Design of Predictive Control Compensator for Network Delay in Networked Control

Networked control systems are becoming increasingly important due to its simplicity, scalability, flexibility. However, two challenges are network delay and packet dropout. Applying a real-time queuing protocol, we are able to limit the network delay within a control period. In this way, control signals are always sent to the actuator within a fixed time interval, making the performance of the overall NCS network deterministic and predictable, as needed in real-time control applications. This paper proposes to compensate for network delay at the actuator using past control signals. They are suitable for a large number of networked control systems.