Efficiency Modeling and Experimental Verification of Minicar Transmission System

2013 ◽  
Vol 288 ◽  
pp. 30-36
Author(s):  
Wang Ping Wang
Keyword(s):  
Transmission Efficiency ◽  
Transmission System ◽  
Test Results ◽  
Factors Affecting ◽  
Design And Optimization ◽  
Speed Range ◽  
Loss Models ◽  
Efficiency Test ◽  
Relative Errors ◽  
Input Torque

Through the analysis of factors affecting the efficiency of auto transmission system, the power loss models of all parts of the transmission system were established, and the formula of the transmission efficiency was obtained. On the basis of formulating the minicar transmission efficiency test standard, the transmission system was tested. Test results indicated that the transmission efficiency values which obtained theoretically by calculation were in reasonable agreement with experimental results, the relative errors were less than 6%，especially in commonly used input torque and input speed range. This model provides theory basis for the design and optimization of auto transmission system.

The Application of Optimising Control to an Hydraulic Drive

1973 ◽  
Vol 6 (2) ◽  
pp. 75-86
Author(s):  
G K Steel
Keyword(s):  
Control System ◽  
Hydraulic Drive ◽  
Transmission Efficiency ◽  
Transmission System ◽  
Periodic Perturbation ◽  
Control Action ◽  
Test Results ◽  
Extremum Point ◽  
Fundamental Limitations ◽  
Action Analysis

An extremum control system has been designed to maximise the transmission efficiency of an hydraulic drive. The system is of the type which use a periodic perturbation of the control signal to generate the control action. Analysis of the system shows that an optimum choice of parameters may be made to maximise the rate of tracking of a moving extremum point. A system designed on these principles has been applied to a typical transmission system and test results are given. Some fundamental limitations of the performance of this type of control system are revealed.

Research on the relationship between transmission efficiency and input torque of manual transmission

2019 ◽  
Vol 20 (6) ◽  
pp. 611
Author(s):  
Shu Yan ◽  
Geng Li ◽  
Shaopeng Tian ◽  
Qingxing Zheng
Keyword(s):  
Test Bench ◽  
Transmission Efficiency ◽  
Calculation Model ◽  
Manual Transmission ◽  
Bench Test ◽  
Theoretical Simulation ◽  
Factors Affecting ◽  
Allowable Range ◽  
Dc Bus ◽  
Input Torque

Based on the manual transmission of a micro car, this paper would present the analysis of the factors affecting the transmission efficiency (TE) and the calculation formula of TE. Accordingly, the calculation model of Matlab/Simulink TE would be built to figure out how TE varies with input torque. Meanwhile, a set of manual transmission test bench would be designed and used to verify the theoretical simulation results. It adopts a common DC bus energy feedback closed system which can feedback the power generated by the load motor to the grid through the DC bus so as to save the electricity and produce less pollution. Therefore, while the test bench can reflect the variation trend of TE about the manual transmission truly, it is comparatively reliable. Apart from being energy-saving, its unique versatility could definitely predict its exceptional potential. The data of TE obtained from the test bench are compared with the simulation result. It showed that the TE of bench test and simulation result are similar, though companied by less than 2% error difference which is within the allowable range. Most importantly, the bench test results proved the validity of the theoretical analysis statistically, which is of great necessity and significance to the research of TE.

Test Design on Minicar Transmission System Efficiency Using Dimensional Analysis

2012 ◽  
Vol 192 ◽  
pp. 222-226
Author(s):  
Wang Ping Wang ◽  
Yi Min Mo
Keyword(s):  
Dimensional Analysis ◽  
Power Loss ◽  
Transmission Efficiency ◽  
Transmission System ◽  
Test Design ◽  
Analysis Theory ◽  
Test Parameters ◽  
Gear Transmission System ◽  
Efficiency Test ◽  
The Relationship

Based on formulating the minicar transmission efficiency test standard,the test was designed by using dimensional analysis theory. Selected the power loss of transmission system as evaluation index, the effects of parameters such as oil temperature,oil depth of stir oil gear, line speed of stir oil gear, transmission system ratio, input speed and input torque were experimented. It has the advantages of less test times and more design freedom. The test design provides theory basis for the empirical formula which indicates the relationship between power loss and test parameters.

Efficiency Sensitivity of Two-Stage Planetary Gear Transmission System Based on Graph Theory

2012 ◽  
Vol 215-216 ◽  
pp. 1058-1061
Author(s):  
Ming Chen
Keyword(s):  
Transmission Rate ◽  
Planetary Gear ◽  
Transmission Efficiency ◽  
Gear Ratio ◽  
Transmission System ◽  
Gear Transmission ◽  
Design And Optimization ◽  
Basic Circuit ◽  
Gear Transmission System ◽  
Representation Method

This paper first establishes the graphic model and basic circuit equation of dual planetary gear transmission system based on modified complex joint picture representation method and basic circuit method. And then according to this model analyses the rotating relation and torque relation of dual planetary gear transmission system deduces the calculation formula of transmission rate efficiency. The sensitivity of each gear ratio to transmission efficiency is defined with the method of sensitivity analysis. By calculation and analysis, the influence degree of each gear ratio on transmission efficiency is obtained. The result can provide a basis for the design and optimization of dual planetary gear transmission system.

scholarly journals PARAMETER OPTIMIZATION AND EXPERIMENT OF ORCHARD DOUBLE ROW DITCHING-FERTILIZING MACHINE

2020 ◽  
pp. 9-18
Author(s):  
HongJian Zhang ◽  
ChunBao Xu ◽  
ShuangXi Liu ◽  
Hao Jiang ◽  
Xuemei Liu ◽  
...  
Keyword(s):  
Conveyer Belt ◽  
Test Results ◽  
Double Row ◽  
Factors Affecting ◽  
Design And Optimization ◽  
Belt Speed ◽  
Guide Plate ◽  
Contour Lines ◽  
Test Parameters ◽  
Mechanism Parameter

In order to improve the fertilization uniformity and stability of the orchard double row ditching-fertilizing machine, the design was optimized. Firstly, the factors affecting the movement of the fertilizer particles were analysed in combination with the kinetic model of the fertilizer particles during the falling process. Secondly, the influence of each factor on the fertilization uniformity was analysed by single factor variance. Finally, the Box-Behnken central composite method was used to establish a mathematical model of fertilization uniformity of the orchard double row ditching-fertilizing machine, and regression statistical variance, response surface, and contour lines were used to analyse the influence of each mechanism parameter on the fertilization uniformity. The test results show that: when the test parameters of the conveyer belt speed is within 165~235 r·min-1, the advancing velocity is within 0.8~1.2 m·s-1, and the guide plate angle is changed within the range of 15~45°, the degree of influence of each factor on the fertilization uniformity from high to low is the conveyer belt speed, advancing velocity, the angle of the guide plate, and the conveyer belt speed; when the conveyer belt speed is 214 r·min-1, advancing velocity is 1 m·s-1, and the angle of the guide plate is 37°, the fertilizer coverage reaches 100%, and the fertilization uniformity is increased from 86.31% to 90.73%, and the fertilization stability is improved. The research results provide a theoretical basis for the design and optimization of orchard ditching-fertilizing machine.

Progress in Design and Application of the Lysholm-Smith Torque Converter, with Special Reference to the Development in England

1935 ◽  
Vol 130 (1) ◽  
pp. 193-230 ◽  
Author(s):  
H. F. Haworth ◽  
A. Lysholm
Keyword(s):  
Balance Sheet ◽  
Torque Converter ◽  
Test Results ◽  
Production Testing ◽  
Output Torque ◽  
Speed Range ◽  
Present Design ◽  
Combined Action ◽  
Design And Manufacture ◽  
Input Torque

The Lysholm-Smith torque converter is of the closed-circuit turbine type. An approximate balance sheet is given showing the principal losses. As a torque converter is required to run at widely different primary and secondary speeds and torques the blade losses at varying inlet angles are the most important, particularly at starting and at secondary speeds, where the output torque is equal to or less than the input torque. A brief theory of the effect of blade friction is given together with the results of some experimental work with a reaction balance. The first converter was based on these results, and after it had been tested in England and Sweden, several experimental units of 100 to 150 h.p. were made. From the experience gained with these the present design was evolved. The main points to be provided for in the design and manufacture of the torque converter are set out and the experimental and production testing is described. Difficulty was found in presenting the test results in a simple form which would give the complete characteristics of the converter with all possible combinations of primary and secondary torques and speeds, but a method was devised such that if the torque-speed curve of the driving unit is given, a curve can be immediately constructed to give the combined action of the driving unit and the converter for the complete speed range. The results of experiments showing the alterations produced by various blade angles and wheel diameters are given, and various applications of this type of transmission are described, including a 1,000 h.p. variable-blade converter.

The influence of intention implementation on throw effectiveness of young basketball players

2014 ◽  
Vol 6 (4) ◽  
Author(s):  
Dominika Wilczynska ◽  
Patrycja Lipinska ◽  
Malgorzata Wolujewicz-Czerlonko
Keyword(s):  
Heart Rate ◽  
Test Results ◽  
Basketball Players ◽  
Physical Effort ◽  
Male And Female ◽  
Mental Preparation ◽  
Physiological Cost ◽  
State Orientation ◽  
Efficiency Test ◽  
Visualization Techniques

AbstractBackground: The purpose of the following research was to find out the influence of imaginary training based on intention implementation on throw effectiveness of young basketball players, both male and female in stressogenic situations. Individual differences (action vs state orientation) between players were also measured in this research.Material/Methods: 76 players (32 females and 44 males) in the cadet category (15-16 years old) from basketball clubs of Gdansk, Gdynia and Sopot took part in this research. In the first stage all players did a throw efficiency test ERPE 05 under two conditions, and their heart rate was measured. Then players were randomly assigned to one of two groups. The first one did imaginary training based on the influence of intention implementation for 10 days, while the other did not. After 10 days ERPE 05 test under two conditions was run again.Results: Test results showed that intention implementation does not influence effectiveness improvement in stressogenic conditions as far as state-oriented players are concerned, but it does lower the physiological cost of physical effort in form of a decreased heart rate.Conclusions: This research proves that visualization training based on implementation instructions does influence young players’ physiology and significantly lowers their heart rate under stressogenic conditions. However useful, visualization techniques used in this research still need other tests and should be applied for a longer period of time to acutely show how they affect young players’ mental preparation

Improving the Strength of Abrasive Wheels and Optimizing the Control over the Strength of Composite Abrasive Materials

2019 ◽  
Vol 946 ◽  
pp. 380-385
Author(s):  
Boris A. Chaplygin ◽  
Viacheslav V. Shirokov ◽  
Tat'yana A. Lisovskaya ◽  
Roman A. Lisovskiy
Keyword(s):  
Mechanical Properties ◽  
Test Results ◽  
Key Factors ◽  
Special Equipment ◽  
Material Density ◽  
Factors Affecting ◽  
Control Factors ◽  
Reinforcing Material ◽  
Special Studies ◽  
First Time

The strength of abrasive wheels is one of the key factors affecting the performance of abrasive machining. The paper discusses ways to improve the strength of abrasive wheels. The stress-state mathematical model presented herein is a generalization of the existing models. It is used herein to find for the first time that there are numerous optimal combinations of the elastic modulus and reinforcing material density, which result in the same minimum value of the objective function. It is found out that increasing the radius of the reinforcing component while also optimizing the mechanical properties of its material may increase the permissible breaking speed of the wheel several times. We herein present a regression equation and a nomogram for finding the optimal combination of control factors. Conventional methods for testing the mechanical properties of materials, which have been proven reliable for testing metals and alloys, are not as reliable for testing abrasive materials, as the test results they generate are not sufficiently stable or accurate. We therefore propose an alternative method that does not require any special equipment or special studies.

scholarly journals Evaluation of Bleeding Resistance in Chip Seal and Asphalt Emulsion Residue Rheology

Coatings ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 670
Author(s):  
Preeda Chaturabong
Keyword(s):  
Influence Factors ◽  
Application Rate ◽  
Test Methods ◽  
Test Results ◽  
Asphalt Emulsion ◽  
Aggregate Gradation ◽  
Factors Affecting ◽  
Promising Tool ◽  
Chip Seal ◽  
Asphalt Emulsions

Chip seal bleeding is influenced by many factors, including design inputs, material properties, and project-specific conditions. It reduces the surface texture of the pavement and thus compromises the safety of the traveling public. Even though factors that bring about premature bleeding are known, currently, no laboratory test methods for evaluating bleeding in chip seals have been specified. The objective of this paper is to present the results of an investigation of the influence factors of asphalt emulsion residue properties measured by the ASTM D7405 multiple stress creep and recovery (MSCR) test, as well as other factors related to chip seal bleeding resistance as measured by the modified loaded wheel test (MLWT). In this study, the MSCR test was used as a tool for evaluating the performance of asphalt emulsions because it has been identified as a potential test related to bleeding in the field. In addition, MLWT was selected as a tool for evaluating chip seal bleeding performance in the laboratory. The results of the MLWT showed that the emulsion application rate (EAR), aggregate gradation, and emulsion properties were significant factors affecting bleeding. The MSCR test was found to be a promising tool for the performance evaluation of asphalt emulsion residue, as the test was able to differentiate between emulsion chemistries and modifications in terms of sensitivity to both temperature and stress. In relation to chip seal bleeding resistance, only the creep compliance (Jnr) obtained from the MSCR test results was identified as a significant property affecting potential for bleeding.

scholarly journals Optimal design of high efficiency double helical gear based on dynamics model

2021 ◽  
Vol 3 (8) ◽  
Author(s):  
Fengxia Lu ◽  
Xuechen Cao ◽  
Weiping Liu
Keyword(s):  
Dynamic Model ◽  
High Efficiency ◽  
Bending Strength ◽  
Sliding Friction ◽  
Elastohydrodynamic Lubrication ◽  
Optimization Method ◽  
Transmission Efficiency ◽  
Helical Gear ◽  
Transmission System ◽  
Vibration Displacement

AbstractA 16-degree-of-freedom dynamic model for the load contact analysis of a double helical gear considering sliding friction is established. The dynamic equation is solved by the Runge–Kutta method to obtain the vibration displacement. The method combines the friction coefficient model based on the elastohydrodynamic lubrication theory with the dynamic model, which provides a theoretical basis for the calculation of the power loss of the transmission system. Moreover, the sensitivity analysis of the parameters that affect the transmission efficiency is carried out, and an optimization method of meshing efficiency is proposed without reducing the bending strength of the gears. This method can directly guide the design of the double helical gear transmission system.

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