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Archive of Advanced Engineering Science — Volume 52 (2020), Issue 6

Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : 401
Title : Dynamical Force Characteristics for Helical Planetary Gear Considering Loaded Tooth Contact of Multi-gears
Jiang J, , Fang Z, , Liu H,
Abstract : A coupled dynamic model, which contains helical gears-shafts-bearings for a wind turbine gearbox transmission system, was built considering nonlinear factors of the time-varying mesh stiffness, the external varying load, and the dynamic transmission error at first. The model is confirmed to be right after comparing the theoretical data with the experimental load sharing values, and also it is found that the static load sharing is conservative to evaluate the non-equilibrium effect of a planetary
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Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : 402
Title : Evaluation Method of Blasting Vibration Comfort on Basis of Annoyance Rate
Yao Q, , Yang X, , Chai M, , Li H,
Abstract : The seismic effect created by blasting operations vibrates adjacent buildings and disturbs residents living in these buildings, often leading to disputes and complaints. In this paper, the vibration acceleration was calculated based on the measured blasting vibration velocity using the wavelet denoising-based four-point forward difference method. The infinite impulse response (IIR) digital filter was used to obtain the frequency weighting of acceleration, so as to calculate comfort assessment in
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Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : 403
Title : Experimental Study on Permeability Characteristics of Undisturbed Iron Tailings
YANG Xi, , ZHANG Yunpeng, , GAN Deqing, , JIA Yuna,
Abstract : The permeability characteristics of iron tailings are one of the important factors affecting the stability of the dam. The permeability coefficient is an important indicator of its permeability. Many formulas for calculating permeability coefficient have been proposed by scholars at home and abroad. However, these formulas are mostly applicable to coarse-grained soil, and its applicability to iron tailings is not clear. Therefor it is necessary to verify the accuracy of these formula and establi
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Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : 404
Title : Gain Fuzzy Adaptive Double Power Reaching Law for Sliding Mode Control of Ball Screw Pair
TANG Liang, , LU Wenzheng, , GONG Fayun, , ZHANG Dongjie, , XU Guanghui,
Abstract : In order to improve the cutting speed control performance of the ball screw sub-laser cutting platform, based on the principle of double power reaching law and fuzzy control a controller of gain fuzzy adaptive double power reaching law was designed. The Lagrangian dynamic model of the ball screw pair motion system was established by lumped parameter method for considering the various axial and torsional vibrations of ball screw pair. Meanwhile, the Stribeck friction model was introduced to estim
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Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : 405
Title : Research Progress in the Modification of Nickel-rich Cathode Materials
Guo X, , Xu C, , Xiang W, , Wu Z, , Zhong B,
Abstract : In recent years, the development of new energy vehicles industry is accelerating. Lithium nickel cobalt manganese/aluminum oxide ternary cathode materials (NCM/NCA), especially with the nickel content ≥50%, has aroused great interest in both academia and industry. This is mainly due to the fact that the aggregative parameters of performance and cost of NCM/NCA are superior to those of traditional cathode materials, such as LiCoO2 and LiFePO4. However, the application of NCM/NCA is affected by
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