Frequent inlet flow changes typically cause problems for averaging level controllers. For a frequently changing inlet flow the upsets do not occur when the system is in steady state and the tank level at its set-point. For this reason the tuning of the level controller gets quite complicated, since not only the size of the upsets but also the time in between them relative to the hold up of the ...

Active monitoring of a network’s congestion level can be coupled with network-level traffic control to maximise usage of bandwidth resources and avoid congestion. Explicit signalling between nodes has been introduced in literature to enable novel congestion control schemes. In this paper, we present a hybrid scheme to support distributed congestion avoidance, in which explicit feedback signalli...

This work considers a hierarchical control architecture for a class of discrete event systems which can also be applied to decentralized control systems. It is shown that nonblocking supervisory control on the high level of the hierarchy results in nonblocking and hierarchically consistent control on the low level. Copyright c ©2005 IFAC

We present a robot control system that integrates robust reactive control with efficient reasoning about actions and execution monitoring. On the reactive level, the robot is controlled using a hierarchy of low-level behaviors. On the high level, a logical representation of the world enables the robot to reason about the state of the world and to plan action sequences. If the execution of an ac...