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Paper: High Fill Factor Array of Piezoelectric Micromachined
Ultrasonic Transducers with Large Quality Factor

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Vol. 32, No. 8(2), S&M2292

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Sensors and Materials, Volume 33, Number 9(4) (2021)
Copyright(C) MYU K.K.
pp. 3295-3306
S&M2689 Research Paper of Special Issue
https://doi.org/10.18494/SAM.2021.3394
Published: September 30, 2021

Adaptive Variable-speed Control for Enhancing the Performance of a Mine Counter-rotating Fan System [PDF]

Zijian Ai, Guoliang Qin, Kun-Chieh Wang, and Hao Gao

(Received March 23, 2021; Accepted July 16, 2021)

Keywords: mine counter-rotating fan, adaptive speed control, performance enhancement of ventilation

The mine counter-rotating fan (MCRF) is important in tunnel construction and is also widely used for ventilation in mining. The need to improve the performance of MCRF systems has been attracting the interest of researchers. An MCRF is composed of two vane rotors that rotate in opposite directions. We propose a novel adaptive variable-speed (AVS) control method to improve the performance of an MCRF system. The proposed method is based on the concept of adaptively controlling the speed of the second vane rotor according to changes in the working conditions of the whole fan system. To evaluate the performance of our proposed AVS control method, experiments were performed using various sensors to detect pressure and mass flow rates when using our newly designed MCRF system. Results show that, with the proposed AVS control method, the problem of the rotor output torque rising and falling markedly during large and small mass flows, respectively, is overcome. Furthermore, the problems of overload and a low blocking margin are solved. As a result, the overall pressure increase and performance of the whole fan system are improved.

Corresponding author: Kun-Chieh Wang


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Cite this article
Zijian Ai, Guoliang Qin, Kun-Chieh Wang, and Hao Gao, Adaptive Variable-speed Control for Enhancing the Performance of a Mine Counter-rotating Fan System, Sens. Mater., Vol. 33, No. 9, 2021, p. 3295-3306.



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