Chaotic Dynamics Characteristic Analysis for Matrix Converter

Because of the high speed, strong coupling between aerodynamics and propulsion system, complex environmental conditions and new propulsion system, the airbreathing hypersonic vehicles have a complex dynamics characteristic. This paper use the generic hypersonic vehicle model (CSULA-GHV) to research this issue. The nonlinear longitudinal equations of motion are linearized based on the assumption of little perturbation. Analyze the dynamic characteristic on a feature point selected. The results show that, the stability of this model is poor. It has to design an efficient controller to adjust the poor stability.

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Dynamics Characteristic Analysis of Deliberate Mistuned Bladed-Disk System in Compressor Based on CMS Mothod

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.305.192 ◽

2011 ◽

Vol 305 ◽

pp. 192-197 ◽

Cited By ~ 2

Author(s):

Hui Qun Yuan ◽

Liang Zhang

Keyword(s):

Dynamic Test ◽

Frequency Difference ◽

Costal Margin ◽

Test Results ◽

Characteristic Analysis ◽

Disk System ◽

Rotating Speed ◽

Bladed Disk ◽

Dynamics Characteristic ◽

Better Than

In this paper first,a method combining dichotomy and finite element is presented which identify elastic modulus parameters of mistuned bladed based on the test data of blade static frequency and simulation blade deliberate mistuned by change elastic modulus.Then, dynamic characteristics of deliberate mistuned 10Hz and 41Hz bladed-disk system were analyzed in work rotating speed based on CMS mothod, respectively. The exciting force of airflow exert on costal margin of blade tip.According to dynamic test results,the incentive order is 4. The analysis results show that along with the mistuning frequency difference increases,the largest amplitude of blade is becoming smaller(except tuned system) , and scheme of large frequency difference 41Hz deliberate mistuned (scheme Ⅱ) better than scheme of small frequency difference 10Hz deliberate mistuned (scheme Ⅰ) for vibration reduction of bladed-disk system in work rotating speed for 11300r/min. The analysis results are consistent with the dynamic test results.

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Voltage Transfer Characteristic Analysis of Dual-Bridge Matrix Converter

2008 International Conference on Intelligent Computation Technology and Automation (ICICTA) ◽

10.1109/icicta.2008.232 ◽

2008 ◽

Author(s):

Zhiyong Li ◽

Hao Cai ◽

Xiaoying Li ◽

Haixia Chen ◽

Ping Li

Keyword(s):

Transfer Characteristic ◽

Matrix Converter ◽

Characteristic Analysis

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Based on ANSYS Workbench High Speed Electricity Spindle Dynamics Characteristic Analysis

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.385-386.324 ◽

2013 ◽

Vol 385-386 ◽

pp. 324-328

Author(s):

Xiao Hua Song ◽

Shao Long Wu

Keyword(s):

High Speed ◽

Natural Frequencies ◽

Characteristic Analysis ◽

Finite Element Software ◽

Spindle Dynamics ◽

Bearing Stiffness ◽

Stability Dynamics ◽

Stiffness And Damping ◽

Dynamics Characteristic ◽

Ansys Workbench

This paper describes the inherent characteristics, dynamic response and dynamic stability dynamics of vibration capability that impacts of high-speed electric spindle. Taking the high-speed, high-power electric spindle milling center on as the object of the research, modal analyzing of electric spindle with the finite element software ANSYS Workbench, researching the spindle modes, natural frequencies and critical speed of electric spindle, to get each frequency and vibration type, pointed the affection of what spindle away from the anti-vibration frequency requirements, well before bearing stiffness and damping of the vibration to the spindle system. It provides the necessary basis for further dynamic analysis by modal analysis.

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Voltage Transfer Characteristic Analysis of Matrix Converter

2009 International Conference on Measuring Technology and Mechatronics Automation ◽

10.1109/icmtma.2009.574 ◽

2009 ◽

Author(s):

Hao Cai ◽

Yue Cai ◽

Xiaoying Li

Keyword(s):

Transfer Characteristic ◽

Matrix Converter ◽

Characteristic Analysis

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Dynamic Analysis on the Starting Process of First Conveyor’s Scraper Chain

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.851.279 ◽

2016 ◽

Vol 851 ◽

pp. 279-285 ◽

Cited By ~ 1

Author(s):

Qiang Li ◽

Ming Yu Zhang ◽

Jun Mao

Keyword(s):

Differential Equation ◽

Mathematical Model ◽

Characteristic Analysis ◽

Technical Parameters ◽

Adjustment Time ◽

Start Up ◽

Starting Process ◽

Set Up ◽

The Mathematical Model ◽

Dynamics Characteristic

For the study of first conveyor chain dynamics behavior when it is started and seek the theory basis for the chain breakage on first conveyor, set up the mathematical model of the first conveyor and its scraper chain by using finite-element method. And then did the dynamics characteristic analysis between scraper chains with material, set up the differential equation. Took advantage of the mathematical model and the differential equation, and combined with the type of EBZ160 road header's technical parameters, did dynamic simulation. It draw a conclusion that during the start-up process the chain speed fluctuates a large range between, the maximum stress value on scraper chain is 1.15×104N appeared after 1s, chain tension adjustment time is about 10s, the biggest adjustment time is 12s.

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Dynamics Characteristic Analysis of Deliberate Mistuned Bladed-Disk System in Compressor Based on Substructure Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.141.129 ◽

2011 ◽

Vol 141 ◽

pp. 129-133 ◽

Cited By ~ 2

Author(s):

Hui Qun Yuan ◽

Liang Zhang ◽

Lin Song

Keyword(s):

Elastic Modulus ◽

Dynamic Test ◽

Frequency Difference ◽

Test Results ◽

Characteristic Analysis ◽

Disk System ◽

Substructure Method ◽

Bladed Disk ◽

Dynamics Characteristic ◽

Large Frequency

In this paper, based on the test data of blade static frequency and simulating blade deliberate mistuned by changing elastic modulus, a method combining dichotomy and finite element is presented which can identify elastic modulus parameters of mistuned blades. Then, when value of the frequency difference is 5Hz and 41Hz, dynamic characteristics of deliberate mistuned bladed-disk system are investigated separately under operating speed, on the basis of substructure method. Apply the exciting force of airflow on the fronts of blades tip. According to dynamic test results, it takes 4 as the excitation order. The analysis results show that with the mistuned frequency difference increasing, the largest amplitude of blade will decrease gradually. The deliberate mistuned scheme of large frequency difference as scheme Ⅱ is more effective than the small one as schemeⅠto reduce the vibration of bladed disk system under working speed of 11300r/min. The analysis results are consistent with the dynamic test ones.

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