Applied Research of the Composite Antiager in Asphalt

2014 ◽  
Vol 919-921 ◽  
pp. 1191-1194
Author(s):  
Ling Zou ◽  
Nan Xiang Zheng
Keyword(s):  
Applied Research ◽  
Test System ◽  
Simulation Test ◽  
Oxidative Aging ◽  
Modified Asphalt ◽  
Positive Effects ◽  
Ultraviolet Aging

The simulation test system was established to study the performance of the thermo-oxidative aging and ultraviolet aging of 90# matrix asphalt and SBSI-C modified asphalt which were added composite antiager. Mechanism of thermo-oxidative aging and ultraviolet aging of asphalt was also analyzed. The results proved that : indexes of thermo-oxidative aging and ultraviolet aging of 90# matrix asphalt and SBSI-C modified asphalt were improved after adding the composite antiager,and composite antiager had positive effects to resist the aging of asphalt.

Ground Flutter Simulation Test Based on Reduced Order Modeling of Aerodynamics by CFD/CSD Coupling Method

2019 ◽  
Vol 11 (01) ◽  
pp. 1950008
Author(s):  
Binwen Wang ◽  
Xueling Fan
Keyword(s):  
Aerodynamic Force ◽  
Test System ◽  
Simulation Test ◽  
Robust Controller ◽  
Test Technique ◽  
Reduced Order ◽  
Aerodynamic Model ◽  
Flutter Boundary ◽  
Computational Fluid Dynamics Cfd ◽  
Good Agreement

Flutter is an aeroelastic phenomenon that may cause severe damage to aircraft. Traditional flutter evaluation methods have many disadvantages (e.g., complex, costly and time-consuming) which could be overcome by ground flutter test technique. In this study, an unsteady aerodynamic model is obtained using computational fluid dynamics (CFD) code according to the procedure of frequency domain aerodynamic calculation. Then, the genetic algorithm (GA) method is adopted to optimize interpolation points for both excitation and response. Furthermore, the minimum-state method is utilized for rational fitting so as to establish an aerodynamic model in time domain. The aerodynamic force is simulated through exciters and the precision of simulation is guaranteed by multi-input and multi-output robust controller. Finally, ground flutter simulation test system is employed to acquire the flutter boundary through response under a range of air speeds. A good agreement is observed for both velocity and frequency of flutter between the test and modeling results.

Design of Integrated Simulation Test System for Ship Platform

2021 ◽  
Author(s):  
Yong Xu ◽  
Wenjian Yao ◽  
Yuan Qu ◽  
Chao Ma
Keyword(s):  
Test System ◽  
Simulation Test ◽  
Integrated Simulation

Property of Anti-Ultraviolet Aging of LDHs Modified Asphalt

2018 ◽  
Vol 33 (3) ◽  
pp. 634-638 ◽  
Author(s):  
Hechuan Li ◽  
Jianying Yu ◽  
Shaopeng Wu ◽  
Ling Pang ◽  
Yuanyuan Li ◽  
...  
Keyword(s):  
Modified Asphalt ◽  
Ultraviolet Aging

Simulation Test System for Coal and Gas Outburst Triggered by Tunneling under Gas-Filling Condition and Its Application

2021 ◽  
Vol 45 (1) ◽  
pp. 20210048
Author(s):  
Hanpeng Wang ◽  
Wei Wang ◽  
Liang Yuan ◽  
Guofeng Yu ◽  
Jing Wang ◽  
...  
Keyword(s):  
Test System ◽  
Coal And Gas Outburst ◽  
Simulation Test ◽  
Gas Outburst

A Study on the Design and Performance of High-altitude Simulation Test System

2021 ◽  
Vol 45 (12) ◽  
pp. 645-653
Author(s):  
Minkyu Shin ◽  
Jeonghwa Oh ◽  
Taekuk Kim ◽  
Isang Yu ◽  
Youngsung Ko
Keyword(s):  
High Altitude ◽  
Test System ◽  
Simulation Test ◽  
And Performance

LXI Precision Time Protocol Applied Research

2013 ◽  
Vol 330 ◽  
pp. 561-564 ◽  
Author(s):  
Ming Li ◽  
Chun Ping Wang ◽  
Zhi Qiang Wang
Keyword(s):  
Real Time ◽  
Applied Research ◽  
Time Synchronization ◽  
Local Area Network ◽  
Local Area ◽  
Test System ◽  
Area Network ◽  
Automatic Test System ◽  
Precision Time ◽  
Precise Time

In order to meet the real-time demands of some equipment networked test, the time synchronization techniques of ATS based traditional instrument buses are compared with the techniques of LXI ATS. Accordingly，the necessity of LXI ATS time synchronization technique study is put forward. The sorts of time synchronization techniques based on Local Area Network are analyzed. In addition, some methods which could improve the level of LXI data real-time communications are presented. Afterwards, technique realizations of PTP are studied in detail. Local Area Network techniques and IEEE 1588 Precise Time Protocol are adopted in the LXI Automatic Test System which designed in the paper, and the level of time synchronization precision in the system is improved.

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