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.

LXI Precision Time Protocol Applied Research

2013 ◽  
Vol 772 ◽  
pp. 432-435
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.

A local area network architecture for communication in distributed real-time systems

1991 ◽  
Vol 3 (2) ◽  
pp. 115-147 ◽  
Author(s):  
K. Arvind ◽  
Krithi Ramamritham ◽  
John A. Stankovic
Keyword(s):  
Real Time ◽  
Network Architecture ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Real Time Systems ◽  
Time Systems

UAV Avionics System Software Development Using Simulation Method

2013 ◽  
Vol 198 ◽  
pp. 260-265 ◽  
Author(s):  
Bartosz Brzozowski ◽  
Wiesław Sobieraj ◽  
Konrad Wojtowicz
Keyword(s):  
Real Time ◽  
High Performance ◽  
Local Area Network ◽  
Simulation Method ◽  
Local Area ◽  
Area Network ◽  
Hardware In The Loop ◽  
System Software ◽  
Sensors And Actuators ◽  
Research Platform

During last few years avionics system research platform was invented at the Military University of Technology. This modular simulator allows user to design and verify avionics system software using hardware-in-the-loop technique. Mathematical model of an airplane under tests is implemented on a high-performance computer which response to all control signals and environmental disturbances. Environment is simulated on a separate computer which can also visualize orientation and movement of the airplane. Plane structure and aerodynamic features as well as control data can be modified accordingly to user needs. The third PC is used as an interface unit between research platform and main computational unit of the avionics system. This device can send and receive information in real-time using various data protocols and interfaces depending on sensors and actuators that are planned to be used in real system. Those three computers work in a local area network and exchange data using Gigabit Ethernet standard. Possibility to simulate behavior of an UAV controlled by the developed avionics system implemented on an embedded computer working in hardware-in-the-loop mode on the platform, allows software developer to debug any part of the application in various environment conditions very close to reality. Research platform gives also the possibility to modify algorithm and adjust its parameters in real-time to verify suitability of the implemented avionics system software for the particular UAV. The avionics system software developed using this simulation method minimize expensive in-flight tests and assure failsafe performance after first successful flight

A New Approach of Time-Synchronization for LAN Based on General PC

2012 ◽  
Vol 198-199 ◽  
pp. 1672-1677
Author(s):  
Ai Dong Liu ◽  
Bin Huang ◽  
Yong Hui Zhang
Keyword(s):  
Time Synchronization ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Time Stamp ◽  
New Approach ◽  
Network Applications ◽  
Synchronous Time

Possessing a shrewd accurate time synchronous mechanism is the prerequisite of many network applications. This paper puts forward a kind of time synchronous method for LAN(local area network) based on general PC, replaces systematic clock with TSC(time stamp counter) register as synchronous time source, achieves synchronization through a client and server style, it is easy to calculate and needs less expense. The result of experiment shows that the synchronous precision of this method is higher, and can be kept longer; it also shows that this method is suitable for the application occasion which requires higher time-synchronization.

Real Time Recording System of Radioisotopes by Local Area Network(LAN)Computer System and User Input Processing.

RADIOISOTOPES ◽  
1991 ◽  
Vol 40 (9) ◽  
pp. 365-368 ◽  
Author(s):  
Kunio SHINOHARA ◽  
Atsushi ITO ◽  
Hajime KAWAGUCHI ◽  
Makoto YANASE ◽  
Kiyoshi UNO
Keyword(s):  
Real Time ◽  
Computer System ◽  
Local Area Network ◽  
Local Area ◽  
Recording System ◽  
Area Network ◽  
User Input ◽  
Input Processing

Development of Field Control System of Automated Guided Vehicle Based on Wireless Local Area Network and CAN Bus

2013 ◽  
Vol 579-580 ◽  
pp. 792-797
Author(s):  
Yan Wang ◽  
Zhong Da Yu ◽  
Chen Xing Bao ◽  
Dong Xiang Shao
Keyword(s):  
Control System ◽  
Real Time ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Can Bus ◽  
Control Unit ◽  
Local Area ◽  
Automated Guided Vehicle ◽  
Area Network ◽  
Control Units

In this paper, we realize a real-time communication based on wireless local area network (WIFI) and controller area network (CAN) bus and develop a distributed control system for an automated guided vehicle (AGV). The system consists of two levels: (1) communication between AGVs and main computer based on WIFI, (2) communicationg between control units of AGV based on CAN bus. A real-time operating system μC/OS-II was used to control time, which significantly reduces the time for program and improves development efficiency. Finally, a small-size distributed AGV controller is developed as the main control unit of AGV and a distributed I/O system is developed based on it.

Equipment management in higher education using a WLAN framework

2005 ◽  
Vol 24 (3) ◽  
pp. 209-214
Author(s):  
Shun-Hsing Chen ◽  
Ching-Chow Yang ◽  
Jiun-Yan Shiau
Keyword(s):  
Higher Education ◽  
Real Time ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Data Gathering ◽  
Local Area ◽  
Equipment Management ◽  
Area Network ◽  
Time Service ◽  
Bar Code

This study establishes a comprehensive management information system (MIS) by using not only the real-time characteristics of wireless local area network (WLAN) technology for data reading and writing, but also the convenient data input/output provided by PDA's. This system is then applied in equipment management in higher education organizations, and a centralized center is used to manage the equipment of numerous departments. This wireless equipment management system, which was established to access data instantly, increases system performance in providing real-time service. Furthermore, the integration of bar code facility and real-time equipment management function via web-based technology for managing department equipment solves accuracy problems during the data gathering process. This system increases equipment management efficiency and reduces manpower costs.

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