Matrix System for the Analysis of Planetary Transmissions

1997 ◽  
Vol 119 (3) ◽  
pp. 333-337 ◽  
Author(s):  
Lei Tian ◽  
Lu Li-qiao
Keyword(s):  
Planetary Gear ◽  
Gear Transmission ◽  
General Analysis ◽  
Matrix System ◽  
Analysis Method ◽  
Whole Process ◽  
Computer Aided Analysis ◽  
Computer Aided ◽  
General Program ◽  
Planetary Transmission

This paper presents a new general analysis method for planetary gear transmission systems. Instead of studying portions of a transmission, one can analyze a whole planetary transmission system with a general program. Not only the kinematics, but also dynamics of a transmission are studied. The whole process of analysis is standardized to become very straight forward, making it especially suitable for the computer-aided analysis of the vehicle planetary transmissions.

Reference Intervals for Fetal Heart Volume From 3-Dimensional Sonography Using the Extended Imaging Virtual Organ Computer-Aided Analysis Method at Gestational Ages of 20 to 34 Weeks

2012 ◽  
Vol 31 (5) ◽  
pp. 673-678 ◽  
Author(s):  
Enoch Quinderé de Sá Barreto ◽  
Hérbene José Figuinha Milani ◽  
Karina Krajden Haratz ◽  
Edward Araujo ◽  
Luciano Marcondes Machado Nardozza ◽  
...  
Keyword(s):  
Fetal Heart ◽  
Reference Intervals ◽  
Analysis Method ◽  
Heart Volume ◽  
3 Dimensional ◽  
Computer Aided Analysis ◽  
Computer Aided

Improved Genetic Optimization of Electric Motorcycle Planetary Transmission

2012 ◽  
Vol 246-247 ◽  
pp. 164-168
Author(s):  
Pei Lin Yu ◽  
Wang Yong
Keyword(s):  
Planetary Gear ◽  
Optimization Method ◽  
Gray Code ◽  
Gear Transmission ◽  
Design Parameters ◽  
Preliminary Design ◽  
Genetic Optimization ◽  
Gear Trains ◽  
Planetary Transmission ◽  
Gear Drives

Determination of dedendum circle diameter of ring gear in planetary gear drives is an important issue in preliminary design of electric motorcycle transmission. Genetic optimization is used to automate preliminary design of gears by minimizing volume of gear trains. An improved genetic optimization method was applied to a planetary gear transmission of electric motorcycle. Gray code way was applied in variable binary strings for improve research efficiency. Dynamic penalty functions were introduced to the objective function for handing the design constraints. The results were compared with a enumeration method usually applied. Improved GA produced quite well results promptly supplying design parameters of a planetary gear transmission.

Study on Helical Tooth Profile Modification of Planetary Gear Transmission on the Basis of Gear Transmission Error

2011 ◽  
Vol 86 ◽  
pp. 47-50
Author(s):  
Yu Tang ◽  
Shan Chang ◽  
Zhi Qiang Wang ◽  
Kun Zhang
Keyword(s):  
Planetary Gear ◽  
Transmission Error ◽  
Tooth Profile ◽  
Gear Transmission ◽  
Mesh Stiffness ◽  
Profile Modification ◽  
Gear Mesh ◽  
Tooth Profile Modification ◽  
Planetary Transmission ◽  
Gear Mesh Stiffness

In order to minimize the fluctuation of gear transmission error (GTE) about the planetary gear transmission. A method was developed to deciding tooth profile modification curves of planetary transmission. According to the condition of the invariable design load, computing the dynamic characteristics of the planetary transmission system under modified and un-modified gear. At the same time, the compare is carried through of the dynamic characteristics for modified and un-modified gear. The results of the dynamic calculation indicate that the profile modification method can make the amplitudes of gear mesh stiffness change calmness and reduce the amplitudes of gear mesh stiffness by this method in paper. At last, the conclusion can be obtained that the tooth profile modification can reduce the vibration and noise of the planetary transmission system.

Dynamic Analysis of Planetary Mechanism for the Cutting Part of Coal Shearer

2012 ◽  
Vol 160 ◽  
pp. 356-360
Author(s):  
Wei Dong Wu ◽  
Hua Liang Li ◽  
Hong Rui Xue
Keyword(s):  
Coal Mining ◽  
Gear Tooth ◽  
Planetary Gear ◽  
Mining Machine ◽  
Analysis Method ◽  
Gear Contact ◽  
Planetary Transmission ◽  
Dynamic Meshing ◽  
Transmission Gear ◽  
Planetary Mechanism

The transmission load on planetary gear to the cutting part of coal mining machine is bigger, and the force is uneven stress while the gear driving. In order to solve this problem, and puts forward the coal mining machine cutting part planetary transmission gear contact dynamic meshing analysis method. This paper build entity modeling of coal minning machine cutting part transmission gear by established 2d model by CAXA and import PRO/E, and by using ABAQUS/Explicit as the simulation platform, assembly and analysis with dynamic meshing contact, get in gear stress of gear tooth distribution, and provide the basis to the gear shape design.

Tooth Surface Equations of Offset Orthogonal Face Gear and Simulation

2013 ◽  
Vol 694-697 ◽  
pp. 512-517
Author(s):  
Xue Yu Peng ◽  
Qing Li
Keyword(s):  
Gear Tooth ◽  
Gear Transmission ◽  
Tooth Surface ◽  
Contact Ratio ◽  
Surface Geometry ◽  
Face Gear ◽  
The Real ◽  
Computer Aided Analysis ◽  
Computer Aided ◽  
The Common

Face gear transmission is widely applied for large transmission torque, low vibration and noise, high contact ratio, not sensitive to the axial error and so on. The curved tooth face gear tooth surface geometry is different from the common spur or helical face gear. In this paper, to offset orthogonal curved tooth face gear as the research object, meshing with involute cylindrical worm, studied its tooth surface equations. With MATLAB, SOLIDWORKS and other computer-aided analysis tools, simulating the real tooth surface, drawing the offset orthogonal face gear model respectively.

Assessment of Intracranial Structure Volumes in Fetuses With Growth Restriction by 3-Dimensional Sonography Using the Extended Imaging Virtual Organ Computer-Aided Analysis Method

2015 ◽  
Vol 34 (8) ◽  
pp. 1397-1405 ◽  
Author(s):  
Ana Carolina Rabachini Caetano ◽  
Ana Cristina Perez Zamarian ◽  
Edward Araujo Júnior ◽  
Rafael Oliveira Cavalcante ◽  
Christiane Simioni ◽  
...  
Keyword(s):  
Growth Restriction ◽  
Analysis Method ◽  
3 Dimensional ◽  
Computer Aided Analysis ◽  
Computer Aided

scholarly journals Intra-observer repeatability when assessing the foetal urinary bladder volume by the Virtual Organ Computer-aided AnaLysis and SUM-OF-CYLINDERS methods: A pilot study

Ultrasound ◽  
2017 ◽  
Vol 25 (3) ◽  
pp. 156-165
Author(s):  
Mats A Fagerquist ◽  
Vivek Sethi ◽  
Eli Skytteren ◽  
Anders Oden
Keyword(s):  
Standard Deviation ◽  
Urinary Bladder ◽  
Three Dimensional ◽  
Ultrasound Images ◽  
Analysis Method ◽  
Systematic Deviation ◽  
Computer Aided Analysis ◽  
Lower Standard ◽  
Computer Aided ◽  
Technical Advances

Introduction The aim of this study was to compare the intra-observer repeatability when using two different methods for estimating the volume of foetal urinary bladders. Method The urinary bladders of 20 foetuses were documented by three-dimensional ultrasound. Standard deviation was compared when the volumes of identical bladder images were repeatedly estimated using the Virtual Organ Computer-aided AnaLysis and the experimental SUM-OF-CYLINDERS methods. Results No systematic deviation was found between the estimated volumes when using these two methods. Standard deviation was smaller for the SUM-OF-CYLINDERS compared to the Virtual Organ Computer-aided AnaLysis method (p < 0.0001). In relation to bladder volumes of 5–25 ml, standard deviation was 11–14% for the Virtual Organ Computer-aided AnaLysis and 4–5% for the SUM-OF-CYLINDERS method. Conclusions Using three-dimensional ultrasound images adapted for the Virtual Organ Computer-aided AnaLysis method, foetal urinary bladder volumes can also be estimated using the SUM-OF-CYLINDERS method. The SUM-OF-CYLINDERS method employs technical advances which may result in a lower standard deviation and therefore higher intra-observer repeatability.

scholarly journals Dynamic characteristics analysis of planetary gear system with internal and external excitation under turbulent wind load

2021 ◽  
Vol 104 (3) ◽  
pp. 003685042110356
Author(s):  
Hexu Yang ◽  
Xiaopeng Li ◽  
Jinchi Xu ◽  
Zemin Yang ◽  
Renzhen Chen
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Nonlinear Dynamic ◽  
Planetary Gear ◽  
Wind Load ◽  
Transmission System ◽  
Gear Transmission ◽  
Stiffness Ratio ◽  
Gear Transmission System ◽  
Planetary Gear System

According to the working characteristics of a 1.5 MW wind turbine planetary gear system under complex and random wind load, a two-parameter Weibull distribution model is used to describe the distribution of random wind speed, and the time-varying load caused by random wind speed is obtained. The nonlinear dynamic model of planetary gear transmission system is established by using the lumped parameter method, and the relative relations among various components are derived by using Lagrange method. Then, the relative relationship between the components is solved by Runge Kutta method. Considering the influence of random load and stiffness ratio on the planetary gear transmission system, the nonlinear dynamic response of cyclic load and random wind load on the transmission system is analyzed. The analysis results show that the variation of the stiffness ratio makes the planetary gear have abundant nonlinear dynamics behavior and the planetary gear can get rid of chaos and enter into stable periodic motion by changing the stiffness ratio properly on the premise of ensuring transmission efficiency. For the variable pitch wind turbine, the random change of external load increases the instability of the system.

Sign in / Sign up

Export Citation Format

Share Document