Design of New Flexible Spiral Conveying Mechanism and Experimental Device

2013 ◽  
Vol 469 ◽  
pp. 418-421
Author(s):  
Ye Tian ◽  
Dong Wen Wang ◽  
Li Zhang ◽  
Liang Ding ◽  
Fei Yang ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Power Consumption ◽  
Food Packaging ◽  
Compliant Mechanism ◽  
Discrete Element ◽  
Screw Conveyor ◽  
Working Process ◽  
Work Process ◽  
Helical Blade ◽  
The Mathematical Model

Screw conveyor is widely used in food packaging field. This paper puts forward a new kind of flexible blades of screw conveyor, to replace the traditional rigid helical blade. Based on the theory of compliant mechanism, the motion are analyzed when the flexible screw blade works. Based on the medium mechanics theory related, The interaction between flexible screw and material relations are analyzed, and the mathematical model of power consumption and transmission capacity are established. The work process of flexible screw working process is simulated with discrete element software EDEM. The result verified the theory is correct.

Multi-Objective Optimization Design of Screw Conveyor Using Genetic Algorithm

2013 ◽  
Vol 732-733 ◽  
pp. 402-406
Author(s):  
Duan Yi Wang
Keyword(s):  
Genetic Algorithm ◽  
Mathematical Model ◽  
Optimization Design ◽  
Optimization Problem ◽  
Machine Design ◽  
Screw Conveyor ◽  
Optimized Design ◽  
Multi Objective Optimization ◽  
Multi Objective ◽  
The Mathematical Model

The weight minimum and drive efficiency maxima1 of screw conveyor were considered as double optimizing objects in this paper. The mathematical model of the screw conveyor has been established based on the theory of the machine design, and the genetic algorithm was adopted to solving the multi-objective optimization problem. The results show that the mass of spiral shaft reduces 13.6 percent, and the drive efficiency increases 6.4 percent because of the optimal design based on genetic algorithm. The genetic algorithm application on the screw conveyor optimized design can provided the basis for designing the screw conveyor.

scholarly journals Optimization of the selection of sections in the distribution line considering reactive power compensation

2020 ◽  
Vol 216 ◽  
pp. 01070
Author(s):  
Ivan Bandurin ◽  
Vladimir Ivanov ◽  
Igor Kozyrev ◽  
Vladimir Korobov ◽  
Alexey Khaimin ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Power Consumption ◽  
Reactive Power ◽  
Reactive Power Compensation ◽  
End Users ◽  
Active Power ◽  
Distribution Line ◽  
The Mathematical Model ◽  
Selection Of

Today, the increase in reactive power consumption far exceeds the increase in active power consumption. Due to the increasing demands of the end-users for the quality of the supply of electricity, the problem of joint selection of rational sections and places of installation of reactive power compensation in the distribution line becomes relevant. A mathematical model and algorithm allowing such a choice are proposed. The mathematical model can be used both in the design of new lines and in the reconstruction of existing lines. An example is given.

Dimensionless Study on Efficiency and Speed Characteristics of a Compressed Air Engine

2015 ◽  
Vol 137 (4) ◽  
Author(s):  
Qihui Yu ◽  
Maolin Cai ◽  
Yan Shi ◽  
Chi Yuan
Keyword(s):  
Mathematical Model ◽  
Reference Values ◽  
Engine Performance ◽  
Power Source ◽  
Compressed Air ◽  
Working Process ◽  
Ic Engine ◽  
Rotating Speed ◽  
Inertia Parameter ◽  
The Mathematical Model

To eliminate the pollutants exhausting, this paper presents an idea of using compressed air as the power source for engines. Instead of an internal combustion (IC) engine, this automobile is equipped with a compressed air engines (CAEs), which transforms the energy of the compressed air into mechanical kinematic energy. Through analysis of the working process of a CAE, the mathematical model is setup. Experiments are carried out to verify the engine performance and the basic model’s validity. By selecting the appropriate reference values, the mathematical model is transformed to a dimensionless expression. The dimensionless speed and efficiency characteristics of the CAE are obtained. Through analysis, it can be obtained that the dimensionless average rotating speed is mainly determined by the intake duration angle, the dimensionless inertia parameter, the dimensionless exhaust pressure, and the scale factor of exhaust valve. Moreover, the efficiency of the CAE is mainly determined by the dimensionless exhaust pressure, the intake duration angle and the dimensionless cylinder clearance. This research can be referred to in the design of CAE and the study on optimization of the CAE.

Dynamic Analysis and Optimization of Pivot Points of Telescopic Jib Based on Genetic Algorithm

2014 ◽  
Vol 721 ◽  
pp. 87-90
Author(s):  
Tao Liu ◽  
Wei Hui Wang ◽  
Ren Wu Yuan ◽  
Fei Lu
Keyword(s):  
Genetic Algorithm ◽  
Mathematical Model ◽  
Dynamic Analysis ◽  
Prototype Model ◽  
Work Process ◽  
Force Condition ◽  
Lifting Force ◽  
Adams Software ◽  
Optimized Conditions ◽  
The Mathematical Model

Using ADAMS software to create a virtual prototype model of luffing mechanism of QY20A crane truck. The entire work process of telescopic arm is analyzed, and the result shows that luffing cylinder lifting force is maximum at the beginning moment. The luffing cylinder force is calculated in different conditions based on the analysis and select the maximum force condition as optimized conditions, make the mathematical model of optimization and optimized using genetic algorithm, which played a guiding role for the of telescopic boom design.

The Modeling and Simulation of UAV Pneumatic Launch System

2013 ◽  
Vol 299 ◽  
pp. 27-30
Author(s):  
Xiao Long Liu ◽  
Chuang Na Xia ◽  
Sheng Gang Ma
Keyword(s):  
Mathematical Model ◽  
Modeling And Simulation ◽  
Unmanned Aerial Vehicle ◽  
Future Development ◽  
Theoretical Foundation ◽  
Bond Graph ◽  
Inflation Pressure ◽  
Work Process ◽  
Aerial Vehicle ◽  
The Mathematical Model

This paper is based on the Bond Graph method to establish the mathematical model of UAV (Unmanned Aerial Vehicle) pneumatic launch system, simulates its work process through using MATLAB software, analyzes the influence of changing air tank inflation pressure, air tank volume on launch performance, and draws some important conclusions, which can provide a theoretical foundation for the future development and improvement of the system.

scholarly journals Mathematical modeling of piezoelectric step-engine work

2019 ◽  
Vol 3 (3) ◽  
pp. 164-170 ◽  
Author(s):  
A. V. Azin ◽  
S. A. Kuznetsov ◽  
S. A. Ponomarev ◽  
S. V. Ponomarev ◽  
S. V. Rikkonen
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Load Level ◽  
Working Process ◽  
Positioning Accuracy ◽  
Vibration Period ◽  
Piezo Element ◽  
Technical Specifications ◽  
Element Activity ◽  
The Mathematical Model

In the article the results of new piezoelectric step-engine research are presented. The original construct of piezoelectric step-engine is contained in special engineering lever called grab device that can organize back and forward rod’s motion with only one piezo element activity. To choose the effective process of piezoelectric step-engine work the mathematical model was created. This mathematical model describes inner piezoelectric step-engine process like a non-linear vibrational system. The mathematical model identifies speed of piezoelectric step-engine elements over the vibration period with different frequency, load level and voltage. The prototype of piezoelectric step-engine was produced. Experimental issues were conducted. Piezoelectric step-engine’s technical specifications are positioning accuracy over 10–6 meter, speed of movement over 10 mm per minute with weight of load to 1 kg and voltage to 100 Volt. On the results of experimental research it is defined that mathematical model enables to model working process of piezoelectric stepengine with an error not more than 10 %. This research verifies viability of proposed construction and provides the way to increase output power of piezoelectric step-engine.

REDUCTION OF THE TOTAL POWER CONSUMPTION THROUGH INCREASING THE UNIT MOTION STABILITY

2015 ◽  
Vol 10 (3) ◽  
pp. 72-76
Author(s):  
Матвеев ◽  
Ivan Matveev ◽  
Щитов ◽  
Sergey Shchitov ◽  
Валиев ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Power Consumption ◽  
Response Surface ◽  
Total Power ◽  
Stability Of Motion ◽  
Motion Stability ◽  
Total Power Consumption ◽  
The Mathematical Model

The article presents the results of investigation of impact of the machine motion stability on the reduction on power consumption of the lost crop. The mathematical model of sustainable motion of working units sections at the highest stability of motion was obtained and the response surface and its sections were constructed. The research of proposed working unit of the cultivator was conducted, which provides the reduction of power consumption to 8-10% of the lost crop by reducing the number of cut plants by stabilizing the movement of the unit ensures reduced.

Investigation of Liquid-Steam Stream Compressor

2014 ◽  
Vol 630 ◽  
pp. 109-116 ◽  
Author(s):  
M.G. Prokopov ◽  
D.A. Levchenko ◽  
A.E. Artyukhov
Keyword(s):  
Mathematical Model ◽  
Working Process ◽  
Thermophysical Model ◽  
Structural Inversion ◽  
Experimental Researches ◽  
The Mathematical Model

Thermophysical model of liquid-steam stream compressor, results of analysis of experimental researches of boiling up streams of liquid in the broadening ducting and running part of liquid-steam stream compressor, description of forming of three critical modes of flow and structural inversion of stream are presented in this article. The mathematical model of working process which allows to determine parameters and characteristics of liquid-steam stream compressor is presented.

scholarly journals Modeling of a Symmetric Five-Bar Displacement Amplification Compliant Mechanism for Energy Harvesting

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1095
Author(s):  
Moataz M. Elsisy ◽  
Mustafa H. Arafa ◽  
Chahinaz A. Saleh ◽  
Yasser H. Anis
Keyword(s):  
Mathematical Model ◽  
Energy Harvesting ◽  
Open Circuit Voltage ◽  
Compliant Mechanism ◽  
Numerical Models ◽  
Open Circuit ◽  
Design Parameters ◽  
Mathematical Representation ◽  
Piezoelectric Energy ◽  
The Mathematical Model

This paper presents an analytical model to determine a closed form mathematical representation for the output displacement of a displacement amplification compliant mechanism used for energy harvesting. A symmetric five-bar compliant mechanism with right-circular and corner-filleted flexure hinges was mathematically modeled and its displacement was determined using the Castigliano energy theorem. The stresses within the flexure joints, the weakest points in the mechanism body, were calculated. The mathematical model expresses both the displacement amplification and the stresses as functions of the design parameters and the load caused by the harvester. The developed model can be used to optimize the mechanism dimensions for maximum harvested power, while minimizing its structural stresses. The mechanism was also modeled numerically using finite element methods; both the analytical and numerical models were verified experimentally. The mathematical model of the mechanism was integrated with a model representing a piezoelectric energy harvester to calculate the open-circuit voltage. As a proof of concept, experiments were performed using an unimorph piezoelectric cantilever at low-frequency (less than 1 Hz) harmonic excitation inputs. The measured open-circuit voltage was found to be in agreement with that calculated using the proposed model, when integrated with the model representing the piezoelectric beam. The power generated by the piezoelectric harvester, equipped with the proposed displacement amplification mechanism, was more than a hundred times that without amplification.

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