Event-Triggered Output Feedback Control for Networked Control Systems using Passivity: Triggering Condition and Limitations

Authors: Han Yu and Panos J. Antsaklis

50th IEEE Conference on Decision and Control and European Control Conference (CDC-ECC) Orlando, FL, USA, December 12-15, 2011

Abstract:

Most of the work on event-triggered control in
the literature is based on static state-feedback controllers. In
this paper, a dynamic output feedback based event-triggered
control scheme is introduced for stabilization of Input Feedforward
Output Feedback Passive (IF-OFP) networked control
systems(NCSs), which is a more general case compared with
the passive and the OFP systems investigated in our previous
work [20]. The triggering condition is derived based on the
passivity theorem which allows us to characterize a large class
of output feedback stabilizing controllers. We show that under
the triggering condition derived in this paper, the control system
is finite-gain L2 stable in the presence of bounded external
disturbances. We provide some analysis on the inter-event time
which reveals the difficulties of obtaining a common lower
bound on the inter-event time when the full-state information
of the plant is not used. Some challenges of applying eventtriggered
control to real time NCSs are also discussed.