Abstract
Spinning production is a typical continuous manufacturing process characterized by high speed and uncertain dynamics. Each manufacturing unit in spinning production produces various real-time tasks, which may affect production efficiency and yarn quality if not processed in time. This paper presents an edge computing-based method that is different from traditional centralized cloud computation because its decentralization characteristics meet the high-speed and high-response requirements of yarn production. Edge computing nodes, real-time tasks, and edge computing resources are defined. A system model is established, and a real-time task processing method is proposed for the edge computing scenario. Experimental results indicate that the proposed real-time task processing method based on edge computing can effectively solve the delay problem of real-time task processing in spinning cyber-physical systems, save bandwidth, and enhance the security of task transmission.
Highlights
Spinning is the process of transferring fiber from a disorganized state to an orderly arranged state in the longitudinal direction
The physical space of spinning cyber-physical system (CPS) is composed of screws, machines, materials, methods, and rings involved in yarn production in spinning
Definition 1: Edge computing node (ECN) is defined as e 1⁄4 ðm, s, f max, b, pmax, trTime, taskÀagent, taskÀbuffer, CRpool, interactionÀwindowÞ: Definition 1 describes 10 tuples of ECN, in which m and task_buffer refer to the memory (GB) and real-time task buffer (MB), respectively, and are related to storage; s, fmax, task_agent, and CRpool refer to the central processing unit (CPU)’s computing speed (MIPS, million instructions per second), maximum frequency (MHz), maximum power (W), real-time task agent, and computing resource pool, respectively, and are concerned with computing; b and trTime refer to the bandwidth (Mb/s) and time (s) to transmit data from a node to the cloud center, respectively, which pertain to transmission on the Internet; and interaction_window refers to the interface for the ECN to interact with external nodes
Summary
Spinning is the process of transferring fiber from a disorganized state to an orderly arranged state in the longitudinal direction. Real-time requirements: 1) First, a large amount of data is produced in the spinning CPS physical space within a short time and transmitted to the cloud center as tasks waiting for processing. Security requirements: Risks involving data and order may arise during the transmission of real-time tasks between production equipment and the cloud center. This risk may cause interference or leakage and is a security issue. A method based on edge computing is proposed in this study to solve real-time tasks and meet the security requirements of task processing in spinning CPS.
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