Eventos Anais de eventos
DINAME 2017
XVII International Symposium on Dynamic Problems of Mechanics
Mechanical synthesis and analysis of a four bar linkage
Submission Author:
Eline Tiemi Shiino , SP
Co-Authors:
Eline Tiemi Shiino, Leonardo Biagiotti Saint Martin, Katia Lucchesi Cavalca Dedini
Presenter: Eline Tiemi Shiino
doi://10.26678/ABCM.DINAME2017.DIN17-0004
Abstract
Planar mechanisms formed by four bars linked in a kinematic chain are the simplest and most versatile mechanisms, being generally found in several mechanical devices. Moreover, this type of mechanism has multiple exit movements, from a straight line to a circular shape, or a complex trajectory, allowing their use in the solution of various engineering’s problems. As an example of application, four bar linkages are employed in the automotive suspension, arranged in parallel planes. In this paper, a computational algorithm in MATLAB was developed, utilizing classical methods of mechanical synthesis for four bar linkages, up to three precision points. This algorithm was subsequently utilized to the synthesis of a four bar linkage similar to an automotive suspension. A spring and a damper were positioned crosswise the mechanism. Lately, an analysis of the kinematics and kinetic of the suspension was accomplished. In the kinetic analysis, the mechanism was submitted to a force similarly to a car passing by an abrupt discontinuity on the road. Finally, the mechanical response of the system is analyzed and an optimization of the values of the stiffness of the spring and the damping factor of the shock absorber is carried on, seeking the minimization of the vibration effects.
Keywords
Mechanical synthesis, Four bar linkages, Kinematic and kinetic analysis, Optimization
