Design and analysis of an adjustable Stephenson-III closed-chain leg mechanism and its application in multi-legged robot

Abstract

To improve the insufficient adaptability of single degree-of-freedom (DOF) closed-chain legs to unknown surroundings, this paper studies a novel adjustable closed-chain leg mechanism. Based on the traditional six-bar Stephenson-III leg mechanism, we add one degree-of-freedom to realize the adjustment of frame rod position, by which different shapes of foot trajectory curves are obtained. The height of the foot trajectory can be adjusted longitudinally to enhance the obstacle-surmounting ability, and the length of the walking stride can be changed in the transverse direction to achieve the landing point placement of the swing leg. The structure optimization, gait analysis and obstacle-surmounting simulation in different scenarios are carried out. The test results of walking ability and obstacle surmounting performance in specific surrounding show that the designed closed-chain leg mechanism can increase the maximum obstacle-crossing height and walking stability, which proves the promising characteristics of the proposed leg mechanism in the application of multi-legged robots.

Keywords

Adjustable Stephenson-III mechanism closed-chain leg trajectory optimization foot gait analysis obstacle surmounting simulation

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References

Liu

Zhao

Tan

Legged robots: a review. Robot 2006; 28(4): 81–88.

Manickavelan

Singh

Sellappan

Design, fabrication and analysis of four bar walking machine based on Chebyshev’s parallel motion mechanism. Eur Int J Sci Technol 2014; 3(8): 65–73.

Han

Ren-Wu

Yang

, et al. Solution-region synthesis approach of a watt-i six-bar rigid-body guidance mechanism. Chin J Eng 2015; 37(5): 655–660.

Qaiyum

Mohammad

Optimal synthesis of Stephenson-iii linkage using particle swarm optimization. Int J Mech Prod Eng Res Dev 2020; 10(3): 15989–15998.

Hernández

Gómez

Crespo

, et al. A home made robotic platform based on theo jansen mechanism for teaching robotics. In: The 10th annual international technology, education and development conference, Valencia, Spain, pp.6689–6698. IATED Academy.

Kavlak

Kartal

. Kinematic analysis of mobile robot with Klann walking mechanism. In: The 3rd international congress on human-computer interaction, optimization and robotic applications (HORA), Tokat Gaziosmanpaca University, Ankara, Turkey, pp.1–6. New York, NY: IEEE.

Liang

Ceccarelli

Takeda

Operation analysis of a Chebyshev-pantograph leg mechanism for a single DOF biped robot. Front Mech Eng 2012; 7(4): 357–370.

Liang

Ceccarelli

Takeda

Operation analysis of a one-DOF pantograph leg mechanisms. Proc RAAD 2008; 8: 1–10.

Nansai

Rojas

Elara

, et al. On a Jansen leg with multiple gait patterns for reconfigurable walking platforms. Adv Mech Eng 2015; 7(3): 1–18.

10.

Sheba

Martínez-García

Elara

, et al. Design and evaluation of reconfigurable Klann mechanism based four legged walking robot. In: The 10th International conference on information, communications and signal processing, Singapore, pp.1–5. New York, NY: IEEE.

11.

Wang

Dong

Jin

, et al. System dynamics simulation and prototype design of a high efficient legged robot based on hybrid-driven mechanism. In: The IEEE/ASME international conference on advanced intelligent mechatronics, Wollongong, NSW, Australia, pp.536–541. New York, NY: IEEE.

12.

Design and application research on link-based multi-legged carrying platform with whole closed-chain mechanism. Master’s Thesis, Beijing Jiaotong University, Beijing, 2019.

13.

Wang

Yao

Design and analysis of a novel adjustable closed-chain multi-legged robot. Mech Eng J 2020; 56(19): 191–199.

14.

Peón-Escalante

Jiménez

Escalante Soberanis

, et al. Path generation with dwells in the optimum dimensional synthesis of Stephenson III six-bar mechanisms. Mech Mach Theory 2020; 144: 103650.

15.

Park

Kim

Design of a cat-inspired robotic leg for fast running. Adv Robot 2014; 28(23): 1587–1598.

16.

Yan

Huang

. On the design of a self-balanced quadruped walking machine with ten-bar leg mechanisms. In: International design engineering technical conferences and computers and information in engineering conference, Design Engineering Division and Computers in Engineering Division, San Diego, CA, pp.663–673. ASME.

17.

Rong

, et al. Mechanical design and gait planning of a hydraulically actuated quadruped bionic robot. J Shandong Univ (Eng Sci) 2011; 41(5): 32–36.

18.

Hung

CC.

On the mechanism design of a hybrid 8-link type walking horse. Master’s Thesis, National Cheng Kung University, Taiwan, 2002.

19.

Yao

YA.

Design and analysis of a novel walking vehicle based on leg mechanism with variable topologies. Mech Mach Theory 2018; 128: 663–681.

20.

Zhang

Teng

Wang

, et al. Design of bionic goat quadruped robot mechanism and walking gait planning. Int J Agric Biol Eng 2020; 13(5): 32–39.

21.

Yang

Rong

Zhou

, et al. Modeling and analysis on energy consumption of hydraulic quadruped robot for optimal trot motion control. Appl Sci 2019; 9(9): 1771.

22.

Yao

, et al. Design and analysis of a sixteen-legged vehicle with reconfigurable close-chain leg mechanisms. J Mech Robot 2019; 11(5): 1771.