POSITION CONTROL OF A WATER HYDRAULIC CYLINDER

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...

The Position Control of the Hydraulic Cylinder Controlled by the High-Speed On-Off Valve

This paper aims to research the position control of the hydraulic cylinder controlled by the highspeed on-off valve to realize the precise position control. A compound algorithm of proportional integral & speed feedforwarddisplacement feedback is put forward based on the research on the relationship between the duty ratio and the past flow for the high speed on-off valve. The speed feedforwardd...

Self-tuning Position and Force Control of a Hydraulic Manipulator

Tele-operated hydraulic underwater manipulators are commonly used to perform remote underwater intervention tasks such as weld inspection or mating of connectors.Automation of these tasks to use tele-assistance requires a suitable hybrid position/forcecontrol scheme, to specify simultaneously the robot motion and contact forces. Classicallinear control does not allow for the highly ...

The Research on the Position Control of the Hydraulic Cylinder Based on the Compound Algorithm of Fuzzy & Feedforward-feedback

This paper aims to research the position control of the hydraulic cylinder controlled by the high-speed on-off valve to realize the precise position control. The strategy combining the pulse width modulation with pulse frequency modulation is proposed to compensate the dead and saturated zones of the high-speed on-off valve, which is on the groundwork of the analysis of the flow characteristic ...