The influence of dry friction and mechanical parameters on the stability and accuracy of an hydraulic copying system

Abstract

In order to improve the accuracy of an hydraulic copying system, the hydraulic stiffness must be increased and dry friction decreased. Both hydraulic stiffness and dry friction have important influences on the stability of the system, and so have several mechanical parameters. As a pure mathematical study of the influence of the non-linear dry friction is rather difficult, the behaviour of the system will be simulated on an analogue computer. This simulation will provide useful data about the stability criterion and the optimalization of the system.