International Symposium on Nonlinear Theory and its Applications
Modeling of Random Delay in LAN-Based Feedback Control Systems
Andreas Moegel, Wolfgang Schwarz,
PDF download (886.8KB)
If the feedback signals of control systems are transmitted over data networks, time-varying delay times occur due to the data transport mechanism. This delay affects the behavior of closed loop control systems and has to be taken into account when designing or adjusting the controller. In the paper a simulation method for control systems including random delay is proposed. The delay is modeled using a queuing mechanism with random arrival and service time generators. The complex behavior resulting from this kind of delay is analyzed and stability conditions are demonstrated. Finally consequences for the adjustment of the controllers are derived.