Volume 10: 2019 International Power Transmission and Gearing Conference最新文献

An Improved Model for Calculating the Mesh Stiffness of Helical Gears 一种改进的斜齿轮啮合刚度计算模型

Volume 10: 2019 International Power Transmission and Gearing Conference Pub Date : 2019-11-25 DOI: 10.1115/detc2019-97191

Jing-hua Wei, Shaoshuai Hou, Aiqiang Zhang, Chunpeng Zhang

{"title":"An Improved Model for Calculating the Mesh Stiffness of Helical Gears","authors":"Jing-hua Wei, Shaoshuai Hou, Aiqiang Zhang, Chunpeng Zhang","doi":"10.1115/detc2019-97191","DOIUrl":"https://doi.org/10.1115/detc2019-97191","url":null,"abstract":"\u0000 Time-varying mesh stiffness (TVMS) is one of the important internal excitations of gear transmission systems. Accurate solution of meshing stiffness is the key to research the vibration response of gear transmission system. In the traditional analytical method (TAM), the TVMS of single-teeth engaged region consist of bending, shearing, axial compression deformation stiffness, fillet-foundation stiffness, and Hertzian contact stiffness, the TVMS of double-tooth engaged region is the sum of the single-tooth engaged region, which will lead to repeated calculation of the fillet-foundation stiffness. In order to overcome this shortcoming, considering the coupling effect between two pairs of meshing tooth, an improved method of fillet-foundation is adopted to calculate to TVMS of each slice gear. According to the ‘slicing method’, the helical gear is divided into slice gear. Considering the coupling effect of each slice gear, the TVMS of helical gear can be obtained. The improved analytical method (IAM) is verified by comparing with finite element method (FEM) and TAM. Based on the IAM, the effects of the helical angle, face width, the number of gear, and modification coefficient on the mesh characteristics are analyzed. The results show that the IAM is consistent with the FEM and also consistent with TAM in single-tooth engagement. However, there is obviously error with the TAM in double-tooth or multi-tooth engagement.","PeriodicalId":159554,"journal":{"name":"Volume 10: 2019 International Power Transmission and Gearing Conference","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128231251","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

Mesh Stiffness Calculation of Spur Gears With Tooth Surface Crack 含齿面裂纹直齿齿轮啮合刚度计算

Volume 10: 2019 International Power Transmission and Gearing Conference Pub Date : 2019-11-25 DOI: 10.1115/detc2019-97857

Luke Zhang, Y. Shao

引用次数: 0

Power Loss Measurements of Rolling Element Bearings Subject to Combined Radial and Axial Loads 滚动轴承在径向和轴向联合载荷作用下的功率损耗测量

Volume 10: 2019 International Power Transmission and Gearing Conference Pub Date : 2019-11-25 DOI: 10.1115/detc2019-97438

Kevin Vedera, I. Hong, David Talbot, A. Kahraman, Sen Zhou

{"title":"Power Loss Measurements of Rolling Element Bearings Subject to Combined Radial and Axial Loads","authors":"Kevin Vedera, I. Hong, David Talbot, A. Kahraman, Sen Zhou","doi":"10.1115/detc2019-97438","DOIUrl":"https://doi.org/10.1115/detc2019-97438","url":null,"abstract":"\u0000 Power losses of load carrying gear and bearing components of automotive transmissions have become a major research area in recent years. Measurement of power loss of a gearbox is a routine task where losses from rolling element bearings, gear meshes and seals collectively define the total loss. However, separating bearing and gear mesh losses is not possible, as a gear mesh cannot be operated without support bearings. This study aims at developing a methodology for measuring power losses of rolling element bearings of different types operated under realistic load, speed and temperature conditions. A test machine concept is implemented to apply combined radial and axial loads to a pair of test bearings in a stable and repeatable manner, with rotational speed and lubrication parameters controlled tightly during tests. The proposed test methodology is employed to evaluate power loss for three different types of bearings. Load-dependent and load-independent components of power loss are separated, and influence of speed and load values on bearing mechanical loss are quantified. A repeatability study of the machine and methodology is also presented to demonstrate the accuracy of the proposed setup.","PeriodicalId":159554,"journal":{"name":"Volume 10: 2019 International Power Transmission and Gearing Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131981035","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

Numerical Simulation for Optimizing Tooth Profile Using Bezier Curve 用Bezier曲线优化齿形的数值模拟

Volume 10: 2019 International Power Transmission and Gearing Conference Pub Date : 2019-11-25 DOI: 10.1115/detc2019-97009

K. Qiu, R. Samadi

引用次数: 0

Stylization for Gear Tooth Surfaces With Different Machining Processes Using Graphic Analysis 用图形分析方法对不同加工工艺的齿轮齿面进行风格化

Volume 10: 2019 International Power Transmission and Gearing Conference Pub Date : 2019-11-25 DOI: 10.1115/detc2019-97776

Junichi Hongu, Hiroki Noborio, T. Koide, A. Tamura

引用次数: 0

An Analytical Investigation of the Impact of Design Parameters on the Performance of Centrifugal Pendulum Vibration Absorbers 设计参数对离心摆式减振器性能影响的分析研究

Volume 10: 2019 International Power Transmission and Gearing Conference Pub Date : 2019-11-25 DOI: 10.1115/detc2019-98018

Bahadir Sarikaya, M. Inalpolat, Hyun Ku Lee, M. Kim

{"title":"An Analytical Investigation of the Impact of Design Parameters on the Performance of Centrifugal Pendulum Vibration Absorbers","authors":"Bahadir Sarikaya, M. Inalpolat, Hyun Ku Lee, M. Kim","doi":"10.1115/detc2019-98018","DOIUrl":"https://doi.org/10.1115/detc2019-98018","url":null,"abstract":"\u0000 A generalized nonlinear time-varying, planar dynamic model of bifilar centrifugal pendulum vibration absorbers (CPVA) is proposed. This dynamic model enables fast prediction of vibration reduction performance of any CPVA design considering the impact of absorber rollers, gravity, end stops and translational motion of the system. The modeling framework provides comparative, simultaneous simulation results for numerous different design possibilities, and thus can be used to optimize CPVA designs. The dynamic model is generic and can handle N individually designed absorbers on a rotor with numerous path options ranging from circular to cycloid. Absorbers can be designed to be equally or unequally spaced. In this study, first the dynamic model of the bifilar CPVAs is derived. Then, case studies are provided to showcase the capabilities of the modeling framework. Initially, maximum applicable dynamic torque to a CPVA and vibration reduction performance are investigated by considering the effect of tuning order and different absorber path options for different operating speeds. Then, impact of different modelling features on system frequency response and limit dynamic torque is investigated. Interactions between the important design parameters are highlighted. Finally, the influence of end stop positioning on the CPVA dynamic response is illustrated.","PeriodicalId":159554,"journal":{"name":"Volume 10: 2019 International Power Transmission and Gearing Conference","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123753496","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

An Analytical Investigation of Rattle Characteristics of Powder Metal Gears 粉末金属齿轮颤振特性分析研究

Volume 10: 2019 International Power Transmission and Gearing Conference Pub Date : 2019-11-25 DOI: 10.1115/detc2019-98026

Elizabeth Slavkovsky, M. Inalpolat, A. Flodin

引用次数: 0

Hypocycloid Gear Mechanism Versus Slider-Crank Mechanism in Engines 发动机中的准摆线齿轮机构与滑块曲柄机构

Volume 10: 2019 International Power Transmission and Gearing Conference Pub Date : 2019-11-25 DOI: 10.1115/detc2019-97802

Mostafa A ElBahloul, El-Sayed Aziz, C. Chassapis

{"title":"Hypocycloid Gear Mechanism Versus Slider-Crank Mechanism in Engines","authors":"Mostafa A ElBahloul, El-Sayed Aziz, C. Chassapis","doi":"10.1115/detc2019-97802","DOIUrl":"https://doi.org/10.1115/detc2019-97802","url":null,"abstract":"\u0000 This effort investigates the feasibility of using the Hypocycloid Gear Mechanism (HGM) as an alternative to the conventional slider-crank mechanism for Internal Combustion Engine (ICE) applications. Engines incorporating the conventional slider-crank mechanism are subjected to high frictional power losses mainly due to the piston-rod assembly and the associated complex motion of the connecting rod. The unique HGM engine provides the means for the piston-rod assembly to reciprocate in a straight-line motion along the cylinder axis, thus eliminating the piston side-thrusting into the cylinder wall. To analyze the performance advantages of the HGM engine, a Matlab/Simulink model is developed for the simulation of a single-cylinder HGM engine from the throttle to the crankshaft output. The model integrates several sub-models for combustion, gas flow, heat transfer, and friction power loss of the internal gear train meshes, rolling bearings, and sliding bearings. The design of the planetary crank gearing system to satisfy the design specifications of ICE, has been derived using standard design procedures provided by AGMA. Calculated efficiency and power diagrams are plotted and compared with the performance of conventional engines in the literature. The results show that the HGM can satisfy modern ICE design requirements, achieve better engine performance characteristics, and minimize the frictional power losses. The HGM engine achieved lower frictional power losses by an average 33% of the conventional engine losses while its mechanical efficiency is enhanced by up to +24% with respect to the conventional engine.","PeriodicalId":159554,"journal":{"name":"Volume 10: 2019 International Power Transmission and Gearing Conference","volume":"214 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124208160","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

Research on Driving Style Classification for Shift Schedule of Dual Clutch Transmissions 双离合变速器换挡计划驾驶风格分类研究

Volume 10: 2019 International Power Transmission and Gearing Conference Pub Date : 2019-11-25 DOI: 10.1115/detc2019-97743

Yonggang Liu, Jiming Wang, Pan Zhao, Dongye Sun, Yang Yang, D. Qin

{"title":"Research on Driving Style Classification for Shift Schedule of Dual Clutch Transmissions","authors":"Yonggang Liu, Jiming Wang, Pan Zhao, Dongye Sun, Yang Yang, D. Qin","doi":"10.1115/detc2019-97743","DOIUrl":"https://doi.org/10.1115/detc2019-97743","url":null,"abstract":"\u0000 As one of the most promising vehicle automatic transmission, the dual clutch transmissions (DCT) have become a research hotspot. In order to formulate different shift schedules of DCT to meet economic and comfort requirements, it is necessary to classify and identify driving styles based on vehicle driving data. Accurate classification of driving style is a prerequisite for effective identification, and in this research, a driving style classification method is built based on feature engineering. First, a specified road test is conducted considering the influence factors, in which the driving data is collected, and the driving style is subjectively evaluated. Subsequently, the information entropy is applied to discretize the velocity and the degree of accelerator pedal degree, where 44 feature quantities are extracted to characterize the driving style. Taking into account strong correlation and redundancy between the constructed feature quantities, the principal component analysis (PCA) is employed to reduce the dimension. Finally, the fuzzy c-means (FCM) clustering algorithm is used to classify the driving style. The successful classification rate can reach 92.16% of the subjective scoring result, and is improved by 9.81% comparing with traditional feature quantities. The results show the effectiveness of the proposed driving style classification method, which lays a foundation for the adaptive control of different driving styles for the establishment of an intelligent DCT control system.","PeriodicalId":159554,"journal":{"name":"Volume 10: 2019 International Power Transmission and Gearing Conference","volume":"166 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126737597","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

Three-Dimensional Spatial Meshing Quality Pre-Control of Harmonic Drive Based on Double-Circular-Arc Tooth Profile 基于双圆弧齿形的谐波传动三维空间啮合质量预控制

Volume 10: 2019 International Power Transmission and Gearing Conference Pub Date : 2019-11-25 DOI: 10.1115/detc2019-97228

Xie Faxiang, Zhang Jing, Han Yinan, Wu Canyuan, Zhao Zhengyang, Zhan Min

引用次数: 3