具有输入量化的信息物理系统的安全控制

针对执行器攻击、量化编码器/解码器参数不匹配和外部干扰的信息物理系统(cyber-physical systems, CPS)，设计一种新型的鲁棒自适应控制器确保其安全稳定运行。基于Lyapunov稳定理论推导出使信息物理系统具有鲁棒H2性能的充分条件，控制器的非线性结构包含两部分：一部分为干扰和量化补偿器，用于消除外部干扰和量化误差的影响，另一部分为基于隐蔽式假数据攻击上界信息的攻击补偿器，用于抑制异常检测器检测不到、未触发警报的攻击。最后，仿真算例结果表明控制器能保证闭环系统稳定并且具有较好的系统性能，说明了方法的有效性。

Security control of cyber-physical systems with input quantization

A novel robust and adaptive controller was proposed to ensure the security and stability for a class of cyber-physical systems subject to actuator attacks, external disturbances and quantization encoder/decoder mismatches. Based on Lyapunov stability theory, sufficient conditions for robust H2 performance of cyber-physical systems are derived. The nonlinear structure of the control includes two parts: one is the disturbance and quantization compensator to eliminate the influence of external disturbances and quantization error, and the other is the attack compensator using the upper bound information of the stealthy false attacks. It is used to suppress attacks that cannot be detected by the detector mechanisms. Finally, the simulation results show that the controller can guarantee the stability of the closed-loop dynamical system, which verifies the effectiveness of the proposed method.