In this paper, in view of the inherent shortcomings of traditional valve controlled active mass driver system, DDVC electro-hydraulic servo system is tried to be applied to vibration control of civil engineering structures, which will be set on top of the high buildings to prevent from the disaster caused of the strong wind and earthquake.

Cycloconverter technical reform for main drive system of hot strip mill;

A closed-loop hydraulic system of cutter-device was designed using electro-hydraulic control techniques,the rotation control,direction control,braking control,oil fresh and cool system of cutter-devices hydraulic system were also expounded in detail.

ERP-based Quality-driven Product Development;