DocumentCode :
724457
Title :
Study of active tolerant control for encoder fault in lift stage machinery control systems based on signal reconstruction
Author :
Haijie Mao ; Wei Li ; Xiaolin Feng
Author_Institution :
Coll. of Electr. & Inf. Eng., Lanzhou Univ. of Technol., Lanzhou, China
fYear :
2015
fDate :
23-25 May 2015
Firstpage :
4619
Lastpage :
4624
Abstract :
For the encoder fault in lift stage machinery control system, an active fault tolerant control method based on signal reconstruction was proposed in the paper. Firstly, multi-scale morphological method was adopted to decompose the encoder fault signals. Considering the DIF filter´s capacity of underlining the fault characteristic, it was used as feature extraction for decomposed signals to achieve fault diagnosis of encoder. Secondly, as incremental encoder and absolute encoder were used to measure the speed and position of the lift stage respectively, redundant function was formed. So when the fault was diagnosed online, the redundancy mentioned above will be utilized by selecting proper numerical integrator and differentiator to substitute reconstructed signal for fault signal, thus an active fault tolerant strategy was implemented with switch strategy.
Keywords :
differentiation; fault tolerant control; feature extraction; filtering theory; integration; lifting equipment; signal reconstruction; DIF filter; absolute encoder; active fault tolerant strategy; active tolerant control; encoder fault control; feature extraction; incremental encoder; lift stage machinery control system; multiscale morphological method; numerical differentiator; numerical integrator; redundant function; signal reconstruction; switch strategy; Electronic mail; Fault diagnosis; Machinery; Signal reconstruction; active fault tolerant control; fault diagnosis; signal reconstruction; stage machinery control systems;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Control and Decision Conference (CCDC), 2015 27th Chinese
Conference_Location :
Qingdao
Print_ISBN :
978-1-4799-7016-2
Type :
conf
DOI :
10.1109/CCDC.2015.7162740
Filename :
7162740
Link To Document :
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