A study of deadband scheduling based on sensor node and controller node in NCS

A deadband scheduling method using different scheduling policies in sensor nodes and controller nodes was proposed for multi-loop networked control system, with the characteristics of fierce competition of network bandwidth resource and large network delay. In the sensor nodes, scheduling based on the difference between current sampling signal and the previous transmission signal. Constantly, to prevent the system out of control, the sensor nodes sent data packet to the network at regular intervals. In the controller nodes, combined with human-simulated intelligent method, it was determined whether the controller nodes sent data packet to the actuator nodes based on the deviation and the deviation change rate of the system. The simulation results indicated that on the basis of guaranteeing the system performance, the network data packet traffic and network delay were reduced effectively at the same time. In addition, this method is simple to implement, with great engineering application value.