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研究了在节点安全互相关特性及服务质量要求下,工业网络控制系统中网络节点安全性能部署优化问题.由网络化节点安全性能互相关的理论,引入协同安全系数表征节点安全性能,同时分析网络节点安全措施及计算性能对系统实时性的影响,以最小化网络部署总成本为目标,建立优化问题.进而采用凸规划理论将对偶问题分解为安全配置与性能配置分布式问题并使用次梯度方法求解.数值仿真结果验证了节点的互相关特性、以及安全性和实时性的制约关系,并表明该模型可以获得收敛的优化解,对工业控制网络设计与部署有指导意义.
In this paper, the optimization of network node security deployment in industrial network control system is studied under the requirements of node cross-correlation and quality of service.According to the theory of cross-correlation of network node security performance, the collaborative security factor is introduced to describe the node security performance, Node security measure and computing performance on the real-time performance of the system, the optimization problem is established with the goal of minimizing the total cost of network deployment, and then the convex programming theory is used to decompose the dual problem into the security configuration and the performance allocation distributed problem and the sub-gradient method The numerical simulation results verify the cross-correlation characteristics of nodes, as well as the security and real-time constraints, and show that the model can obtain the optimal solution of convergence, which is instructive for the design and deployment of industrial control networks.