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Facing the energy crisis and environmental problems, saving energy of construction machinery, especially in the hydraulic excavator is very important. Regeneration of the potential energy is an effective solution to save energy. However, the conventional hybrid excavator can't regenerate the potential energy. This paper proposes a new structure of hydraulic excavator as well as a control strategy...
Autonomous navigation is a basic feature for unmanned vehicle systems. For successful autonomous navigation, safety and mobility should be considered for path planning. For safety, a path should be planned to avoid threat, and for mobility, it should be planned by considering landscape and robot dynamics. This path can be obtained by applying the threat and mobility information to calculate the cost...
This paper addresses the design of functional safety model for process automation in accord with IEC 61508/61511 standard. Functional safety design of a tail gas treating unit has been conducted in this study. The quantitative fault tree analysis approach which has been proved to be acceptable and widely applied in many applications of modeling and methods supporting the designer and safety engineer...
As nuclear facilities are introducing digital equipment, the cyber security issue becomes emerging topic to be resolved. It is difficult for a nuclear power plant utility to resolve this topic and get a technical solution in particular for operating nuclear power plants because a vulnerability test can give adverse effects to the plants. This is the reason why a test-bed should be needed. This paper...
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