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The energy sector is an essential component in any nationпїЅs economy and well-being. The security and safety of any energy grid system is nowadays a strongpoint in mid and long term strategies when it comes to national development. Safety and security of energy supply is a multicomponent factor that includes: power generation systems, power transport and distribution systems and consumer management. The power generation units in Romania are very complex and they include different sources like coal, gas, nuclear, ...

The paper is devoted to the performance of a new combination between a classical closed center hydraulic feedback steering unit and an electrohydraulic servo system based on the modern generation of digital servo valves. This type of combination may represent a solution for autonomous agricultural machinery based on the high-level technologies. The research is generated by increasing world population requesting more supplies on one hand, and the obvious decreasing of rural inhabitants, augmented by the translation...