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The object of study in this paper is the Faiveley CX-PG pantograph. We first used the large-eddy simulation (LES) model to simulate the surrounding fluctuating flow field. We then identified the vortex structures in the flow field of the pantograph via the Q criterion, and performed a Fourier transform on the fluctuating pressure. We finally used the Ffowcs Williams-Hawkings (FW-H) equation to predict...
Piezoelectric stack with its large output force and small displacement, which cannot satisfy the requirement of the opening of the cone valve core of the actual situation. A piezoelectric hydraulic principle of the hydraulic actuators based on displacement amplification was put forward, the output displacement and piezoelectric stack driving volt length, area and enlarge the structure dimension parameters...
Technology and process cost is the monetization measure of all the relevant cost of the products or components manufacturing process from the perspective of technology and process. By the procedure-based technology and process cost assessment, the cost of each working procedure can be known in advance, and the various cost factors of each procedure can be controlled in the production process. Some...
The framework of the Web-based typical mechanical manufacture process management system is studied in details with using for reference of the research production of contemporary technology and process management and designing for technology and process management information and getting down to practicality demand for typical process of manufacturing enterprises. And the expression of the ontology-based...
The optimization modeles of production decision are established based on the production management levels. The production decision modeles are divided as distributed production decision, integrated production decision, product master production decision and shop floor decision. Top-down and level by level, each optimization model of production decision is constructed with the linear programming method...
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