KINEMATICAL ASPECTS OF THE TRANSMISSION OF MOTION BY CABLE

Abstract

The kinematical and dynamical analysis of mechanisms containing transmission by cable necessitates knowing the kinematical equations of the transmission. In most cases the cable is moving in the tangent direction at a fix point of the drum it is winding around. A different case of the transmission of motion by cable is kinematically analysed in this paper by classical methods. This approach implies complicated calculus such as the differentiation with respect to time of complicated functions or performing a lot of algebraic manipulations. These aspects emphasises that would be very helpful to find another method in order to obtain the kinematical equations in a simpler manner. The paper presents the kinematical study by using a hypothetical replacement of the cable with a rigid bar performing a plane motion. The plane motion similarity permits the exploitation of all the properties of this motion and this leads to important simplifications of the calculus.