Frontiers of Information Technology & Electronic Engineering
>> 2017,
Volume 18,
Issue 9
doi:
10.1631/FITEE.1600035
Article
Ball-disk rotor gyroscope adaptive quick-starttechnique
. MEMS Center, Harbin Institute of Technology,Harbin 150001, China.. MOE Key Laboratory of Micro-Systemsand Micro-Structures Manufacturing, Harbin 150001, China
Available online: 2018-01-18
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Abstract
Rotating speed is a critical parameter affecting the performanceof rotor gyroscopes. Rotor gyroscopes must operate at the rated rotatingspeed. To shorten the start time of the ball-disk rotor gyroscope,this paper presents a new design of the drive system for a ball-diskrotor gyroscope. The drive system is monitored by a microcontroller.First, the microcontroller generates a sine pulse width modulationsignal to drive the permanent magnet rotor. Second, the position ofthe rotor is detected according to the back electromotive force inthe non-energized coil. Third, a piecewise closed-loop control algorithmis implemented to keep the angular acceleration of the rotor withinthe safe range automatically during the acceleration process and whenrunning at a constant speed. This control algorithm can avoid rotorstalling due to loss of steps. Experimental result shows that withthe help of adaptive quick-start technique, the start time of thedevice can be shortened by up to 36.6%.
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