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Alternating current (AC) machine speed-adjusting system plays a very important role in our daily life. Firstly, this paper studies the basic principle of vector control system for three-phase asynchronous motor based on the MT coordinate system, and this paper especially gives the calculation principle diagram of the current model for rotor flux. Then this paper establishes the double closed-loop...
It is a trouble thing to build theoretical model for stir characteristics of screw axis with variable diameters and different pitches, so a called PSO-BP neural network (NN) model was employed. In this mode, particle swarm optimization (PSO) algorithm is used to train weights and thresholds of artificial neural network instead of BP algorithm, to overcome drawbacks of BP algorithm. To avoid the slow...
To solve problems of collaborative modeling & simulation for propulsion device of special ship, a kind of multi-disciplinary simulation platform of virtual prototype based on interface was developed. ADAMS software was as core simulation tool. The analysis flow of collaborative modeling & simulation of virtual prototype was presented for hovercraft. Applied the simulation platform, design...
To study characteristics of a air propeller-gear reducer propulsion device, a scale virtual prototype of the device was established using ADAMS and Pro/E software based on virtual prototyping and parametric modeling. Kinematics and dynamics characteristics were gained through computer simulation in rated-load and in no-load. The influence of elastic coupling for propeller movement and gear meshing...
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