A NEW GRAPHICAL METHOD FOR SPECIFYING THE DIRECTIONS OF LINEAR ACCELERATION COMPONENTS OF LINKAGE MECHANISMS

Muhsin M. Hamdoon Aljubori and Mohamed Khalifa. Al-Taleb

Department of Mechanical and Industrial Engineering, Faculty of Engineering

University of Alfateh

The two known methods of solution of velocity are the analytical and graphical methods,

and the last one is consists of the relative velocity method and the instantaneous center

method.. The construction of velocity diagram is relatively simple using the relative

velocity method, while the construction of acceleration diagram needs more efforts and

concentration, and could be started by specifying a fixed point or points and drawing the

radial component of acceleration of the link or links which is connected with fixed points

and moves with constant angular velocity and is called the first link. There for this

component will equal the entire acceleration for this link since the tangential component is

equal zero, so the second end of the first link will be specified by one step called the first

step. In this paper we present a new method which can be used to determine the

acceleration components of the linkage mechanisms. The presented method is tested on

different mechanisms. It is concluded that this direct method gave very promising results

and it can be used as an alter approach or for checking the solution resulted from the

application of the known method.