Title :
Hardware-based solution of precise time synchronization for Networked Control System
Author :
Huang, Wenjun ; Jin, Yuan ; Wang, Weimin ; Shi, Yiming ; Zhou, Yun
Author_Institution :
State Key Lab. of Ind. Control Technol., Zhejiang Univ., Hangzhou, China
Abstract :
A hardware-based solution of precise time synchronization over Ethernet was proposed for Networked Control System (NCS). Using Field-programmable Gate Array (FPGA), hardware-based solution was designed for implementing time synchronization protocol defined in IEEE 1588. Timestamp capture, oscillator frequency compensation, time synchronization and etc., were all coded with Very High Speed Integrated Circuit Hardware Description Language (VHDL). Based on Kalman filter, time synchronization arithmetic was optimized to enhance the accuracy. The test results show that time accuracy reaches to sub-microsecond range, and the solution which makes system time synchronization easily is flexible and scalable for NCS and instruments.
Keywords :
Kalman filters; field programmable gate arrays; hardware description languages; local area networks; networked control systems; Ethernet; FPGA; IEEE 1588; Kalman filter; NCS; VHDL; field programmable gate array; hardware based solution; networked control system; oscillator frequency compensation; precise time synchronization; time synchronization; time synchronization arithmetic; time synchronization protocol; very high speed integrated circuit hardware description language; Accuracy; Delay; Field programmable gate arrays; Kalman filters; Oscillators; Radiation detectors; Synchronization; Ethernet; FPGA; Frequency Compensated Clock; Networked Control System; Precise time synchronization;
Conference_Titel :
Electronics, Communications and Control (ICECC), 2011 International Conference on
Conference_Location :
Zhejiang
Print_ISBN :
978-1-4577-0320-1
DOI :
10.1109/ICECC.2011.6067829
