Modelling and Simulation of Hydraulic Load-sensing Systems Using Object-oriented Programming Environment

Hydraulic systems, in which working pressure (pressure in pump output) is kept proportional to load, are called hydraulic load-sensing systems. Such systems are mainly used in mechanisms containing numerous drives to run with purpose to save energy. These are quite complicated automatically regulating systems and until now optimal solutions for static, steady-state motion and dynamics for such systems have not been found. In this paper we consider a simulation system that enables to describe and search hydraulic load sensing systems and find better solutions to those problems. A high-level programming environment NUT (developed in the Institute of Cybernetics, Tallinn) is used as a tool for building up and managing the simulation system.