Papers by Author: Jian Jun Zhou

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Authors: Jian Jun Zhou, Yu Liang Pan, Min Huang
Abstract: Piezoelectric motors have been successfully developed for various applications like autofocus drives in camera lenses and manufacturing equipment for semiconductor production. Their high speed and accurate positioning capability, combined with a moderate holding torque, make piezo motors also very attractive for actuation purposes in spacecraft mechanisms. However, these motors require high driving voltage and have only a small driving torque. In this paper, the authors have developed a novel magnetostrictive rotary motor using Terfenol-D (Tb0.3Dy0.7Fe1.9) material as the driving elements. The small movement of the magnetostrictive actuator is scaled to 3 times by using flexible flexure hinges, a special designed mechanism is used to combine 3 such actuators to form a pure rotation movement and this movement is used to drive the rotor of the motor. Prototype of this research is made and a commonly 3-phase alternating current is used to drive the motor. Experiments are also carried on in the lab of School of Mechanical and Electrical Engineering of Hangzhou Dianzi University.
Authors: Jian Jun Zhou, J.X. Hu, Min Huang
Abstract: Geometric design procedures for the cycloidal drive with ceramic ball meshing elements were introduced. Using the theory of conjugate surfaces, the equations of meshing of the cycloid drive and the cycloid raceway profiles were derived. Design examples were presented to demonstrate the design procedure and feasibility. The ceramic balls were used as the meshing elements. Prototype of this research was made and tested with satisfying results. The results of this work are suitable for computeraided design and manufacture of industrial applications.
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