Force Synchronizing Control for 4 Axes Driven Hydraulic Cylinder-Clamping Load Systems

Concurrent Control of Velocity-force Control and Energy-saving Control in Hydraulic Valve-controlled Cylinder Systems

High servo control response and high energy-efficiency are requested in hydraulic servo systems of current hydraulic machines. This investigation concurrently implements energy-saving control and velocity-force control for simultaneously realizing high velocity-force control response and high energy-efficiency for hydraulic valve-controlled cylinder systems. The velocity-force control of the hy...

Digital Control Systems for Synchronizing Hydraulic Servo Cylinders

This paper presents the theoretical and experimental researches performed by the authors in order to design a digital control system for electrohydraulic servomotors. The system contains a digital control module and two position servomechanisms. A mathematical approach was developed for obtaining a mathematical model describing the whole control system. The dynamic performance of this system wa...

Model-based force and position tracking control of an asymmetric cylinder with a digital hydraulic valve

Model-based force and position tracking control of a multi- pressure hydraulic cylinder

This paper presents a force control solution for a throttle-free multi-pressure hydraulic cylinder actuator. A model-based force controller was developed and the position and velocity tracking control was implemented using low-order linear controllers. Special attention was paid to robustness against variations in the load mass, bulk modulus and system delay. Experimental results demonstrated e...

Development of Hydraulic Load Simulator for Force Control with High Precision

Nowadays, hydraulic actuators play an important role in a modern industry where controlled force or position with high accuracy is the most significant demand. This paper presents a new kind of hydraulic load simulator (HLS) for conducting performance and stability test in the bench system where force control is important. The system model consists of a hybrid hydro-electric actuator and anothe...