Research on software synchronization method of real-time ethernet distributed motion control system. Issue 5 (4th November 2019)

• Record Type: Journal Article
• Authors: Huang, Zhengyu; Chen, Lingyu; Zhang, Lianchao; Fan, Shixun; Fan, Dapeng
• Is Part Of: Assembly automation. Volume 39:Issue 5(2019)
• Page Start: 904
• Page End: 916
• Publication Date: 2019-11-04
• Subjects: CANopen protocol -- Distributed motion control system -- High-precision synchronization -- Real-time Ethernet bus; Automation -- Periodicals; Automatic machinery -- Periodicals; Assembly-line methods -- Periodicals; Industrial engineering -- Periodicals; 670.42705
• DOI: 10.1108/AA-12-2018-0265
• Languages: English
• ISSNs: 0144-5154

Abstract

Abstract : Purpose: This paper aims to analyze the key factors influencing the synchronization performance of distributed motion control system and to improve the synchronization performance for peripherals control of this system. Design/methodology/approach: This paper deals with the software synchronization problems of distributed motion control system based on real-time Ethernet. First, combined with communication and control tasks, the key factors affecting synchronization performance of system are analyzed. Then, aiming at key factors and considering the synchronization of system bus, protocol conversion and task scheduling, a software synchronization method based on CANopen protocol and real-time Ethernet is proposed. Finally, the feasibility of this method is verified by establishing distributed motion control system and testing the synchronization performance of terminal control signals of slaves. Findings: Based on this method, the results show that the synchronization accuracy for peripherals control of all slaves could be about 100 ns. Practical implications: This research provides high-precision synchronization method, which could lay a foundation for the application of distributed motion control system in the field of assembly automation, such as multi-axis assembly robots control. Originality/value: In distributed motion control system, many factors affect the synchronization performance. At present, there is no synchronization method that could comprehensively consider these factors. This paper not only analyzes the key factors influencing the synchronization performance of system but also proposes a synchronization method. Therefore, the method proposed in this paper has certain theoretical value and engineering significance.