Model-based compensation for multi-packet transmission in networked control systems

The sensing data is usually transmitted simultaneously from the sensor to the controller in conventional control systems. However, in networked control systems it is possible that a set of sensing data is transmitted via multiple separate data packets due to the multiple, geographically dispersed sensors. This scenario, referred to as “multi-packet transmission”, brings to the system different delays for different parts of the sensing data. Within the packet-based control framework for networked control systems, a novel control structure is proposed. The negative effects of multi-packet transmission are effectively dealt with by first reconstructing the sensing data at the controller side and then compensating for the communication constraints using the packet-based control approach. Numerical examples illustrate the effectiveness of the proposed approach.