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In radiation contaminated area sensors have high risk of malfunction, and human cannot work in this area. Therefore, master and slave system without sensors is needed. In this paper, the reaction force estimation for hydraulic system is evaluated. Previously, estimation of reaction force using sliding perturbation observer has been applied to electric motor system. However, hydraulic system has different...
In this paper, the estimation method of reaction force for electro-hydraulic servo system for movement is discussed. This reaction force estimation method is based on sliding perturbation observer that is robust observer technique. Before estimating reaction force, the modeling of electro-hydraulic servo system is processed. Before the fine modeling parameters of electro-hydraulic servo system, modeling...
In the hot rolling process, scratches are caused by immense friction between the rollers and the steel plate, and this defect reduces the quality of steelworks. To solve this problem, a flying touch method was proposed, which can control the gap between rollers for reducing scratches in hot rolling process. In a flying touch method, it is important that the gap between the rolling rolls can be control...
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