Papers by Author: Wei Jiang

Abstract: The rectifier implements bidirectional power flow, sinusoidal current and unit power factor control in grid side. This paper describes the design and implementation of the current inner-loop and the voltage outer-loop based on space vector pulse width modulation (SVPWM). A control system based on the fuzzy self-tuning PID for three-phase rectifier is proposed in this paper. The new algorithm based on the fuzzy self-tuning PID can improve the performance of the system. Also, the overshoot of the voltage fluctuation is reduced. Simulation and experimentation results show that the validity of the proposed strategy.

Abstract: When design the spline broach,it refer to many parameters, large calculated amount , tedious teeth design and long design cycle .this Papers according to structural parameters of involute spline broach,establishe 3D parameter models with Solidworks. based on the secondary development environment of Solidworks and Visual Basic Language,build explanation mechanism, interface design, run the program realize The geometric constraint Parametric Modeling of involute spline broach. The digital platform of involute spline broach for design take shape initially,short Design cycle improve design precision ,come true broach design automation.

Abstract: In the traditional designs of milling cutter, we cannot get the required accuracy of machining as there may be local deformation on the edges, even more the cutter can break down. Aiming at this situation, a finite-element model of straight pin milling cutter with helical tooth are built using Marc, a nonlinear finite-element analysis software, the different cutting forces of the milling cutter during the cutting process are analyzed and the cutting forces of the milling cutter at different parameters are studied. We get the stress, the strain and the temperature distribution of the milling cutter in different situation. Our work offer a theoretical basis of improving stress of the cutter, designing the structure of cutters reasonably and analyzing the cutter failure as well as a new method of analysis and calculation of the cutter life and strength.