Event-based output-feedback control

Abstract

Event-based control aims at reducing the information exchange over the communication network in control systems. This paper extends an event-based state-feedback approach published recently towards event-based output feedback. The measurable output is affected by measurement noise. The analysis shows that by incorporating a state observer in the event generator, a stable behavior of the event-based control loop can be guaranteed. Moreover, it will be shown that the maximum communication frequency within the control loop is bounded.

An introduction to event-triggered and self-triggered control

“…These observations are in line with the results in the networked control literature in which model-based approaches indeed often perform better [54]. It is also worthwhile to mention the connection of the usage of model-based predictions to the work in [19], where the relevance of generalized holds was mentioned, and the work in [44], [43] in which the term signal generator was used based on model-based predictions (although in absence of a resource-constrained controller-to-actuator channel).…”

“…A formal analysis can be found in the more recent work [43], which extends the work in [44] that assumed availability of the full state. The work in [43] focuses on continuous-time plants perturbed by a bounded disturbance and measured outputs affected by bounded measurement noise. A signal generator (contained in the controller system in the setup depicted in Fig.…”

“…An example of integrating this event-based state estimator with a periodically time-triggered control algorithm is provided in [25]. In [25] the triggering condition does not use the estimated state as, for instance, in [43]. For time-stamped measurements, one can also adopt a timevarying discrete-time Kalman filter approach to obtain a good estimate of the state.…”

Output Feedback Event-Triggered Control

“…To the best of our knowledge, the problem of output feedback ETC has been first investigated in [53] and then in [8,22,30,41,55,58,72,84,100,105,126] for LTI systems and only in [123] for nonlinear systems. We have seen above that the event-triggered controller proposed for LTI systems in [22] guarantees a practical stability property.…”

Predictive control of networked control systems based on event-triggered

“…The network data transmission quantity can be reduced effectively by event-triggered communication scheme, and the load of communication channel will be relieved and the packet loss will be reduced afterwards. There are a lot of fruitful literatures at home and abroad in the respect [1][2][3] . In [4], a distributed event-triggered scheme was proposed taking network-induced delay and packet loss into account.…”