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

摘要： 随着工业互联网的深入应用，工业控制系统从封闭隔离系统转变为开放互联系统的同时，引入了信息安全风险.传统工业控制系统仅靠防火墙等防护手段将无法抵御工业互联网中未知及新型信息攻击，攻击可在系统中渗透传播并危害到智能仪表，因此智能仪表本身应具有攻击检测及入侵响应能力，通过一系列信息安全任务调度实现信息安全防护.然而，信息安全任务与功能安全任务间存在潜在冲突，需要任务间协调调度以确保仪表安全稳定运行.针对智能仪表任务协调调度需求，提出仪表安全任务一体化调度方法，通过对仪表多类任务统一形式化描述的基础上协调任务间冗余及冲突关系，设计了静态动态混合调度算法，实现任务一体化实时调度，最后通过实验验证该方法的有效性和可行性.

关键词: 智能仪表, 功能安全, 信息安全, 冲突消解, 任务调度