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- 저자 : Bang-Xiao Zheng (검색결과 2 건)
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Nonsingular Fast Terminal Sliding Mode Control Strategy for PMLSM Based on Disturbance Compensation
Li Zheng,Zhang Zi-Hao,Wang Jin-Song,Yan Zhi-Bang,Guo Xiao-Qiang,Sun He-Xu 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.3
To optimize the anti-interference performance and dynamic response ability of permanent magnet linear synchronous motor (PMLSM) and enhance the overall control performance of the system, the novel nonsingular fast terminal sliding mode controller (NFTSMC) based on disturbance compensation is proposed in this design. To enhance the response speed and stability of the controller, this design introduces the system state variable into the exponential reaching law to make the controller adaptively adjust with the change of the system state, which can reduce the chattering of the system and have a faster response speed. The extended sliding mode disturbance observer is designed to estimate the interference factors in the system, and the controller is feedforward compensated to further improve the anti-interference ability of the PMLSM system. Meanwhile, the control strategy is proved by the Lyapunov stability theory. Simulation and experiments show that the proposed control strategy has better dynamic response ability and anti-interference ability than the traditional NFTSMC.
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Bacillus ferrooxidans sp. nov., an iron(II)-oxidizing bacterium isolated from paddy soil
Guo-Wei Zhou,Xiao-Ru Yang,Jian-Qiang Su,Bang-Xiao Zheng,Yong-Guan Zhu 한국미생물학회 2018 The journal of microbiology Vol.56 No.7
An endospore-forming bacterium, designated YT-3T, was isolated from a paddy soil in Yingtan, Jiangxi, China. Cells of strain YT-3T were Gram-positive, rod-shaped, facultative anaerobic, catalase, and oxidase positive. The optimum growth temperature and pH were 30°C (ranged from 15 to 50°C) and 6.5–7.0 (ranged from 3 to 11), respectively. Analysis of the 16S rRNA gene sequence showed that strain YT-3T was affiliated to the genus Bacillus and displayed the highest similarity to that of Bacillus drentensis JCM 21707T (98.3%), followed by B. ginsengisoli JCM 17335T (97.8%) and B. fumarioli JCM 21708T (97.0%). The similarity of rpoB gene sequence between strain YT-3T and B. drentensis JCM 21707T, B. ginsengisoli JCM 17335T and B. fumarioli JCM 21708T was 80.4%, 81.5%, and 82.1%, respectively. The genomic DNA G + C content was 44.9 mol%. The predominant respiratory quinone was Menaquinone-7, and meso-diaminopimelic acid was present in the peptidoglycan layer of cell wall. The major fatty acids were C15:0 anteiso (36.2%), C14:0 iso (19.6%), C15:0 iso (17.4%), and C16:0 iso (9.8%). The polar lipid profile consisted of diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phospholipids, and ammoniac phospholipids. The DNA-DNA hybridization values between isolate YT-3T and B. drentensis (JCM 21707T), B. ginsengisoli (JCM 17335T), and B. fumarioli (JCM 21708T) were 36.3%, 30.3%, and 25.3%, respectively. On the basis of physiological, genetic and biochemical data, strain YT-3T represented a novel species of the genus Bacillus, for which the name Bacillus ferrooxidans sp. nov was proposed. The type strain is YT-3T (= KCTC 33875T = CCTCC AB 2017049T).
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