Fuzzy control on automatic frequency tracking of ultrasonic vibration system with high power and high quality factor Q
ZHU Wu,ZHANG Jia-min,LIU Hong-li, MENG Feng-feng, ZHANG Zhi-ming
Author NameAffiliation
ZHU Wu Shanghai University of Electric Power, Shanghai 200090, China, zjmzwzsy@126.com
ZHANG Jia-min Shanghai University of Electric Power, Shanghai 200090, China, zjmzwzsy@126.com
LIU Hong-li Shanghai University of Electric Power, Shanghai 200090, China, zjmzwzsy@126.com
MENG Feng-feng Shanghai University of Electric Power, Shanghai 200090, China, zjmzwzsy@126.com
ZHANG Zhi-ming Shanghai University of Electric Power, Shanghai 200090, China, zjmzwzsy@126.com
Abstract:
In order to realize automatic tracking drift of resonance frequency of ultrasonic vibration system with high power and high quality factor Q, adaptive fuzzy control was studied with a self-fabricated ultrasonic plastic welding machine. At first, relations between amplitude of vibration and frequency as well as main loop current and amplitude of vibration were analyzed. From this analysis, we deduced that frequency tracking process of the vibration system can be concluded as an optimizing problem of one dimensional fluctuant extremum of main loop current in vibration system. Then a method of self-optimizing fuzzy control, used for the realization of automatic frequency tracking in vibration system, is presented on the basis of self-optimizing adaptive control approach and fuzzy control approach. The result of experiments shows that the fuzzy self-optimizing method can solve the problem of tracking frequency drift very well. Response time of tracking in the system is less than 50 ms, which basically meets the requirements of frequency tracking in ultrasonic plastic welding machine.
Key words: automatic frequency tracking fuzzy control ultrasonic vibration system resonant frequency
DOI：10.11916/j.issn.1005-9113.2009.02.026
Clc Number:TB559
Fund:
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Fuzzy control on automatic frequency tracking of ultrasonic vibration system with high power and hig
本站小编 哈尔滨工业大学/2019-10-23
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