Valve-controlled Systems

Abstract

This chapter deals with the linear method of analysing hydraulic devices which are controlled by using metering valves. Special attention is given to pistons controlled by metering valves of the four-way type but the method is equally applicable to systems employing motors or other types of valve (for three-way valves, see appendix B). The aim of these linear or small perturbation analyses is to derive mathematical models which give reasonably accurate representations of practical system behaviour without being unduly complicated.