Analysis of delay and traffic load in networked control system

Time delay and delay jitter are the critical issues in system design of networked control systems (NCS). Aiming at the particularity of control network, the conceptions of loop-delay and network-delay are proposed in view of control and network, and their intentions, properties and acquiring methods are compared. The theoretical analysis and mathematic description about characteristic and evaluating index of network-delay are presented. Furthermore, the traffic load composition and estimating method are discussed. Taking the double-motors synchronization control system as an example, the simulation of corresponding NCS is implemented. The validity of above mentioned methods is verified.