Synchronization Reliability Evaluation Method for Mechanisms with Different Time Distribution

Pang, Huan; Yu, Tianxiang; Wang, Ning

doi:10.1155/2018/8756975

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…The real-time Ethernet bus in this system makes use of a kind of new synchronization method of distributed clock, which lets synchronization precision of SYNC signals of all slaves could be about 20 ns as shown in Figure 6. This performance is better (Chen et al, 2016;Pang et al, 2018).…”

Section: The New Synchronization Methods Of Bus Controllermentioning

confidence: 80%

Research on software synchronization method of real-time ethernet distributed motion control system

Huang

Chen

Zhang

et al. 2019

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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.

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Section: The New Synchronization Methods Of Bus Controllermentioning

confidence: 80%

Research on software synchronization method of real-time ethernet distributed motion control system

Huang

Chen

Zhang

et al. 2019

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show abstract

“…Unfortunately, this method was time-consuming, and thus unsuitable for strongly nonlinear models [17]. Xie et al proposed a new reliability model of a torsional spring folding wing, considering the common cause failure effect, and the availability of this method was examined using the Monte Carlo simulation method [18]. Nevertheless, the reliability index of folding wing only concerns the deployment time, ignoring the asynchronous problem caused by the deployment time difference.…”

Section: Introductionmentioning

confidence: 99%

Reliability Evaluation for Cable-Spring Folding Wing Considering Synchronization of Deployable Mechanism

Gao

Zhou

et al. 2021

Actuators

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The cable-spring folding wing is a novel type of rigid-flexible coupling structure for missiles, which is composed of several sets of deployable mechanisms, with each composed of a wheel-rope transmission system and a parallel spring driving mechanism. The movement of the cable is initiated by the driving force produced by parallel springs, which directly changes the magnitude and the distribution of the driving force. Therefore, the cable-spring folding wing system has the typical characteristics of strong nonlinearity and motion coupling. In addition, each deployable mechanism shares an identical structure, but the distribution of motion parameters is discrepant due to external loads. Asynchronous movement of the cable-spring folding wing will occur and become a significant issue, which is detrimental to the working performance and could even lead to failure. Focusing on these problems, the multi-body dynamics theoretical model and simulation model of deployable mechanism are established, the kinematic and dynamic characteristics of critical components are studied, and the key factors affecting the deployment performance are investigated. A new reliability method with an angular precision control for deployable mechanism is proposed based on the theoretical model. The effectiveness of the proposed model and method is verified by comparing it with the Monte Carlo method. On this basis, the reliability evaluation for cable-spring folding wing, comprehensively considering deployment performance and synchronization, is carried out.

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Synchronization Reliability Evaluation Method for Mechanisms with Different Time Distribution

Cited by 2 publications

References 11 publications

Research on software synchronization method of real-time ethernet distributed motion control system

Research on software synchronization method of real-time ethernet distributed motion control system

Reliability Evaluation for Cable-Spring Folding Wing Considering Synchronization of Deployable Mechanism

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