Secure Correct Control for Cyber-Physical Systems under Multiple Stochastic Physical Attacks

Secure correct control problem is discussed for Cyber-Physical Systems (CPSs) under multiple stochastic physical attacks. In particular, the attack signals considered are designed to directly destruct the security of the CPSs, which consists of three components. One is the stochastic attack signal injected into the actuator. The other one is bounded stochastic attack signal that can realize coupling with state to invade the sensor. And the third one is completely unknown attack by wireless network, aiming at tampering with the state information of CPSs. To online detect the stochastic attack signals acting on actuator, a adaptive stochastic attacks detector (ASAD) is constructed. As for the stochastic sensor attacks coupled with state, the feedback stabilizer is introduced to correct the sensor signal. An secure correct control (SCC) scheme is proposed by integrating ASAD with feedback stabilizer and robust technology. It is proved that the security control performance of the CPSs is realized. Finally, a simulation examples is given to shows the effectiveness of the proposed scheme.