The invention provides a security control method of an event-driven
network control system under a multi-
network attack. Considering the network
transmission security problem, a random network
spoofing attack, a
replay attack and a DoS
attack are sequentially introduced, and a
system closed-loop model under the multi-
network attack is established. Further considering the constraint of the limitednetwork bandwidth, an
event trigger mechanism is introduced to screen and release sampling data meeting a preset
event trigger condition to the network for transmission, thereby establishing a new switching
system model on the basis of the system closed-loop model. Based on a switching
system model, a
Lyapunov stability theory is utilized to obtain a sufficiency condition for enabling the system to meet the stability of a
mean square index, and a group of
linear matrix inequalities is solved to obtain the
gain of the state
feedback controller. Compared with an existing
controller design method, safe and stable operation of the
network control system under the influence of multi-network attacks is guaranteed, meanwhile, the
data transmission frequency is reduced, and limited network bandwidth resources are saved.