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Online asymmetry estimation for whole angle mode coriolis vibratory gyroscopes by high frequency injection

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Defence Technology（防务技术） 2023年第6期24卷 314-325页

作者： Xiang-rui meng Chong Li Yu-chen Wang Department of Automation and Measurement Ocean University of ChinaQingdao266000China

The whole angle mode gyroscope(WAMG)is considered to be the next generation architecture,but it is suffered from the asymmetry errors to conduct real *** paper proposes a novel high frequency injection based approach for the error parameters online identification for the *** significance is that it can separate physical and error fingerprints to enable online *** nonlinear WAMG dynamics are discretized to meet the requirement of numerical precision and computation *** optimized estimation methods are then constructed and compared to track asymmetry error parameters *** the validation part,its results firstly prove that the proposed scheme can accurately identify constant asymmetry parameters with an overall tracking error of less than 1 ppm and the extreme numerical convergence can reach 10^(-12)*** the dynamic asymmetry variation condition,the root mean square errors(RMSE)indicate that the tracking accuracy can reach the level of10^(-3),which shows the robustness of the proposed *** summary,the proposed method can effectively estimate the WAMG asymmetry errors online with satisfied performance and practical values.

关键词： Rate-integrating gyroscope(RIG) Whole angle mode gyroscope(WAMG) Coriolis vibrating gyroscope(CVG) Online calibration Online identification Online estimation

Design and Experimental Verification of a Roll Control Strategy for Large Wingspan Flapping-Wing Aerial Vehicle

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Journal of Bionic Engineering 2024年第4期21卷 1644-1661页

作者： rui meng Bifeng Song Jianlin Xuan Xiaojun Yang Dong Xue School of Aeronautics Northwestern Polytechnical UniversityXi’an710072China Research and Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen518057China Yangtze River Delta Research Institute of Northwestern Polytechnical University Taicang215400China

Most flapping-wing aircraft wings use a single degree of freedom to generate lift and thrust by flapping up and down,while relying on the tail control surfaces to manage ***,these aircraft have certain limitations,such as poor accuracy in attitude control and inadequate roll control *** paper presents a design for an active torsional mechanism at the wing's trailing edge,which enables differential variations in the pitch angle of the left and right wings during *** simple mechanical form significantly enhances the aircraft's roll control *** experimental verification of this mechanism was conducted in a wind tunnel using the RoboEagle flapping-wing aerial vehicle that we *** study investigated the effects of the control strategy on lift,thrust,and roll moment during flapping ***,the impact of roll control on roll moment was examined under various wind speeds,flapping frequencies,angles of attack,and wing ***,several rolling maneuver flight tests were performed to evaluate the agility of RoboEagle,utilizing both the elevon control strategy and the new roll control *** results demonstrated that the new roll control strategy effectively enhances the roll control capability,thereby improving the attitude control capabilities of the flapping-wing aircraft in complex wind field *** conclusion is supported by a comparison of the control time,maximum roll angle,average roll angular velocity,and other relevant parameters between the two control strategies under identical roll control input.

关键词： Roll control Bio-inspired Roll moment Flapping wing aerial vehicle

Interaction mechanism between coal combustion products and coke in raceway of blast furnaces

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Journal of Iron and Steel Research International 2017年第1期24卷 8-17页

作者： Chong Zou Liang-ying Wen Jun-xue Zhao rui-meng Shi School of Metallurgical Engineering Xi'an University of Architecture and Technology School of Materials Science and Engineering Chongqing University

The interaction mechanism between the combustion products of pulverized coal injected and coke in the raceway of blast furnace was studied through thermodynamic calculation and *** results indicated that additives significantly affected the melting property of coal ash in high temperature *** the unburnt char,raw coal ash,and catalyzed coal ash failed to wet the coke surface,the wettability of the catalyzed coal ash on the coke was greater than that of the raw coal *** the unburnt char had weak reaction with the coke surface,it showed little influence on the surface morphology of the *** interaction between the raw coal ash and the coke gave rise to the increase in the pore size on the coke ***,the raw coal ash only affected the coke surface and the entrances of the pores owing to its poor *** being melted,the catalyzed coal ash was expected to immerge into the inside part of the coke and then react with the coke,resulting in an expansion and increase of coke *** raw coal ash and the unburnt char reduced the coke reactivity,while the catalyzed coal ash improved the coke ***,the coal ash containing Fe2O3 exhibited a larger influence on the reactivity than that containing CaO.

关键词： Coal Coke Tuyere raceway Blast furnace Pulverized coal injection Interaction mechanism

Waves propagating over a two-layer porous barrier on a seabed

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Journal of Hydrodynamics 2018年第3期30卷 453-462页

作者： Qiang Lin Qing-rui meng Dong-qiang Lu China Ship Scientific Research Center Wuxi 214082China Shanghai Oriental Maritime Engineering Technology Company Limited Shanghai 200011China Shanghai Institute of Applied Mathematics and Mechanics Shanghai UniversityShanghai 200072China Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai 200072China

A research of wave propagation over a two-layer porous barrier, each layer of which is with different values of porosity and friction, is conducted with a theoretical model in the frame of linear potential flow theory. The model is more appropriate when the seabed consists of two different properties, such as rocks and breakwaters. It is assumed that the fluid is inviscid and incompressible and the motion is irrotational. The wave numbers in the porous region are complex ones, which are related to the decaying and propagating behaviors of wave modes. With the aid of the eigenfunction expansions, a new inner product of the eigenfunctions in the two-layer porous region is proposed to simplify the calculation. The eigenfunctions, under this new definition, possess the orthogonality from which the expansion coefficients can be easily deduced. Selecting the optimum truncation of the series, we derive a closed system of simultaneous linear equations for the same number of the unknown reflection and transmission coefficients. The effects of several physical parameters, including the porosity, friction, width, and depth of the porous barrier, on the dispersion relation, reflection and transmission coefficients are discussed in detail through the graphical representations of the solutions. It is concluded that these parameters have certain impacts on the reflection and transmission energy.

关键词： Two-layer porous barrier inner product matched eigenfunction expansions

Chloroaluminate ionic liquid catalyzed isomerization of n-pentane in the presence of product distribution improver

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Petroleum Science 2011年第2期8卷 219-223页

作者： Xia Rong＇an Zhang rui meng Xianghai Liu Zhichang meng Jiaying Xu Chunming State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China

The ionic liquid Et3NHC1-2AIC13 can catalyze the isomerization of n-pentane. This paper investigates the ionic liquid catalyzed isomerization performance of n-pentane with several product distribution improvers in an autoclave. The product distribution of n-pentane isomerization could be improved by such improvers as benzene, cyelohexane, and methyl cyclohexane at the expense of conversion of n-pentane. The optimal product distribution improver was determined to be cyclohexane. The yield of isomerate and the selectivity of liquid isoalkanes increased, whereas the conversion of n-pentane decreased, with increasing cyclohexane amount. At the same conversion of n-pentane, the research octane number （RON） of liquid product, with cyclohexane amount of 0.5 wt%, was about 1.3 higher than that without cyclohexane. At the same reaction conditions, the presence of cyclohexane enhanced the yield of isomerate, the selectivity of liquid isoalkanes, and the RON of the liquid product, but reduced the conversion of n-pentane.

关键词： Isomerization ionic liquid improver pentane cyclohexane

Analysis of Phthalate Esters in Air, Soil and Plants in Plastic Film Greenhouse

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Chinese Chemical Letters 2002年第6期13卷 557-560页

作者： Xi Kui WANG Wei Lin GUO Ping rui meng Jia An GAN College of Chemistry and Environmental Science University of JinanJinan 250022

The phthalate esters such as DMP, DEP, DBP and DEHP in air, soil and plant samples in plastic film greenhouse were clean up with fine silica gel column and determined with HPLC. It was found that the concentrations of PEs in air and soil samples in plastic film greenhouse are much higher than those of contrast samples. But concentrations of PEs in plants in plastic film greenhouse are not remarkably affected by the pollution of air and soil.

关键词： Phthalate esters plastic film greenhouse analysis.

Third-Order Stokes Wave Solutions of the Free Surface Capillary- Gravity Wave and the Interfacial Internal Wave

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China Ocean Engineering 2017年第6期31卷 781-787页

作者： meng rui-jun CUI Ji-feng CHEN Xiao-gang ZHANG Bao-le ZHANG Hong-bo College of Science Inner Mongolia University of Technology Hohhot 010051 China

Based on the Stokes wave theory, the capillary-gravity wave and the interfacial internal wave in two-layer constant depth＇s fluid system are investigated. The fluids are assumed to be incompressible, inviscid and irrotational. The third-order Stokes wave solutions are given by using a perturbation method. The results indicate that the third-order solutions depend on the surface tension, the density and the depth of each layer. As expected, the first-order solutions are the linear theoretical results （the small amplitude wave theoretical results）. The second-order and the third-order solutions describe the nonlinear modification and the nonlinear interactions. The nonlinear impact appears not only in the n （n〉~2） times＇ high frequency components, but also in the low frequency components. It is also noted that the wave velocity depends on the wave number, depth, wave amplitude and surface tension.

关键词： surface tension capillary-gravity waves Stokes wave theory third-order Stokes wave solutions

Pulmonary alveolar proteinosis complicated with tuberculosis:A case report

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World Journal of Clinical Cases 2021年第17期9卷 4400-4407页

作者： Hao Bai Zi-rui meng Bin-Wu Ying Xue-Rong Chen Department of Laboratory Medicine West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Respiratory and Critical Care Medicine West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND Pulmonary alveolar proteinosis(PAP)is a rare lung disease characterized by the accumulation of phospholipoproteinaceous material in the *** of PAP complicated with tuberculosis are much more complex and have rarely been well *** SUMMARY We describe a 21-year-old Han Chinese patient with suspicious lung infection associated with mild restrictive ventilatory dysfunction and diffusion *** resolution computed tomography revealed a“crazy-paving”appearance and multiple pulmonary miliary nodules around the *** lavage demonstrated a small amount of periodic acid-Schiff positive proteinaceous materials.A serological test for the presence of a Mycobacterium tuberculosis antibody and an interferon-gamma release assay were both *** patient received a standard course of first-line anti-tuberculosis treatment after diagnostic bronchoalveolar *** date,clinical remission has been achieved and maintained for five *** In summary,the diagnosis of PAP complicated with tuberculosis was supported by a combination of clinical manifestations,imaging,pulmonary function,laboratory examinations,bronchoalveolar lavage,*** case highlighted that diagnostic bronchoalveolar lavage in combination with anti-tuberculosis treatment is a safe and effective option for mild PAP patients with tuberculosis.

关键词： Pulmonary alveolar proteinosis Pulmonary tuberculosis Bronchoalveolar lavage Case report

Reduction behavior of iron ore powder by high-volatile coal in thermogravimetric-gas chromatographic and kinetic analysis

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Journal of Iron and Steel Research International 2024年第1期31卷 92-107页

作者： rui-meng Shi Qi-yuan Mi Bin Li Xiao Shi Chong Zou Jing Guo Han-jie Guo School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710055ShaanxiChina China International Engineering Consulting Corporation Beijing100048China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China

The reduction behavior of iron ore powder by high-volatile coal was investigated,and its kinetic mechanism was *** effect of volatiles in coal on the reduction reaction of iron ore was compared by utilizing a Xinjiang lignite with a high volatile content and its pyrolysis carbon produced by high-temperature pyrolysis to remove volatiles,serving as a *** mass loss and gas composition of the samples during the reduction process were detected using thermo-gravimetric analysis and gas chromatography,and the morphological changes of iron ore powder were observed through scanning electron *** kinetic parameters of the iron oxide reduction reaction were calculated by the Flynn-Ozawa-Wall method,and the kinetic mechanism of volatile participation in the iron oxide reduction reaction was determined through the Coats-Redfern *** results indicate that the coupling effect between the high-volatile coal pyrolysis and reduction reactions occurs during the second stage of the entire coupling process,which corresponds to the late stage of coal pyrolysis with a substantial release of H_(2)and *** volatiles in coal actively participated in the reduction reaction,reducing the initiation temperature of the reaction by around 200℃.The reduction of iron oxides by high-volatile coal was jointly promoted by the"hydrogen cycle"and"carbon cycle",resulting in a higher reduction extent and metallization rate at the end of the *** high-volatile coal was used as the reductant,the average activation energy for the entire process was 76.5 kJ/mol,a significant decrease compared to the employment of pyrolysis carbon without volatiles as the reductant(1167 kJ/mol).

关键词： Direct reduction High-volatile coal Volatile Kinetics Reduction mechanism