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Constant torque control in machining processes reduces the cycling time and energy consumption, while protecting the machine tool and cutting tool at the same time. This paper presents an adaptive fuzzy control system for optimizing the cutting torque in gear hobbing process. And during the machining process, the input and output scaling factors of the fuzzy controller can also be adjusted automatically...
A novel eddy current damper with hybrid excitation is presented in this paper. The eddy current damper contains two hybrid excitation components and a moving conductor plate. The hybrid excitation component is consisted of primary coil, the primary iron core and permanent magnet. The conductor plate is sandwiched between two excitation components. Analyses of the proposed damper are conducted with...
This paper proposes a concept of free piston linear generator (FPLG) range-extender for the application of hybrid electric vehicles (HEVs). The coupling thermodynamics model of the FPLG range-extender is developed mathematically. Its stable operation characteristics are analyzed accordingly. In addition, the effects of the variations of the key operational parameters on the effective output power...
This paper studies the dynamic response of a highspeed ball-screw drive in a machine tool feed system. The Timoshenko beam theory is employed to model the rotating screw, while the nut is modeled as a lumped moving mass subjected to an external force resolved into three mutually perpendicular components. The dynamic model of the ball-screw drive is formulated based on the assumed mode method. To study...
Large air cooling fan system is made up of many fans. The dynamic response of the fan bridge truss is very complicated when the fans are running simultaneously. Four fans and their supporting structures are selected from the fan system as analysis object. By finite element method, vibration response produced by 15 kinds of the combinations of running of fans is analyzed. Result shows that interaction...
This paper researches on renewable energy proportion in the integrated energy, and proposes the development of renewable energy driving force to achieve the share target first. To the driving force, logic integration for industry chain and number integration for production and marketing have been done. Thus, the framework of renewable energy development can be reached. Based on this, the author puts...
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