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Research on fault diagnosis of B737 aircraft fuel system based on improved BP neural network 基于改进BP神经网络的B737飞机燃油系统故障诊断研究
Mathematical Models in Engineering Pub Date : 2019-03-31 DOI: 10.21595/MME.2019.20536
Shi Xiangyang
{"title":"Research on fault diagnosis of B737 aircraft fuel system based on improved BP neural network","authors":"Shi Xiangyang","doi":"10.21595/MME.2019.20536","DOIUrl":"https://doi.org/10.21595/MME.2019.20536","url":null,"abstract":"In this paper, an improved BP neural network algorithm is applied to the fault diagnosis of aircraft fuel system. The simulation results show that the algorithm has the characteristics of fast diagnosis speed and low misdiagnosis rate, and lays a foundation for the development of aircraft fuel fault diagnosis expert system based on neural network.","PeriodicalId":32958,"journal":{"name":"Mathematical Models in Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49663289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Optimization of palm methyl ester and its effect on fatty acid compositions and cetane number 棕榈甲酯的优化及其对脂肪酸组成和十六烷值的影响
Mathematical Models in Engineering Pub Date : 2019-03-31 DOI: 10.21595/MME.2019.20469
S. Satya, Aditya Kolakoti, B. Nagaraju, R. Shyamsundar, R. Rao
{"title":"Optimization of palm methyl ester and its effect on fatty acid compositions and cetane number","authors":"S. Satya, Aditya Kolakoti, B. Nagaraju, R. Shyamsundar, R. Rao","doi":"10.21595/MME.2019.20469","DOIUrl":"https://doi.org/10.21595/MME.2019.20469","url":null,"abstract":"This paper proposes the Taguchi based optimization technique for the production of biodiesel from palm oil. For this purpose, L9 orthogonal array was successfully used for better yield estimation by using Minitab-18 software. Different process variables like molar ratio, catalyst concentration, reaction time and reaction temperature were studied. A predicted yield of 92.06 % was achieved by regression analysis by maintaining the process variables of molar ratio 5:1 (methanol to oil), 4 grams of catalyst concentration (NaOH), 180 minutes of reaction time and 44°C of reaction temperature. Experimentations were conducted on the same process variables and achieved a yield of 91.65 %. By this it is clear that both experimentation and regression analysis by Taguchi are in good agreement with an error of 0.41 % which may be acclaimed as experimental error. The fatty acid compositions (FAC) were also analyzed and it is found that 37.12 % saturated and 62.88 % unsaturated fatty acids present in the palm methyl ester (PME). By using the FAC of PME the Cetane number was predicted as 55.38. The predicted Cetane number from FAC tally with experimental Cetane number. The PME is characterized for different fuel properties by following the international standards. And it is concluded that catalyst concentration and reaction temperature are the important parameters which influence PME yield, Taguchi based optimization technique will helps in predicting the maximum yield with minimum number of experiments.","PeriodicalId":32958,"journal":{"name":"Mathematical Models in Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48731421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Dynamic characteristic analysis on the bit lateral steering force of push-the-bit rotary steerable bottom hole assembly 推钻旋转导向井底钻具组合横向导向力动态特性分析
Mathematical Models in Engineering Pub Date : 2018-12-31 DOI: 10.21595/MME.2018.20235
Heng Wang, Z. Guan, Guo-shan Zhao
{"title":"Dynamic characteristic analysis on the bit lateral steering force of push-the-bit rotary steerable bottom hole assembly","authors":"Heng Wang, Z. Guan, Guo-shan Zhao","doi":"10.21595/MME.2018.20235","DOIUrl":"https://doi.org/10.21595/MME.2018.20235","url":null,"abstract":"A dynamic finite element model was established to characterize the motion state of the rotary steerable bottom hole assembly (RSBHA). Then the steering lateral force on bit was obtained after the motion equation was solved. The relation between the bit steering force and the pads offset pointing towards the high side direction of the borehole was gotten and the effects of the rotary speed on the bit lateral steering force were analyzed. Results showed that the near-bit stabilizer would contact the wellbore wall with the increasing of the pads offset, resulting in an inflection point presenting on the relation curve between the bit inclination force and the pads offset value. The larger pads offset value was, the more concentrated bit side cutting would be. Rotary speed had a small effect on time average of the bit lateral steering force but could enlarge the action range on both sides of the high side direction of the borehole.","PeriodicalId":32958,"journal":{"name":"Mathematical Models in Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47039092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Erratum: The simulation analysis of lifting type tractor’s ride comfort based on ADAMS/view 勘误表：基于ADAMS/view的举升式拖拉机平顺性仿真分析
Mathematical Models in Engineering Pub Date : 2018-12-31 DOI: 10.21595/mme.2018.20277
Jubin Qiao, H. Yan, Zhiyong Wang
{"title":"Erratum: The simulation analysis of lifting type tractor’s ride comfort based on ADAMS/view","authors":"Jubin Qiao, H. Yan, Zhiyong Wang","doi":"10.21595/mme.2018.20277","DOIUrl":"https://doi.org/10.21595/mme.2018.20277","url":null,"abstract":"","PeriodicalId":32958,"journal":{"name":"Mathematical Models in Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48517900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Circular-linear model of the force of dry friction 干摩擦力的圆-线性模型
Mathematical Models in Engineering Pub Date : 2018-12-31 DOI: 10.21595/MME.2018.20503
K. Ragulskis, A. Bubulis, R. Maskeliunas, P. Paškevičius, L. Ragulskis
{"title":"Circular-linear model of the force of dry friction","authors":"K. Ragulskis, A. Bubulis, R. Maskeliunas, P. Paškevičius, L. Ragulskis","doi":"10.21595/MME.2018.20503","DOIUrl":"https://doi.org/10.21595/MME.2018.20503","url":null,"abstract":"In the numerical methods taking into account the force of dry friction numerical approximation is used when performing calculations. Circular-linear approximation for the local transition region is recommended. Results of numerical calculations are presented. The advantages of using this proposed representation are seen from the obtained results presented in this paper.","PeriodicalId":32958,"journal":{"name":"Mathematical Models in Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46551602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Dynamic modeling and simulation of three-member robot manipulator 三机构机械手的动力学建模与仿真
Mathematical Models in Engineering Pub Date : 2018-12-31 DOI: 10.21595/MME.2018.20319
Hristijan Mickoski, Ivan Mickoski, Marjan Djidrov
{"title":"Dynamic modeling and simulation of three-member robot manipulator","authors":"Hristijan Mickoski, Ivan Mickoski, Marjan Djidrov","doi":"10.21595/MME.2018.20319","DOIUrl":"https://doi.org/10.21595/MME.2018.20319","url":null,"abstract":"Dynamic model analysis of manipulator as mechanical structure is presented for further purpose in actuator selection and process for establishing control strategy. Control problems involves determination of control forces and moments applied in manipulator joints that will ensure movements along a certain defined trajectory. Trajectory design is the basis for the manipulator control process. This problem is quite complex because the manipulator is a connected system in which the movement of a member affects the movement of other. Therefore, in following is presented a method for forces and moments determination in kinematic joints of a three-member manipulator analytically and also by using simulation dynamical model in the Matlab/Simulink program package. The friction forces in the kinematics joints are not taken into account.","PeriodicalId":32958,"journal":{"name":"Mathematical Models in Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42453927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Investigation of elliptical approximation in the model of the force of dry friction 干摩擦力模型中椭圆近似的研究
Mathematical Models in Engineering Pub Date : 2018-09-30 DOI: 10.21595/MME.2018.20001
K. Ragulskis, A. Bubulis, P. Paškevičius, A. Pauliukas, L. Ragulskis
{"title":"Investigation of elliptical approximation in the model of the force of dry friction","authors":"K. Ragulskis, A. Bubulis, P. Paškevičius, A. Pauliukas, L. Ragulskis","doi":"10.21595/MME.2018.20001","DOIUrl":"https://doi.org/10.21595/MME.2018.20001","url":null,"abstract":"In the numerical procedures involving the force of dry friction some type of numerical approximation for this investigated phenomenon is used in the process of calculations. Elliptic approximations for the local transition region are proposed, and numerical results are presented in this paper. The smoothness and continuity of this approximation is demonstrated by several computational experiments.","PeriodicalId":32958,"journal":{"name":"Mathematical Models in Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46215139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Analytical solution for modal analysis of Euler-Bernoulli and Timoshenko beam with an arbitrary varying cross-section 任意变截面Euler-Bernoulli和Timoshenko梁模态分析的解析解
Mathematical Models in Engineering Pub Date : 2018-09-30 DOI: 10.21595/MME.2018.20116
F. Sohani, H. Eipakchi
{"title":"Analytical solution for modal analysis of Euler-Bernoulli and Timoshenko beam with an arbitrary varying cross-section","authors":"F. Sohani, H. Eipakchi","doi":"10.21595/MME.2018.20116","DOIUrl":"https://doi.org/10.21595/MME.2018.20116","url":null,"abstract":"In this article, the free vibrations of Euler-Bernoulli and Timoshenko beams with arbitrary varying cross-section are investigated analytically using the perturbation technique. The governing equations are linear differential equations with variable coefficients and the Wentzel, Kramers, Brillouin approximation is adopted for solving these eigenvalue equations and determining the natural frequencies and mode shapes. This method relates the solution of equations with the solving of some successive algebraic equations. A parametric study is performed and the effects of different profiles and different combinations of boundary conditions on the natural frequencies are investigated. To confirm the reliability of the present method, the analytical results are checked with those obtained from the finite elements method and other literatures which are found to be in a good agreement. The calculations show that the presented procedure is very effective to find the modal characteristics of the varying cross-sections beams.","PeriodicalId":32958,"journal":{"name":"Mathematical Models in Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44801481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
The simulation analysis of lifting type tractor’s ride comfort based on ADAMS/view 基于ADAMS/view的举升式拖拉机平顺性仿真分析
Mathematical Models in Engineering Pub Date : 2018-09-30 DOI: 10.21595/MME.2018.19949
Jubin Qiao, Haijing Yan, Zhiyong Wang
{"title":"The simulation analysis of lifting type tractor’s ride comfort based on ADAMS/view","authors":"Jubin Qiao, Haijing Yan, Zhiyong Wang","doi":"10.21595/MME.2018.19949","DOIUrl":"https://doi.org/10.21595/MME.2018.19949","url":null,"abstract":"Heavy tractors always work in full load, shock loading and vibration environment. The working environment is harsh, besides the vibration of the cab can easily cause driver fatigue and affect the driving comfort and safety. In this paper, taking a type of lifting tractor as a research object, the vehicle simulation model and the road model was established by ADAMS/VIEW software to simulate the vehicle's ride comfort, the weighted RMS acceleration of the cab floor in random input and the maximum vertical acceleration of the cab seat in pulse input was calculated. The calculation results and the ride comfort evaluation standard were compared and analyzed, which laid the theoretical foundation for the design and optimization of tractor’s cab.","PeriodicalId":32958,"journal":{"name":"Mathematical Models in Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46652911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Application of air disc brake in mining electric locomotive 空气盘式制动器在矿用电力机车上的应用
Mathematical Models in Engineering Pub Date : 2018-09-30 DOI: 10.21595/MME.2018.19975
Zhaosong Li, B. Liang, Jilei Xu
{"title":"Application of air disc brake in mining electric locomotive","authors":"Zhaosong Li, B. Liang, Jilei Xu","doi":"10.21595/MME.2018.19975","DOIUrl":"https://doi.org/10.21595/MME.2018.19975","url":null,"abstract":"In order to shorten the braking distance of mining electric locomotive and improve the safety of underground transportation effectively. The existing handwheel-brake shoe brake device is analyzed. In view of its shortcomings, an air disc brake device and a tread sweeper are put forward. Through calculation verification and simulation analysis, it is found that the device can shorten the braking distance of mining electric locomotive effectively and it can meet the requirements of The Specification of Narrow Tramroad Gauge Electric Locomotive for Mine. It has a certain degree of application value and practical significance.","PeriodicalId":32958,"journal":{"name":"Mathematical Models in Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43163908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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