无界DoS攻击下网络控制系统的多路径切换保护

Multi-path switching protection for networked control systems under unbounded DoS attacks

研究了网络化控制系统在无界拒绝服务攻击下的策略设计和闭环稳定性.首先考虑到数据通信网络中通常存在多条路径,设计了一种多路径切换保护策略.该策略由执行器端DoS攻击检测模块和传感器端多路径切换模块组成,执行器端DoS攻击检测模块从正常的数据包丢失中识别DoS攻击,传感器端多路径切换模块在必要时有效切换数据传输路径.然后,给出了闭环系统全局均方渐近稳定的充分条件,并给出了相应的控制器增益设计方法.数值算例验证了所提方法的有效性.

The strategy design and closed-loop stability of networked control systems under unbounded denial of service(DoS)attacks are probed.A multi-path switching protection strategy is firstly designed by noticing the usually available multiple paths in data communication networks.The strategy consists of a DoS attack detection module at the actuator side to identify DoS attacks from normal data packet dropouts,and a multi-path switching module at the sensor side to effectively switch the data transmission path when necessary.Then,the sufficient conditions for the closed-loop system being global mean square asymptotic stability are given,with a corresponding controller gain design method.Numerical examples illustrate the effectiveness of the proposed approach.