The application discloses a kind of networked switching
system security control method based on
encryption and decryption switching
Q learning replay attack detection, comprising: constructing switching
system model and controller model, obtain state
signal and mode
signal;Event-triggered
mechanism based on
replay attack detection is constructed, including error detection condition,
mode matching condition and
attack detection condition;According to
Q learning algorithm,
replay attack detection
mechanism based on switching
Q learning is constructed, event-triggered mechanism and replay
attack detection mechanism are used to process the mode
signal and state signal of triggered time subsystem, state
estimation value, mode
estimation value and state
estimation residual norm are obtained, the detection result of
attack is determined;State estimation value and mode estimation value are substituted into controller model, and safety controller is obtained, the equation of closed-loop
system is obtained by simultaneously solving the equation of safety controller, switching
system model, state estimator and mode estimator;Switching rule based on replay attack detection is constructed, according to replay attack detection result, the switching behavior of closed-loop system under replay attack is analyzed, and the judgment condition of
system safety and stability is obtained, the present application can accurately analyze whether replay attack is carried out, and give the
safety control discrimination condition for ensuring that switching system under replay attack, realize the
safety control of switching system.