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J. Cent. South Univ. (2016) 23: 1406-1415 DOI: 10.1007/s11771-016-3193-y A new PMSM speed modulation system with sliding mode based on active-disturbance-rejection control RONG Zhi-lin(荣智林)1, 2... the influence of variations in rotational inertia, load and internal parameters. Key words: disturbance rejection; auto tuning; permanent magnet synchronous motor; speed modulation system 1 Introduction Motor......
RESEARCH OF FILM THICKNESS DURING DRAWING PROCESS LUBRICATED WITH O/W EMULSIONS+Yan Hengzhi1; Zhong Jue1; Wang Dianzuo2(1. Department of Mechanical Engineering. Central South University of Technology... process. we have established the mathematical model of film thickness lubricated with emulsions during drawing process, The film thickness calculated with the model under general condition is very close......
Thickness distribution of multi-stage incremental forming with different forming stages and angle intervalsLI Jun-chao(李军超), YANG Fen-fen(杨芬芬), ZHOU Zhi-qiang(周志强) (College of Materials Science... between the two adjacent stages (Δα) on thickness distribution was investigated. Firstly, a finite element method (FEM) model of multi-stage incremental forming was established and experimentally......
J. Cent. South Univ. (2016) 23: 1372-1382 DOI: 10.1007/s11771-016-3189-7 Error code analysis and selection principle of M-ary modulation in network-based control systems ZHAO Shun-li(赵顺利)1, YIN Xun..., London WC2R 2LS, U. K Central South University Press and Springer-Verlag Berlin Heidelberg 2016 Abstract: Error codes induced by M-ary modulation and modulation selection in network-based control systems......
Trans. Nonferrous Met. Soc. China 22(2012) s323-s328 Ultrasonic thickness measurement for aluminum alloy irregular surface parts based on spectral analysis CONG Sen, GANG Tie State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China Received 28 August 2012; accepted 25 October 2012 Abstract: Ultrasonic methods of measuring the thin thickness......
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Deformation behavior of A6063 tube with initial thickness deviation in free hydraulic bulging YANG Lian-fa(杨连发)1, 2, GUO Cheng (郭 成)1, DENG Yang(邓 洋)2 1. School of Mechanical Engineering... 2006 Abstract: Experiment on seamless tubes of aluminum alloy A6063 with initial thickness deviation of 0–20% was conducted through a free hydraulic bulging with tube ends free. The influence of initial......
images of the TiN/TiAlN multilayer coatings with different bilayer modulation periods. The TiN/TiAlN coatings have the thickness of 5.6-6.7 μm, as shown in Fig.8. With the increase of Al target arcing... modulation periods: (a) 60 s; (b) 90 s; (c) 120 s; (d) 150 s Fig.8 Thickness of TiN/TiAlN coatings with different bilayer modulation periods Fig.9 Adhesion strength of TiN/TiAlN coatings with different......
A new method determining safe thickness of karst cave roof under pile tipJIANG Chong(蒋冲), LIU Lang(刘浪), WU Jun-ping(吴均平)(School of Resources and Safety Engineering, Central South University, Changsha... and shells, the simplified model is calculated and the theoretical calculation formula to determine the safe thickness of cave roof under pile tip can be obtained when the edges of the cave roof are simply......
Effect of internal pressure distribution on thickness uniformity of hydroforming Y-shaped tubePENG Jun-yang1, ZHANG Wen-da1, LIU Gang1, ZHU Shi-qiang2, YUAN Shi-jian1(1. National Key Laboratory... two projects with traditional punch and multistage punch were applied to comparison. The thickness distribution and thinning ratio distribution were investigated, and the results by different punches......