi-Analytical Pattern Generation Approach for Planar Three-Legged Galloping Robot based on the Property of Passive Dynamic Walking. Journal of Computational Applied Mechanics, 2015; 46(1): 31-39. doi: 10.22059/jcamech.2015.53391

Energy Dissipation Rate Control Via a Semi-Analytical Pattern Generation Approach for Planar Three-Legged Galloping Robot based on the Property of Passive Dynamic Walking

Article 4, Volume 46, Issue 1, January 2015, Page 31-39  XML PDF (696.3 K)
Document Type: Research Paper
DOI: 10.22059/jcamech.2015.53391
Authors
Mohsen Azimi email 1; Mohammad Reza Hairi Yazdi2
1M.Sc. Student, School of Mechanical Engineering College of Engineering, University of Tehran, Tehran, Iran
2Associate Professor, School of Mechanical Engineering College of Engineering, University of Tehran, Tehran, Iran
Receive Date: 08 July 2014,  Revise Date: 16 September 2014,  Accept Date: 20 September 2014 
Abstract
In this paper an Energy Dissipation Rate Control (EDRC) method is introduced, which could provide stable walking or running gaits for legged robots. This method is realized by developing a semi-analytical pattern generation approach for a robot during each Single Support Phase (SSP). As yet, several control methods based on passive dynamic walking have been proposed by researchers to provide an efficient human-like biped walking robot. For most of these passive based controllers the main idea is to shape the robot’s energy level during each SSP to restore the mechanical energy which has been lost in the previous Impact Phases (IP); however, the EDRC method provides stable gaits for legged robots just by controlling the robot’s energy level during each IP. In this paper EDRC is applied to a Six-Link Three-Point Foot (6L3PF) model, to realize an active dynamic galloping gait on level ground. As the point-foot contact assumption for the 6L3PF imposes one degree of under-actuation in the ankle joint, it is not clear how to specify the forward kinematic defining the swing leg position and velocity as a function of actuated joint angles. So, a new strategy for solving the dynamic and kinematic equations of the robot is introduced for deriving suitable joint trajectories during each SSP. Simulation results show that the proposed methods in this paper are effective and the robot exhibits a stable dynamic galloping gait on level ground.
Keywords
Inverted Pendulum Model (IPM); passive dynamic walking; point-foot contact assumption; semi-analytical pattern generation
Main Subjects
Control & Robotics
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