Analysis of the non-reciprocating legged gait for a hexapod robot based on the ePaddle-EGM

Abstract A novel eccentric paddle mechanism based on the epicyclic gear mechanism (ePaddle-EGM) has been proposed to enhance the mobility of amphibious robot for multi-terrain tasks with diverse locomotion gaits. This paper presents a brief description for this mechanism. Based on the feature of ePaddle-EGM, a unique non-reciprocating legged gait planning method is proposed. This method could minimize the negative effect of backlash between gear mesh in the epicyclic gear mechanism. Furthermore, the stable tripod gait for the ePaddle-EGM-based hexapod robot is designed. One of the most important characteristics of this tripod gait is that it is capable of realizing discontinuous locomotion of the body through continuous and unidirectional rotation of joints. In this way, the velocity shock is eliminated and the locomotion accuracy is guaranteed. A series of simulations were conducted to validate the advantages of the robot’s movement.

[1]  Auke Jan Ijspeert,et al.  Salamandra Robotica II: An Amphibious Robot to Study Salamander-Like Swimming and Walking Gaits , 2013, IEEE Transactions on Robotics.

[2]  R. McGhee,et al.  On the stability properties of quadruped creeping gaits , 1968 .

[3]  Roger D. Quinn,et al.  Design of a semi-autonomous hybrid mobility surf-zone robot , 2009, 2009 IEEE/ASME International Conference on Advanced Intelligent Mechatronics.

[4]  Martin Buehler,et al.  Simulation of an underwater hexapod robot , 2009 .

[5]  M. Frejek,et al.  Design of a small-scale autonomous amphibious vehicle , 2008, 2008 Canadian Conference on Electrical and Computer Engineering.

[6]  Zhenbang Gong,et al.  Non-reciprocating legged gait for robot with epicyclic-gear-based eccentric paddle mechanism , 2015, Robotics Auton. Syst..

[7]  Tao Wang,et al.  Design and locomotion simulation of an improved eccentric paddle mechanism for amphibious robots , 2013, 2013 IEEE International Conference on Robotics and Biomimetics (ROBIO).

[8]  Prabir K. Pal,et al.  Generation of free gait-a graph search approach , 1991, IEEE Trans. Robotics Autom..

[9]  Mingcong Deng,et al.  Two-wheeled mobile robot motion control in dynamic environments , 2010 .

[10]  Zhenbang Gong,et al.  Improved effective design of the eccentric paddle mechanism for amphibious robots , 2014, 2014 IEEE International Conference on Robotics and Biomimetics (ROBIO 2014).

[11]  Jason Jianjun Gu,et al.  Efficiency analysis of epicyclic gear mechanism of the improved ePaddle mechanism via virtual power , 2013, 2013 IEEE International Conference on Robotics and Biomimetics (ROBIO).

[12]  John J. Grefenstette,et al.  ARIEL: Autonomous Robot for Integrated Exploration and Localization , 1997, AAAI/IAAI.

[13]  Zhenbang Gong,et al.  Stability Analysis and gait Planning of a quadruped robot Based on the eccentric paddle Mechanism , 2014, Control. Intell. Syst..

[14]  R. McN. Alexander,et al.  The Gaits of Bipedal and Quadrupedal Animals , 1984 .

[15]  Zhenbang Gong,et al.  Experimental study on oscillating paddling gait of an eccentric paddle mechanism , 2012, 2012 IEEE International Conference on Robotics and Biomimetics (ROBIO).

[16]  Konstantinos Karakasiliotis Legged locomotion with spinal undulations , 2013 .

[17]  David E. Orin,et al.  Omnidirectional supervisory control of a multilegged vehicle using periodic gaits , 1988, IEEE J. Robotics Autom..

[18]  Auke Jan Ijspeert,et al.  Online Optimization of Swimming and Crawling in an Amphibious Snake Robot , 2008, IEEE Transactions on Robotics.