Abstract
Water hydraulics is a growing technology area mainly due to environmental, safety and cleanness reasons. Water hydraulic systems have proved to be the best technology alternative in some industrial sectors such as food, processing, paper, steel and power industry. The main challenges for water hydraulics technology are proper design, good reliability and controllability at a reasonable price level. When these requirements are fulfilled, water hydraulic systems should be fully competitive to other systems.The objective of water hydraulics motion control research is to improve the controllability of the systems. This paper considers the current possibilities and challenges in water hydraulics motion control. Component technology is shortly discussed, including control valves and actuators. After the component technology, the present control methods in water hydraulics motion control are explained. The challenges in position, velocity and force control are exemplary described. Finally, two examples of new water hydraulic motion control systems are presented: Example 1. Positioning system with on/off valves, Example2. Cavitation free proportional pressure relief valve for water systems.
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