稀疏恶意攻击下的信息物理系统的“PID”型性能和安全控制

Secure control and proportional-integral-derivative performance of cyber-physical systems with sparse adversarial attacks

针对遭受稀疏恶意攻击的离散时间线性系统,本文研究其安全控制问题.假设恶意攻击者受有限资源的约束,仅能操控远程控制器和执行器之间的若干通信通道.对于设计者来说,并不知道哪些通道受到攻击,哪些通道没有受到攻击.本文提出了一种新的安全的远程控制方法,它由控制律、切换函数和选择机制构成.选择机制为控制律提供合适的反馈增益,并产生一个切换函数,用以阻止攻击信号进入被控对象.理论分析表明,在基本的和必要的假设条件下,本文考虑的安全控制问题可转化为求解状态反馈镇定问题.本文所提控制方法,能保证闭环系统的稳定性且使其具有"PID"型性能的抗攻击能力.最后,通过对某无人地面车辆系统的仿真实验,验证了理论结果的正确性.

This study investigates the secure control problem for discrete-time linear systems with sparse adversarial attacks.The adversarial attacker is assumed to have limited resources and the capability of manipulating a certain number of communication channels between the remote controller and the actuators.For the designer,which channels are attacked and which are not are unknown.A novel secure remote control method is established in this study.This method consists of a control law,a switching function,and a selection mechanism.The selection mechanism is designed to help select a proper feedback gain for the control law and to produce a switching function that prevents attack signals from entering the plant.Under basic and necessary assumptions,the theoretical analysis shows that the secure control problem can be transformed into a state feedback stabilization problem and that the resulting closed-loop system is stable and resilient to proportional-integral-derivative attacks.Simulation on an unmanned ground vehicle system is performed to verify the theoretical results.