带有量化的信息物理系统安全控制

Secure control for cyber-physical systems with quantization

本文针对量化环境下的信息物理系统(CPS)提出了一种安全控制方法。考虑执行器和传感器同时受到攻击,并且在信息传输过程中受到量化影响,首先设计了一种中间观测器对系统状态和攻击信号同时进行估计,并基于估计值设计了容侵控制器,通过李雅普诺夫稳定性分析得到保证闭环系统状态一致最终有界的充分条件。该方法通过直接调节某些特定参数可以抑制量化误差的影响,并且不需要引入任何性能指标。最后通过网络化运动控制系统验证了所提方法的有效性。

A secure control method for the cyber-physical system(CPS)with quantization is proposed.Both of the actuator and sensor attacks are considered,and the system is subject to quantization during the transmission of information.Firstly,an intermediate observer is designed to estimate both of the system states and the attack signals,based on the estimation,an attack tolerant controller is designed.Subsequently,through the analysis of Lyapunov stability theory,the sufficient conditions are obtained for ensuring the states of the closed-loop system state to be ultimately uniformly bounded.The effect of quantization error can be suppressed by directly adjusting certain parameters without introducing any performance indices.Finally,the effectiveness of the proposed method is verified by a networked motion control system.