Basedon the present situation of the domestic comprehensive tunneling temporary supporting technology, machine support and temporary support device is researched. This paper is on the basis of the previous design simple optimization.The design enhances temporary support level and improves its ability to support for a long time, in some extent, increases the strength of roof support. The optimization is described in detail.By adding a hydraulic cylinder,it can make each lever own supporting ability and ensure support stability. Organizationstructure and three dimensional graphics are drawn in the paper.The force analysis is carried. Finally appropriate position is determined.
To improve the training effect of marine engine room simulator in the aspect of training marine engineer and save the cost of training in real ships, this paper extends the framework of traditional marine engine room simulator by taking full advantage of visual simulation technology and the configuration of framework is presented. The framework is divided into three parts by functionality which is three-dimensional engine room visual simulation side, server side and two-dimensional marine engine room simulator side and the function of each part is also described in details. To implement the function of interaction and collaborative operation of marine engine room simulator under this framework, communication protocol between three-dimensional side and two-dimensional is established and processing mode of interactive entity is designed. This marine engine visual simulation training system has been applied to actual training, achieved better training effect and save the cost of training in real ships of marine education effectively.
A novel orthogonal 5-DOF parallel manipulator was proposed, and the statics equations of the 5-DOF parallel manipulator were derived in closed forms based on its layout feature, then the statics transmission indices wer defined, and discussed in detail. It can provide theoretical base for the applications of the 5-DOF parallel machine tool. The novel 5-DOF parallel manipulator can be used as the precision platform in which the requirements for high stiffness, high accuracy and good technological efficiency.
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