关键词: 智能仪表, 功能安全, 信息安全, 冲突消解, 任务调度

Abstract: With the indepth application of Industrial Internet, industrial control systems are faced with security risks while changing from closed isolation systems to open interconnection systems. The traditional industrial control system cannot resist unknown and new information attacks in the industrial Internet only by means of firewall and other protection means. Attacks can penetrate and spread in the system and endanger the intelligent instrument. Therefore, the intelligent instruments itself should have attack detection and intrusion response capabilities, requiring it to achieve security protection through task scheduling. However, there are potential conflicts between security tasks and functional safety tasks, which require coordinated scheduling to ensure stable operation of instruments. Aiming at the coordination and scheduling requirements of intelligent instrument tasks, this paper proposes an integrated scheduling method for instrument tasks. Through unified formal description of instrument tasks, redundant and conflicting relationships between tasks are coordinated. Staticdynamic hybrid scheduling algorithm is designed to achieve integrated realtime scheduling of tasks. Finally, the effectiveness and feasibility of this method are verified through experiments.

Key words: intelligent instrument, functional safety, cyber security, conflict resolution, task scheduling