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 Design of Articulated and Spring-Assist Leg-Wheel System

Our long-term goal is one of designing land-based vehicles to provide enhanced uneventerrain locomotion capabilities. In this research, we examine and evaluate candidate articulated legwheel subsystem designs for use in such vehicle systems.

The leg-wheel subsystem designs under consideration consist of disk wheels attached to the chassis through an articulated linkage containing multiple lower-pair joints. Our emphasis is on creating a design that permits the greatest motion flexibility between the chassis and wheel while maintaining the smallest degree-of-freedom (d.o.f.) within the articulated chain. We focus our attention on achieving two goals: (i) obtaining adequate ground clearance by designing the desired/feasible motions of the wheel axle, relative to the chassis, using methods from kinematic synthesis; and (ii) reducing overall actuation requirements by a judicious mix of structural equilibration design and spring assist.

 

This process is examined in detail in the context of two candidate single-degree-of-freedom designs for the articulated-leg-wheel subsystems ĘC a coupled-serial-chain configuration and a four-bar-configuration. We considered the design synthesis of planar variants of the two candidate designs surmounting a representative obstacle profile while supporting a set of end-effector loads and highlight the key benefits in the presented results.

 

 Students Involved:

- Glenn D. White, M.S., University at Buffalo [Graduated]

- Seung kook Jun, M.S., University at Buffalo [Graduated]

 

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 Related Publications :
[02] Jun, S-K., White, G.D. and Krovi, V., "Kinetostatic Design Considerations for an Articulated Leg-Wheel Locomotion Subsystem", ASME Journal of Dynamic Systems Measurement and Control, July 2005. [PDF]
[01] Jun, S. K., and Krovi, V., "Design Considerations for an Articulated Leg-Wheel Locomotion Subsystem", Proceedings of the 2004 ASME International Mechanical Engineering Congress and Exposition, Anaheim, California, November 13 - 19, 2004. [PDF]
     

 

 Related Publications - Theses:
[02] Jun, S. K., Kinetostatic Design of an Articulated Leg-Wheel Subsystem, M.S. Thesis, Dept. of Mechanical & Aerospace Engineering, SUNY at Buffalo, Jun. 2004. [PDF] [PPS]
[01] Jadhav, C. G., A Low-Cost Framework for Individualized Interactive Telerehabilitation, M.S. Thesis, Dept. of Mechanical & Aerospace Engineering, SUNY at Buffalo, Sep. 2004. [PDF] [PPT]

 

 

 Related Documents :
[01]

Glenn White, "Simulation of Vehicles Over Rough Terrain - presentation".

[PPS]

 

by Automation, Robotics & Mechatronics Laboratory, Mechanical and Aerospace Engineering, University at Buffalo
Last Updated: October 27, 2008.