Intrusion detection research of control system based on robot arm

Abstract

With wide application of Robot Arm in industrial control system, its security demands are increasing day by day. The paper deals with intrusion detection of Robot Arm control system based on EtherCAT fleldbus protocol, which is simulated by developed driver and data obtained from PSIM. By studying three-dimensional linked list of Snort, an intrusion detection system is designed to detect protocol and motor model. Protocol detection rules are derived from protocol characteristics and mutual restriction relations between different fields. Rules of Robot Arm control system aim at detecting core variables of speed control, torque control and position control. Users can compile rules flexibly to adapt to variety attacks. Intrusion behaviors from upper computer or storage device are simulated by user mode program. At last, intrusion detection of Robot Arm control system based on EtherCAT is tested. The results show that the designed system is able to recognize intrusions concentrate on EtherCAT and Robot Arm control system and achieved expected purpose.