Articles | Volume 4, issue 1
Mech. Sci., 4, 139–151, 2013

Special issue: Recent advances and current trends in numerical multibody...

Mech. Sci., 4, 139–151, 2013

Research article 26 Feb 2013

Research article | 26 Feb 2013

A new variable stiffness suspension system: passive case

O. M. Anubi, D. R. Patel, and C. D. Crane III O. M. Anubi et al.
  • Center for Intelligent Machines and Robotics, Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida, USA

Abstract. This paper presents the design, analysis, and experimental validation of the passive case of a variable stiffness suspension system. The central concept is based on a recently designed variable stiffness mechanism. It consists of a horizontal control strut and a vertical strut. The main idea is to vary the load transfer ratio by moving the location of the point of attachment of the vertical strut to the car body. This movement is controlled passively using the horizontal strut. The system is analyzed using an L2-gain analysis based on the concept of energy dissipation. The analyses, simulation, and experimental results show that the variable stiffness suspension achieves better performance than the constant stiffness counterpart. The performance criteria used are; ride comfort, characterized by the car body acceleration, suspension deflection, and road holding, characterized by tire deflection.