The authors present the results of using a simulation in MATLAB of an adaptable hydraulic system with secondary regulation. The hydraulic actuator system has two consumers and uses a Variable-Displacement Motor, actuated by a variable pump. The load is simulated by a winch and the scheme also includes a mass, a damper and the gravity force. The regulation requires a Secondary Control Unit. The latter uses a proportional 4 way servo-cylinder that controls the Variable-Displacement Motor according to the signal received from the electronic regulator. The model is designed as a closed loop control system, with angular velocity feedback loop.
