Multi-terrain Quadrupedal-wheeled Robot Mechanism: Design, Modeling, and Analysis


  •   Eric Gratton

  •   Mbadiwe Benyeogor

  •   Kosisochukwu Nnoli

  •   Oladayo Olakanmi

  •   Liam Wolf

  •   Zavier Berti

  •   Sushant Kumar

  •   Piyal Saha


For a robot to navigate in terrains of rough and uneven topographies, its drives and controllers must generate and control large mechanical power with great precision. This paper is aimed at developing an autonomous robot with active-suspensions in form of a hybrid quadrupedal-wheel drive mechanism. This involves a computational approach to optimizing the development cost without compromising the system’s performance. Using the Solidworks CAD tool, auxiliary components were designed and integrated with the bed structure to form an actively suspended robot drive mechanism. Also, using the S-Math Computing tool, the robot’s suspension system was optimized, employing a four-bar mechanism. To enhance the compatibility of this design with the intended controller, some mathematical equations and numerical validations were formulated and solved. These included the modeling of tip-over stability and skid steering, the trendline equations for computing the angular positions of the suspension servomotors, and the computation of R2– values for determining the accuracy of these trendline equations. Using finite element analysis (FEA), we simulated the structural integrity of key sub-components of the final structure. The results show that our mechanical design is appropriate for developing an actively suspended robot that can efficiently navigate in different terrestrial sites and topographies.

Keywords: Active suspension, Four-bar mechanism, Servo- motor, Skid steering, Tip-over stability, Quadrupedal-wheel robot


Y. Sun, Y. Yang, S. Ma, and H. Pu, “Design of a high- mobility multi-terrain robot based on eccentric paddle mechanism,” Robotics and Biomimetics, vol. 3(8), pp. 1–11, 2016.

K. Iagnemma, A. Rzepniewski, and S. e. a. Dubowsky, “Control of robotic vehicles with actively articulated sus- pensions in rough terrain,” Autonomous Robots, vol. 14, pp. 5–16, 2003.

K. Kozlowski and D. Pazderski, “Modeling and control of a 4-wheel skid-steering mobile robot,” Intl. Journal of Applied Mathematics and Computational Science, vol. 14(4), pp. 477–496, 2004.

A. Gonzalez, E. Ottaviano, and M. Ceccarelli, “On the kinematic functionality of a four-bar based mechanism for guiding wheels in climbing steps and obstacles,” Mechanism and Machine Theory, vol. 44(8), pp. 1507– 1523, 2009.

E. Ottaviano and P. Rea, “Design and operation of a 2- dof leg–wheel hybrid robot,” Robotica, vol. 31(8), pp. 1319–1325, 2013.

S. Hirose and H. Takeuchi, “Study on roller-walk (basic characteristics and its control),” Proceedings of IEEE International Conference on Robotics and Automation, Minneapolis, MN, USA, vol. 4, pp. 3265–3270, 1996.

O. Olakanmi and M. Benyeogor, “Internet based tele- autonomous vehicle system with beyond line-of-sight capability for remote sensing and monitoring,” Internet of Things, vol. 5, pp. 97–115, 2019.

O. Mokhiamar and S. Amine, “Lateral motion control of skid steering vehicles using full drive-by-wire system,” Alexandria Engineering Journal, vol. 56, pp. 383–394, 2017.

H. Jiang, G. Xu, W. Zeng, F. Gao, and K. Chong, “Lateral stability of a mobile robot utilizing an active adjustable suspension,” MDPI Applied Sciences, vol. 9(20), p. 4410, 2019.

E. Papadopoulos and D. Rey, “A new measure of tip-over stability for mobile manipulator,” Proceedings of IEEE International Conference on Robotics and Automation, vol. 4, pp. 3111–3116, 1996.

E. Mart´ınez-Garc´ıa and R. Torres-Co´rdoba, “4wd skid- steer trajectory control of a rover with spring-based suspension analysis,” International Conference on Intelligent Robotics and Applications - Third International Conference, ICIRA, vol. 6424, p. 036103, 2010.

J. Tian, J. Tong, and S. Luo, “Differential steering control of four-wheel independent-drive electric vehicles,” MDPI Energies, vol. 11(11), pp. 1–18, 2018.


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How to Cite
Gratton, E., Benyeogor, M., Nnoli, K., Olakanmi, O., Wolf, L., Berti, Z., Kumar, S. and Saha, P. 2020. Multi-terrain Quadrupedal-wheeled Robot Mechanism: Design, Modeling, and Analysis. European Journal of Engineering and Technology Research. 5, 12 (Dec. 2020), 24-33. DOI: